Ford - F150 :: 1997 - Engine Rough Idle For 6 - 9 Seconds Then Dies
Dec 3, 2012
Ive been having a problem where the engine cranks and idles, sometimes rough, then I try to accelerate and the car shakes and accelerates very slowly with shaking. I replaced plugs coil and leads and fuel filter with no effect but put on a new egr valve and that fixed the problem for 2 months. The same thing happened again and I cleaned the evr solenoid and that fixed the problem for 1 month. Then the same thing happened while I was out and while limping home it fixed itself. Now a month later, the same thing happened, but when I got home and shut it off, the engine won't idle properly (very rough) for 6-9 seconds then dies. I don't know what to check at this point. Thinking it may be vacuum related or possibly a fuel injector or magic gremlins at this point.
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I just replaced the water pump and put it all back together, now it won't run well enough to drive. Checked vacuum system, all sensor connections, hoses, gas cap, changed fuel filter, I can hear the fuel pump kick in, reset system with battery disconnected and have looked at everything I can think of so far.
Now - starts fine, idles about 10 seconds and then begins to idle rough and dies. If I use the throttle I can often keep the idle up, but then backfires or acts like no fuel and again dies. Used fuel cleaner and made sure there was plenty fuel in tank.
I am looking at replacing sensors at this point but which one first?? They get a bit expensive real quick.
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'1999 F150, 5.4L, 85K miles ....
Fuel pump failed last year, had it replaced. Ran fine for a week or 2, then one day went into limp-home mode. Mech replace fuel pump relay, again ran fine for a month or so. Now when the ambient temp gets above 80F or so (yeah, it has already this year - I'm in Central TX), engine at full op temp, I'm experiencing some sort of heat-soak issue. Engine runs fine when cold, and at normal op temps on the road, but if it is parked for 15 - 20 minutes then restarted, the idle goes all funky - nearly dies, surges, etc. for a minute or 2, and then it seems ok.
I would go back to the same mech, but he had to close his shop due to health issues, so I'd like to see if I can resolve this. So, it is definitely heat-triggered, and "seems" like a fuel issue, but of course it could be some electrical contact having difficulty above a certain temp.
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2000 5.4l lariat. My cylinder 1 for 2 years has been poping p0301code and has a rough idle at start for about 30 seconds. It also has a little white smoke for that 30seconds. new cop, new spark plug, new spark plug pig tail, swapped injectors to different cylinders multiple times to change code no luck. Compression dry and wet are at 200 and all cylinders are within10%. I had a dorman intake manifold installed 4 years ago and the code came a few years after. Im thinking intake manifold gasket is bad between cylinder 1 and the heater bypass tube allowing coolant to slowly leak down into the cylinder causing my rough start. I looked through the injector hole but could not tell. With all the info I have given is there any other places or things that it could be before I do a gasket replacement or is all my tests leading to the intake manifold gasket...
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I am currently working on a 97 ranger with a 4cyl and 5 speed. its having some idle issues that i cant seem to pin point, you can start it and it will idle rough then when you rev it up it chugs real hard then dies. used my scan tool and all the sensors are good, fuel pressure is good, good compression, all 8 plugs are firing good and no codes. The other deal that has me a little confused is when I unhook the hose that runs from the air intake tube to the valve cover, I get a lot of vacuum at that port on the valve cover that the hose hooks to. Also when I plug it and pull the dipstick, I get vacuum at the dipstick tube. never seen this before but at the same time I've only messed with very few of these trucks so I don't know whats normal.
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I have a 1999 B4000 4.0L with 160K miles on it. Bought the truck new. Up until about a year ago it ran perfect but has developed an idle, stalling and occassional jerky ride problem. It occurs at any temperature, engine hot or cold, A/C clutch on or off and in Park, Drive or Neutral. When you start the engine it will not idle unless you keep your foot on the gas. The idle speed will drop to 200-300 rpm and the engine dies. Sometimes you can barely tap the gas pedal and the rpm will shoot up to normal idle speed (about 900 rpm) and stay there a few seconds then begin to drop again. If the engine is cold it will often die a couple times after starting even with the foot on the gas and then about the 2nd or 3rd time run with your foot on the gas.
At stop signs and red lights you have to keep your foot on the gas to keep it running. If you are approaching a stop sign and take your foot off the gas to coast to a stop and brake, the engine rpm will drop and the engine will die. It always starts fine though. Once you are driving it generally runs just fine at low or high speed. You can generally set the cruise control on the expressway and cruise right on. However, sometimes all of a sudden the truck will start bucking and jumping as if it has a terrible misfire. It usually lasts a few seconds and quits. Often if you step on the gas it quits. Even less occasionally the engine will begin to slow as if it is starved for fuel and slow down. You can press the pedal to the floor and it sputters a bit then picks up and runs fine.
I have read about all the threads in this forum and others and tried some of the suggested fixes but it still has the problem. I have tuned it up with new plugs, wires, fuel filter, air filter and PCV valve. Based on some of the forums advice I have replaced the IAC valve, the EGR valve and EGR Pressure Feedback Sensor, and cleaned and inspected the MAF sensor with MAF cleaner. I have checked all my vacuum lines and no leaks there and checked the engine timing which is fine. Fuel rail pressure and engine compression are also fine. Spark plugs show no clues, exhaust is clean and the engine uses virtually no oil. There has been no tear down on the engine like removing the heads, cam, timing gears or any of that and the engine is completely stock.
It shows no codes related to the problem. Two or three months after the problem started I showed a code that indicated an injector problem, traced the problem to a bad injector, replaced the faulty injector and it was fine. That took care of that code but didn't solve the idle problem. In my younger days I was into drag racing and I rebuilt engines, swapped transmissions, etc. and still do my own tune-ups today so I am fairly familiar with auto repair and have most of the tools for testing newer cars but this one stumps me. As a last resort I'm about to take it to the dealer.
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I have a 6 cylinder '99 Ford E150 and though it has plenty of oil, the oil pressure gauge drops and the idiot light comes on whenever it stops and comes to idle. Pressure seems fine when driving but dips at a stop lights etc..
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2004 F150 5.4 3v. I bought the truck with 102k on it, it now has 124k. In the morning, when the outside temp is between 30-50, the engine starts and runs fine. When I get to the first red light ( about 1 mile away) within seconds of the engine at idle, engine starts to run rough and CEL. Every time the code is p0351. If I let it sit in the driveway to full warm up... no problem. If I start the truck, shut it off and restart...no problem. It only happens at the cooler temps. I have changed plugs, used motorcraft, nickel antiseize, torqued, etc. Ford changed the coil, I have changed the coil, cleaned MAF. As soon as I cross the intersection, light stays on, rough running clears up, and runs like a champ for the rest of the day.
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I got an old 1989 F-150, manual, in-line 6 engine, with an 8-foot bed. I use it for hauling landscaping equipment, as i am starting a business. i will likely start hauling trailers with it this summer, but I also just want the engine to give me more power.
What are some things I could do to up the HP, or a better truck in general. I'm not looking to make it into a 350Hp monster, just get a little more out of it. What can I replace or add that would do this?
First, the idle dies on me when i put it in neutral, or gets stuck at 2500rpms. is this a vacuum leak, or the idle-air control valve?
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I have Subaru B9 Tribeca 2006. Week ago started the following problems - after starting up, engine is shaking (rough idle) for a few (20-30) seconds and then it's OK. Then I got Check Engine, Cruise and ABS lights on. Diagnose shows mistake in 1st cylinder. changed spark plug, air filter, checked all connections, cleaned injector and throttle. Lights went out and engine was working as new. but the second day car had rough idle again....
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I have a 2001 Ford F150 Lariat. It has the 5.4L Triton motor. I was having starting problems as such the truck would crank and not start or crank, start and barely idle and stall within 5 seconds. It was NOT tripping any lights. I was told it was a possible fuel issue. I have since changed the fuel pump, fuel filter, as well as the hoses in the rear connected to the tank. Truck started, ran great, even seemed to have more power. Ran great for about a week. I was on my way out yesterday about 2 miles from home when the truck just stalled out on me. It is now having the same issues it was having before I changed the pump, filter, etc. What the issue may be? Clogged line? Fuel injector? If it is an injector how can I tell which one?
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I have a 2000 F-150 5.4 L. I was driving from home and seconds after the engine went into a rough idle that wouldn't let me accelerate. I scanned it and gave me multiple transmission trouble codes, about 15. I checked the wiring, the transmission fluid and it all looked good. So, what could be the problem?
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Bought the truck knowing it needed a little work because it sounded like a diesel when running. So I had the timing chain, tensioners, water pump, etc. replaced and that fixed that problem. Then, a couple days later, a spark plug blew out of the engine. So, I go to do a full tune-up to find out that 3 of the 8 cylinders already had heli-coils in them.
I pulled those three and bored out and re-tapped the cylinders using the Cal-Van inserts. This has worked beautifully so far. I also replaced all of the other plugs as well with double platinum plugs. I also replaced all COPs. This got the truck running again and it drives great. No loss of power whatsoever. It just runs like a dog at idle. As soon as I give it throttle it smooths out completely.
It seems like the problem gets worse as the engine starts to get up to normal operating temp. Basically, if I am idling, in gear or in park, the truck shakes pretty bad. It kind of feels like it's starved for fuel or barely missing. I do not have any codes though and if it is a miss, it is completely gone under throttle.
Other things I have replaced within the past couple of weeks:
EGR
EGR vacuum solenoid
DPFE
Both PCV elbows
PCV valve
Air filter
Harmonic balancer
Other things I have done:
Cleaned IAC
Cleaned throttle body butterfly (including EGR ports)
Checked TPS voltage
I'm sure there are other things that I am forgetting.
The idle seems low to me but I'm not sure what is considered standard for the 5.4l. Mine idles around 600 in park once engine is warm and the needle doesn't move despite the roughness felt. Just going by the tach, you would think that the idle was smooth as silk.
Truck info:
2000 Ford F-150 XLT
5.4L V8 2V
150k miles
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I've got an issue with my 92 2.3 ranger.... sitting at idle for 30 or so seconds it starts to chug and sometimes dies.... I can hit the throttle and its fine for another 30 or so seconds.... while cruising on the freeway after about 30 minutes it starts to cut out badly... let out of throttle for a few seconds and it clears up and drives fine...
Here's the part that has me confused... pulled codes yesterday using a innova scan tool...
koeo were 4, 10, and 538...
koer were 111, 10, 157, 158, 181, 327, 328, and 334....
How does it give me a 111 pass code and then still come up with all the other codes? I am thinking my ecu may be screwed.....
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I am having a problem with my 1997 f150 4.2 v6. The engine is running rough at idle and while driving. It's running so rough that it vibrates the entire cab of the truck. I found water in the oil when I was trying to fix the problem. I have since had the heads redone and replaced all of the gaskets thinking this was the reason for the rough idling and rough driving. It wasn't; doing this fixed the water in the oil but still I have the rough running engine at idle and driving.
I have replaced the EGR valve, plugs and wires, pcv valve, replaced the coil pack, fuel filter and air filter (everything has been replaced with ford recommended parts because I have read that the engine I have doesn't like after market parts). While driving the engine vibrates and sound as if it's going in a cycle in a rhythmic sort of way (like a washing machine goes in a cycle), best way I can explain it. I have come to the end of what I think it is?
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2001 5.4L 4x4...Engine bought from reputable junkyard with 140K has new manifold studs, motorcraft spark plugs, and 8 coils (bought on Amazon).
No check engine codes...checked for vacuum leaks...And has rough idle.
Is there a reason it might have rough idle aside from blown motor? The mechanic was going to take it to get computer reflashed but not trying to throw money down the drain...
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1999 F250 LD with 5.4 w/ 225k miles... Was running perfect yesterday when I shut the engine off. Started back up about 20 minutes later and Idles was up and down and rough.( 400 - 900 rpms) Drove and ran fine except Idle. I know that those codes are for the o2 sensors but don't believe they're bad. I hear what sounds like a vacuum leak somewhere behind throttle body. Either IAC or EGR or it could be coming from the line that runs in beside the IAC valve to the air intake in front of the throttle body. Tried spraying water in those areas with no results. Could it be a bad EGR valve or a stuck IAC valve? I have also noticed that lately when I start the engine the engine rpms go up to 2k before dropping down. Would a bad IAC valve cause such rough idling along with the codes that I described?
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I have a 2001 f150 5.4 liter 2 wheel drive super crew that idles rough with surges in the idle. Weird thing is it only does it when it's 55 degrees or below. So it's fine now in the heat but winter is coming and the colder it is the worse the idle. Replaced maf sensor.
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I started out with my 2000 F150 with a 5.4 V8 running rough at idle. It would idle way down slow and then rev up a little over and over. On a couple of occasions it would even die when in drive or reverse. I did finally get a Check Engine light so i put it on my diagnostic program to see what was up. Here is what I got:
P1151 Lack of HO2S21 Indicates Lean
P0171 System Too Lean Bank 1
p0174 System Too Lean Bank 2
After doing some reading up I checked all my vacuum hoses and cleaned my mass air flow sensor. I then got the same codes again after a few minutes of running. So I went to the next thing that was recommended, the upstream bank 2 O2 sensor. After changing it the truck ran fine for a couple of days, no issues. Then all of the sudden it idled a little funny again and I got a Check Engine Light again. This time:
P0171 Bank 1 Lean
P0174 Bank 2 Lean
P0300 Random/Multiple Misfire
I reset the light to see if I would get the same again later. Before the light came on again I filled my truck up with gas and it seemed to be running pretty good again. Then a day or so later it set the light again. This time:
P0171 Bank 1 Lean
P0174 Bank 2 Lean
P0136 O2 Circuit Malfunction Bank 1 Sensor 2
P0156 O2 Circuit Malfunction Bank 2 Sensor 2
P1131 Lack of Switches HO2S11 Lean
P1151 Lack of Switches HO2S21 Lean
I went ahead and drove for a few days as it had gotten really cold here and I didn't feel like messing around in my shop since it isn't heated. A couple days ago I needed gas so i filled up again. Suddenly the problem was gone again. Truck ran fine idled fine no missing or odd idling at all. That lasted a day or two before it started acting a little weird again. At that point i was down about 1/8 of a tank from full. I have read that there can be issues with the fuel pump.. I am kind of wondering if that may be it now. But I haven't had to deal with this sort of issue before so I am unsure what to check next. The truck always runs fine off idle, it only seems to have the issue when it is idling. I had reset the codes the last time and i have the light on again now. I haven't checked it yet but I am sure it is going be some combination of what i have had in the past.
I have read that the IAC valve can be an issue as well. I had a problem with mine sticking a couple years ago and when it would do it you could just tap it with a wrench and it would idle up. But it never died like it does now and it would also idle a lot slower than it does. Back then I cleaned the valve and had no more issues with it. The truck has always had times when it would act weird at idle usually after slowing down after being at highway speed. The current issue happens at all temps cold or hot.
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My trucks symptoms include a illuminated service engine soon light, sometimes a high rpm idle, and sometimes a rough erratic idle. When a scan was done it indicated the oxygen sensor was defective. The issue is: which specific one (there are multiple oxygen sensors) or how could I check or determine the faulty one for sure. I am trying to economize and replace only the bad one myself if possible. I own a good multimeter, can it determine the bad one? 1999 F-150 4.2 Litre V6 oxygen sensor dillemna....
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Went to start this 5.0 TC after it sat idle for a week, and it died within 3-4 seconds. Further attempts resulted in similar response. After some initial checks, I was able to keep the engine running by manually depressing the IAC plunger into the barrel. The engine ran fine as long as I could hold that, but stall immediately after release. Codes: TPS out of range; HEGO HO2S sensor out of range-always lean. Bought a new TPS no change.
Today: With the key "on" and engine off, the fuel pressure is a steady 38psi. There is an air release button on the fuel gauge line and when I pushed that, the gauge pressure dropped to zero and does not come back (until you key off and on again). I removed the IAC from its mount and with the key on--I observed the plunger move inside its body--guessing maybe 1/4 inch. I casually checked all the engine management items I see in books and looked at vacuum hoses and couldn't see anything amiss (also climbed on top of this engine and checked the rear--PCV lines etc.). I removed the fuel regulator vac line and observed no fuel leakage there.
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