Ford - Explorer :: 2000 Won't Idle When Cold / Hard To Start And Keep The Engine Running
Aug 31, 2017
I have a 2000 Explorer W/4.0 SOHC engine. With summer nearly over and fall on the way, I need to figure out what is going on with my engine. This problem has been going on for the past 2 years. As the outdoor temperatures get cooler, the harder it is to start and keep the engine running. This starts happening around 65 ambient temperature, and gets worse as the temps drop. By 30, I can barely keep the engine running.
Odd thing is, all I have to do if the engine starts is, keep my foot on the pedal to keep the engine around 2000RPM, put it in gear and start driving. After about a mile or two, the engine runs normally, and will do so the rest of the day. So far I have cleaned the air flow sensor, replaced the IAC, replaced all the injector "O" rings, and cussed a lot. I smoke tested the engine and the only vacuum leak is a very small one at the EGR valve.
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My daughter has a 2000 accent , SOHC 12V, I think it's the 1.5L.. It will not stay running when the engine is cold...........after it warms up, or if it sits in the hot sun it's fine................it has 166K .
She said she took it to an auto parts store and had the engine code read, p1123 came up.....
Code P1123 : Long term fuel trim, at idle - mixture too rich..
What do you think this is caused by................ the inlet air temp sensor? I was told someone just replaced the air max flow sensor, that don't sound correct to me, but that's what they called it....probably the MAF sensor....
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2000 Explorer with the 4.0 SOHC.
It starts fine under all conditions but when cold, like in the 30s or lower, it doesn't want to remain idling, yet no CEL comes on. New fuel pump. The throttle body is cleaned, as are the injectors. It runs super once it gets past the cold startup issue.
I was thinking a sensor is getting weak but not weak enough to set the CEL.
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I have a 2005 Ford Explorer 4wd with 4.0 SOHC 6 cyl Flex Fuel. For months the vehicle has idle rough and increasingly becoming difficult to start. I decicded to replace the spark plugs and wires hoping to solve this issue! gap set to 052. When I started the vehicle it went into engine fail safe mode and wrench light came on. I then replaced the TPS on the throttle body and had no diference (I may have installed incorrectly! when I put it on the armature felt like it broke free inside the sensor). DTC codes read P0223, P2106, P2110 and with P0122 pending, P0223 pdg, P2106 pdg, & 2110 pdg.
With the old tps installed and wiring harness disconnected the truck will start in fail safe mode, but will not start at all with wire harness connected. A volt meter reads at computer end of wire plug 3.69 volts at pin one (gray/red wire +) and pin three (gray/white wire -) with key to on but not running.
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I'm a diesel mechanic and know my way around Powerstrokes, this 4.0 is not what I would usually work on, but I have a friend who has 2006 explorer 4.0L SOHC, someone told him he needed a motor with out explanation why, so I didn't want to see him get ripped off. The problem is it idles very rough, hard to start, and stalls. There's no DTCs , if you hold the accelerator slightly it will stay running, but once you let off it will either idle really bad and misfire or cut off, once pushing the accelerator the rpms raise very smoothly up til 3500 which is what I assume the rev limit is in nuetral.
I've done checks with focom and forscan, I was thinking possibly a bad fuel pump, while monitoring fuel pressure I see a range of 289 - 326 kpa with 26% fuel pump I guess duty cycle would be the correct term(once again I'm a diesel guy, and use to dealing with IPRs and Hpops) not sure if the desired fuel pressure is relevant on these but it always stays at 269kpa. I believe that equals out to 40-48psi while I believe this system is supposed to have somewhere in the range of 60 - 70, but I wouldn't expect to get a rough idle with no load with almost 50 psi of fuel pressure.
So with no DTCs Im baffled, and don't want to start wasting money just throwing parts at it. I've thought everything from fuel pressure sensor, to coil pack(replaced 4 months ago) to crank and cam sensors.
I did end up getting a code p106, but I believe this is because I didnt tighten the intake hose after checking the throttle bottle, I just slid it back on. out of the 4 days of testing first time I seen a code pop up besides unplugging some sensors here and there to make sure the pcm would actually register a dtc.
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The other day I went to turn off my vehicle and it continued running even when key is in off position. I took the key out and it still continued running. I had to disconnect the battery and turn key in on position for vehicle to stall. I do not want to buy any unnecessary parts nor do I want to take apart any unnecessary components.
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The other day I went to turn off my vehicle and it continued running even when key is in off position. I took the key out and it still continued running. I had to disconnect the battery and turn key in on position for vehicle to stall. I do not want to buy any unnecessary parts nor do I want to take apart any unnecessary.
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I have a 01 7.3 crew cab dually and it's had cold start problems since i got it in 09.I have replaced everything i could think of including glow plugs gpr,harness and batteries. Any temp below 40 i have to plug it in . If i cycle it 3 or 4 times it will start but it smokes and runs ruff. My 00 7.3 excursion starts up down to about 10 degrees than i have to plug it in so i know dually is not right.
I have a afe intake,1.5 injectors, driven diesel rr, adrenilin pump,dp tune by gear head. Kinda at wits end don't mind plugging it in in dead of winter but now one night it's 30 next it's50 and i don't have to . Also have fully built trans by level 10 if it matters .I get battery light coming on every now and again. New alt about every year and a half.
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20 degrees out this morning truck not plugged in, didn't want to start had to cycle 4-5 times, each time waiting for glow plug Light to go out.
Finally cranked didn't sound pretty but cranked. Once it started idling on its own got out and seen a puddle of oil under the front of the engine drivers side center kind of.
Got up on the truck and shined a light in the valley and seen a puddle in intake valley. Heres my question? Where did this oil come from? Once it warmed up it quit and oil kinda disappeared from valley???
I had turbo off a few months ago because I thought I had a bearing down in it, but found some bolts lose. When I put turbo back on I broke the wire plug on front of the pedestal so I just left it unplugged. Very hard to cold start now that that is unhooked.
Did leaving this unhooked create a hard cold start? Should I put another pedestal on it with the plug or install one without it? Also will it hurt to leave plugged in overnight?
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I have a 2000 Kia Sportage which has been having troubles starting when cold and I'm not quite sure as to why. In January of 2012 I had to replace both the Battery and Alternator in this car because they were both bad. I bought the alternator from O'reilly Auto Parts and the Battery from Walmart. Once I replaced both the battery and alternator last year things were fine up until recently when I discovered that my car would not start. I did not leave anything on that could have drained the battery, but it acted as though the battery was dead.
I had to get a jump start from someone and go back to O'reilly. They tested the battery and the alternator in the car and it was concluded that the alternator was bad. I exchanged that alternator because it was a limited lifetime warranty and put a replacement re manufactured one in straight out of the box and got a jump start again because the battery level was down.
Things were working great until after I went to a couple of stores and was heading home. I heard what sounded like an electrical pop and then immediately after that the car started acting up again. When I got home I left the car running and put my multimeter on the battery to test it while it was running. It read 11.8 Volts while running. I went back to O'reilly and swapped that alternator out with another one.
With the first battery and alternator the readings that I was getting while cold was 12.1. After the first replacement alternator was installed it was reading 14.0 while running before the pop sound. After the pop sound it dropped to 8.60.
With the current replacement alternator it is reading between 13.3 to 13.6 while running. While cold it is reading between 12.2 and 12.4.
Are my readings normal or do they indicate a problem? It was suggested by one parts guy that there might be a drain on the system, but at the moment I can't figure out as to where a drain might be coming from. It was also suggested that alternator connectors might be faulty on the car itself.
When the car is idling and running it sounds like it's a bit erratic. I did replace the Ignition coils in 2007. How would I determine if there is a drain on the system and if there is a drain on the system where it might be coming from?
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I have a 1999 Explorer with a 4.0 engine and when it gets cold it has trouble starting. It will click for a while and then start, but when it is warm I have no problem starting it.
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I have a 2000 Honda accord and in the cold it has a hard time starting. It will turn over but it is like it is not starting right away. I also notice there are times when it starts to turn over but then it dies out.
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I have a 2002 Explorer with 147K that makes a chirping sound when I start it and the engine is cold. So far I have replaced the serpentine tension-er and the water pump. After about 10 minutes of running the noise stops. With the belt off the idler pulley spins freely. It does have the original power steering pump.
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My wife's 2000 explorer with the ohv 4.0 has trouble starting when cold outside. No problem in summer. The engine turns over but never catches. Eventually, after 5-10 min, it will catch. Sometimes we have to trun the key all the way off, not just acc, to make it start. Had battery checked, and was on the "low" end for cold cranking amps, but the engine doesn't lag like a dead battery would. Last winter we replaced a gasket on the upper part of the engine thinking that it wasn't flexible enough when cold outside and was getting the air/fuel mixture wrong. No check engine light. I think that covers everything.
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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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I have a 1997 explorer sport 4x4 4.0 sohc It has a real tuff time with cold starts sputters won't hold and idle sits at about 500 rpm once its warm its not as bad still has a low idle.
Also i have a constant engine rattle thinking left front cam tension-er
Also throwing and check engine light odb scan tool shows o2 sensor position two is bad
I was thinking intake gaskets and new tension-er is a good place to start.
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Truck runs great if I get it started. Here are symptoms.
-Extremely hard to start when engine is cold
- It will start fairly quick if plugged in all night
- After running there is no issues with starting unless sits over night
- Batteries good and engine cranks fast
- Tests and parts I have replaced
- Replaced GPM (Glow Plug Module) I do not have the relay as most seem to have on their engines. I did replace this unit.
- Replaced Glow plugs all 8 this morning. Since they where cheap enough it did not hurt the wallet.
- Replaced crank position sensor. Tach moves when engine is cranking.
- Checked the HPOR and it has oil about 1/2" from top.
Now what is left to check besides doing a buzz test to rule out injectors? Also if truck runs fine and does not run rough could injectors still be bad?
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My 2000 F-250 6.8L V10 has a choppy idle during the first 30 or so seconds after a cold start up in the morning then it smooths out and drives perfectly. If I were to place the truck in gear during the choppy idle, it would not die and throttle response would be fine.
I cleaned the MAF sensor and checked the PCV elbow for cracks (no cracks). It idles at about a 1000 rpm during a cold startup then drops to about 750 rpm according to the dash tachometer. The truck has 187,000 miles on it.
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I just got a 2000 passat wagon with a 1.8t and tiptronic transmission. The questions is when it is cold the transmission has a hard time to start driving. But as soon as it is warm it drives great. It is throwing a check engine code havent checked it yet.
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I'm new to diesels. I just bought a 2004 F250 with the 6.0 V8. I have the high and low circuit, contribution codes on cylinders 4 and 8. I've only had the truck for a few days but I've been reading a ton. The symptoms are hard start, rough idle/shaking, no power when cold. When it heats up and I'm over 2000 RPM it seems to be just fine. Even when hot and below 2000 RPM it does ok. I've check the FICM. It reads 48V with key on and 48V running. My plan is to do the following:
Change the Fuel Filters
Change the oil filter
Change Air Filter
Change oil with 5-W30 synth and I have both Hot Shot/Rev-X
If that doesn't work, I'll replace the two injectors. How does that sound.
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2003 F350 7.3L 164k miles. Got towed in with hard to start cold complaint.
Hooked it up to the Snap On Verus Pro scan tool and we get up to 3000 psi on the ICP cranking, IPR value seems within spec, we have rpms over 100 on tool, pulse width within spec, computer voltage above 10v while cranking, verified output of glow plug module (California) and glow plugs get voltage for approx 50 seconds @ 80 degrees farenheit, glow plugs all read 0 ohms resistance.
injectors do NOT sound the same during buzz test.
Vehicle takes EXCESSIVE cranking cold to eventually get it started. LOTS of cranking. Just had to replace starter and a battery because driver burned em out. It feels like the vehicle shakes when it gets running. Black smoke when revving cold. Sometimes white smoke while cranking.
Once the engine has been warmed up, it starts perfectly every time.
I have spent two days in the engine bay looking for chaffed wires and doing diag and my current diagnosis is bad injectors. I feel there COULD also be high pressure oil leak, or a mechanical issue such as low compression. No compression guage yet for this truck. We have the ICP and IPR fittings to do a shop air test. Recently did a 6.0L and went thru everything and eventually diagnosed it as bad HPOP. LOW ICP pressure.
I noticed two of the cylinders were at maybe 8% Perdel on the data. Seems too high. Also, it "passed" the KOER self test and "passed" the injector buzz test with no codes after, but the audible sound of injectors didn't "seem" right to me, but I am new to these engines.
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