Ford F-150 - 1997-2003 :: Rain Causing Misfire / Truck Loses Considerable Power To Accelerate?
Apr 18, 2013
After/during the rain, every other time my truck loses considerable power to accelerate. It's not consistent but happens increasingly often. As I accelerate up to ~ 50km/h (also when I reverse), my engine will shake the entire truck. Past 50 it "appears" to go away. Typically this will last up to 10 mins and will disappear and run fine again. The last time it happened the check engine light came on and went away the next day. After reading online, I've heard about the "COP" connection??
2003 Ford F-150, 4.6L Triton V8 XL, 2WD
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I have a 2000 f150 xlt 4x4 with a 6" suspension lift. Recently Ive had some front end noise, so after swapping out a lower ball joint and the sway bar links, i still have the pop. It only happens when at a stop or slowly moving and i turn to the right and accelerate. It sounds like its coming from the front drivers side. I have wiggled everything in the front end and everything is very tight. The only loose things i can find are:
1) Bottoms of shocks can be wiggled back and forth, both sides do this.
2) driveshaft leading to the front end has a lot of play, but I don't believe that's relevant since its not used when I am in 2wd.
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My issue started as simply a lack of air conditioning. Upon initial inspection I noticed that the compressor clutch is not engaging when I turn the ac on. So I figured the next step would be to see if I am getting voltage to the clutch. My Chilton book says to test this with the truck on, so I disconnected the harness from the compressor, attached my meter to the cable, and attempted to start my truck. I've found that the truck wont start with this cable disconnected. It will turn over but just never starts. Also the fuel pump comes on as it should.
I've repeated this several times. It always starts with no problem when the compressor clutch is connected. I understand that there is some monitoring circuit with the pcm so maybe that has something to do with it but I'm pretty fuzzy on how that works. Upon further inspection, it looks like I should be able to test my ac signal with the engine off, so maybe that's not such a big deal, but this whole truck not starting business is blowing my mind.
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I have a 1998 f150 w/ the 4.6L V8
For months I have had a hesitation in this truck when i go to accelerate, and at times you can even feel a little buck with the cruise set at 70MPH. It has gotten worse and worse. When i start pulling a trailer good luck, it will do it but its terrible, hesitations and misfiring,
There is always a misfire/hesitation. Will Idle nice After its warmed up. Sat for 2 weeks fired it up and it had a HORRIBLE idle for at least 1-2 min. This is new now it wont idle when cold. Now I had one code Cylinder 4 misfire, cleared the code never came back 2-3k miles later still not back on -
replaced coil packs
New plugs
New wires
Fuel pressure test good
Checked the Heater hose - not leaking and nothing in the hole.
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So my truck started to intermittently misfire about a month ago . I changed the spark plugs wires at first and it seemed to get better but it still had a misfire . I replaced the spark plugs and ignition coils and the misfire is still there . Up until the other day it was a noticeable issue but still drivable with . On my way home from work it got alot worse and started to misfire any time I tried to accelerate and now is noticeable at idle now as well.
I checked the fuel injectors resistance and they are about 14.8 ohms . I am not getting any codes for a misfire . I tried to pull the fuel injector connectors to try to find the source of the misfire but could noticeable change in engine rpm. Where to go from here and what I should check first? Would a clogged fuel filter cause something like this ?
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Took the beast out for a good road trip to try out the new tires. She is running good now, but has picked up a weird miss which cause the truck to shudder. It does feel and sound just like a miss, I know that it is a diesel but that is only way to describe it.
When driving along with the cruise set at 75, when I hit a hill, the truck will gradually accelerate, and it will miss a beat. Just like you turned it off and right back on very fast. Usually once, twice if the hill is long. If I accelerate harder it will not do it. Most often does it while gradually moving accelerator.
Has new fuel filter ad cam sensor.. Runs great the rest of the time.
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Ford F150 1999 5.4 XLT... I've had this truck since may 2013 from the 2nd owner who only drove it
occasionally to make sure it ran. For the last 5 weeks there have been two occasions where my service engine light appeared...once on 12/28/15 and again today. Both read cylinder 4 misfire. Upon searching this piece which I'm assuming is the boot that covers or houses the spark plug is very unsecure and causes a shaking feeling as I accelerate or idle. Being so far back I can't reach it with extensions on a ratchet and barely fit my hand back there. Having to consider taking it into a shop for further analysis and repair but I'm trying to save as much money as possible as I am in between jobs since mid January. I have a picture attached...
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I own a 2000 f150, 7700 with 199,000 miles, 5.4 eng. In drive with foot on brake, it idles at 600 rps, fairly smooth. When I accelerate from a stop the engine shudders. Ten months ago I had the plugs replaced, last week I bought 8 new coils and I installed them, no change. I removed the down stream o2 sensor from the exhaust, it was as clean as blued gun metal. Can these 2 sensors be cleaned or tested? The service engine lite is not on. List of things to check?
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I am first time ford owner of a 2003 ford f150 super crew fx4 with the 5.4 Triton and lately when I accelerate hard and it down shifts. It shifts excessively hard or when your going slow and the have to accelerate it also shifts really hard i dont know if it is the diff the U-joints or if its the transmission.
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I was involved in a light accident over the weekend. I was hit in the rear by a Prius which didn't do body damage except for the 7 blade harness for my trailer towing. But, now the truck has a random misfire code. You can feel the truck jerk when you go up any grade. We changed the fuel filter and dumped in some cleaner already. One guy says its fuel and one thinks its coils. It is a 2003 F150 extended cab 5.4 with a nearly new motor. The truck has about 175xxx on it and I have had it for about 40xxx. I have not changed coils. We did check the inertia switch on the passenger side and it was not tripped.
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My truck was jerking like it had a misfire, so I talked to a few people on here and they said it could be a bad coil on plug and some said it could be a spark plug misfiring. I put all new Motorcraft plugs and boots in and the problem of the jerking and possible misfire stopped.......until now, its back! The check engine light has never come on and this problem is getting ever so annoying.
Could it be a dirty fuel filter? Can a coil be bad and not throw a code for the check engine light to come on? Something in the EGR? The problem persist at 1000-2000 RPM's mainly.
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We have replaced 4 fuel pumps on a row.
Voltage is good...even ran a fresh circuit.
Ran new supply lines
But, can't seem to understand the continued drop in pressure. It usually takes about a day of driving to crater after a new pump/filter is installed.
It never dies, just loses power and drops the truck to an idle. Funny thing...if I shut the truck off and turn it right back on...full power for a short period!
The truck is used on a ranch that has plenty of rough roads...thought inertia switch maybe but i believe that would stop fuel completely right?
I am totally stumped and so is the mechanic.
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I've got a 97 f150 4.6 that has randomly started missing over the last month. It has started to get more frequent and codes are showing a misfire on both cylinder 1 and 8. Both of these cylinders run off the same coil pack. I'm thinking its the coil? The plugs and wires, motocraft, have about 3k on them and the truck runs great otherwise. I just don't know how common a coil would cause this or if they would act intermittent like this.
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I have a 2001 F-150 4x4 SC with a 4R70W. As a a couple weeks ago the transmission (or so I think) is slipping. When I take off from a red light the truck is shuttering. I also can be driving along at 55-60 mph and the truck jolts and shutters. I was reading some other threads and some guys think it could be a misfire, but since mine does it from a stand still i don't think it is. Just throwing that out there because it could be a factor, but once again I don't know.
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This morning on my drive into work I discovered that when trying to accelerate while moving at ~60mph or more the car would shudder and experience a lack of any power at all. If I continued to press down on the accelerator the car would continue to shudder and it would get worse. It felt like an engine stall shudder but constant. If I was below 60mph are tried to accelerate I had no problem, I could continue to accelerate all the way to 70mph, then I would have to slow down for traffic. However after cruising above 60mph and then pressing down on the accelerator I would experience the shuddering. I experienced this issue suddenly with no gradually increasing issues at all.
Car Details:
1993 Ford Escort Wagon LX 1.9L SEF I64K miles
Recently replaced oil, about 2wks ago
Air Filter fine and unobstructed
Car has been getting about 36mpg
Exhaust was replaced about 1 month ago and is unobstructed.
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I have a 1997 Dodge Neon with about 153,XXX miles on it. My check engine light has been on and i know that is caused by a random misfire. But more recently i went to start my car and it started but ran for less then 10 seconds and died. I tried to start it again and it wanted to but wouldnt make the final step i guess. We checked my spark plugs and i had oil sitting in 3 of the 4 there are. We have tried starting it again after cleaning the oil out and it started on the first try, I am just afraid of messing anything else up so until we figure out why it did this to begin with the vehicle is off limits. My Fiance said we need to replace the spark plugs and a gasket.
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My wife has a 2002 Saturn Vue with the 2.2L 4cyl engine and a manual transmission. Yesterday she started it in the morning and backed out of the driveway. When she put it in first gear and tried to accelerate, the engine lost power and the car crept along around 5mph. The SES light came on as well. She took it to Autozone and they plugged it in but did not get any codes from it. I disconnected the battery today for about an hour, reconnected it(thinking it might be a computer issue?) and then test drove it and got the same result but this time without the SES light. The engine revs just fine out of gear or when in first gear and not trying to accelerate. It seems to only lose power when under load. I'm lost.
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So about 3-4 times per day, my truck will accelerate very quickly with the slightest touch of the gas pedal, then followed by the service engine soon light...I checked for any codes to see what I may need to fix, but no codes are found.
What this could be? I am also having issues to where I a few times per day I have to put my truck in neutral to get it to start instead of in park...could the two be related?
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2006' screw, 5.4L, 116K miles ... The truck looses power at highway speeds to the point that I need to pull off of the road. When this happens the check engine light is on and the truck is still running but will not accelerate, is it possible the computer is going into limp mode and if so what would cause this?
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EGR marbles -- the chunks of carbon that come loose from the EGR cooler / intake manifold and stick the EGR valve open?
I've been getting these on 3 recent occasions, maybe 100 miles or so apart. The truck loses pretty much all power below 2000 rpm, smokes and stinks bad until I pull the EGR valve and dump these out. I'm trying to decide if I need to dig in and do a new EGR cooler and oil cooler. I've read the FordDoctorsDTS article suggesting these are caused by and coming from a leaking EGR cooler (possibly only when very hot) over time.
I'm not currently losing any coolant that I can tell, but was losing some a few months ago (during warmer weather), but also had a leaky heater valve that I replaced at the time. Not sure if the leaky valve would account for the total coolant loss (I lost over a gallon in a few weeks).
Here's the additional details:
- 2004 Excursion with just over 109K miles
- Replaced faulty EGR valve (was sticking open) about 300 miles ago
- Replaced stock turbo with new powermax turbo 300 miles ago. Old was rusty and pitted with sticking unison ring.
- I just did a total coolant flush, oil cooler back-flush, Restore and Restore+ and added new coolant filter
- Replaced thermostat during coolant flush. ECT stays pretty close to 190 degress when warmed up.
- ECT/EOT delta is mostly between 15 to 18 degrees, sometimes slightly lower or higher. Not much change after the coolant flush, but may be slightly improved.
- I've been doing pretty regular wide open throttle tests during recent test drives with the new parts above (I'm thinking this may have broken some of this stuff loose).
Here's today's marbles. They're all dry and will crumble if crushed. They are dull gray on the inside - not metallic as they kind of look here............
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I have a 2001 250 Super Duty. I am having an intermittent issue with the electrical system and transmission. I don't drive this vehicle very much so it sits for 7-14 days at a time.
Previously I had the od light flashing and had the transmission solenoid replaced. A few weeks ago I decided to drive it to the corner store. As I arrive home the od light starts flashing and the transmission starts shifting funny. I pull into my parking spot and turn the truck off. I sensed the shut off was weird so I tried to start the truck. NO POWER! None! I go back to the truck a few days later and it starts up without an issue.
Approx. 20 miles later it starts again. This time I have to jump the battery. I ran the truck and it drove without issue. Again a couple weeks later it starts in again with the light flashing and electrical dying. What it may be? I'm probably going to get rid of the truck as I can;t justify to myself to keep dumping money into it.
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