Ford Escape / Hybrid :: 2002 - Cylinder Misfire When Hot And Restarted?


Aug 21, 2012

I have a 2002 Ford Escape, 6cyl FWD... 110,000 miles.

About a month ago I started seeing a misfire, which of course usually is a COP issue. I should buy stock in whoever makes those. Anyway, the code according to parts store monkey was cylinder 2 misfire, so I replaced the COP. That made no difference. I also replaced the upper intake gaskets and the PCV valve while I was in there.

So I started monitoring when it would happen, and of course got the actual code rather than taking the word of the monkey at the parts store. The code is P0352 Primary / Secondary circuit malfunction.

So after some research I find it could be the harness, it could be the PCM. The question I have is this misfire seems to only be when the motor is started after it's hot. What I mean is I can drive to work 10 miles, no problem. I can drive to Orlando 100 miles away - no problem as long as I don't stop on the way. The only time the misfire happens is when I start the motor when it's hot. So if I drive 10 miles to the store, then drive home before the motor cools completely I'll be coming home on 5 cylinders. If I wait 2 hours between stop and start I never have a misfire.

Does that jive with a true electrical problem? I'm no expert, but I don't understand why driving for 100 miles is fine, but 10 miles, stop start and 10 more is an electrical problem.

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I already change the gasket i buy the felpro Kit, and i Also replace all the sparks and spark plug boots, I clean the air sensors and i also replace the EGR, i try to switch cables, and all is the same the car start buy when i accelerate it just go off, i don't know what can i do next, somebody told me to change the fuel injector, i take the pressure in both spark holes the number 4 was 150 and the 5 and 6 was 120, No leaks oil. My car is a Ford Escape 2002, XLT 3.0 4x4

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I have a 2009 Escape, 2.5l engine and manual 5 speed transmission, 205,000 miles. It has has an intermittent miss that has been getting gradually worse over the past 3 months or so. I've been seriously futzing with it for the past 2 months, so far no luck. Definitely worse when it's cold. Not noticeable at all in gears 1-3 (even when cold), noticeable in 4th, mostly between ~2000-2500 RPM, and pretty bad when cold in 5th in the same RPM range, still noticeable when warm. No service engine light until today (#1 misfire).

If I let the vehicle idle for 10 minutes or so, the miss is much less noticeable. Replaced the plugs, absolutely no difference. Bought one COP and cycled through all cylinders, no difference. Finally broke down and took it to the Ford dealership where I bought it new and had them do a power balance test, which isolated it to cylinder #1. Swapped the #1 and #2 injectors and took it back to Ford, still showing cylinder #1. Did a compression test, #1 and #2 both around 165lbs, #3 and #4 both around 185lbs.

I'm a electrical engineer, so I spent some quality time with an oscilloscope to compare the drive waveforms of the #1 and #2 cylinder COP and injector...both COP and injector drive waveforms look identical when comparing to #2 cyl. Tried heating the PCM, made no difference (engine was cold, PCM was hot).

So it finally DID throw a code today, cylinder 1 misfire. I'm thinking I can almost hear a miss at idle now. And listening to the valvetrain at idle, there is unmistakably more valve noise coming from the #1 intake area than the other cylinders, but not terrible.

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The locksmith says the replacement cylinder needs to have those same wings for him to be change it. Is this correct? The auto part stores have the regular cylinder (with no wings) readily available, but the one with wings is a special-order item and I need this sooner rather than later.

Plus, the wingless one includes keys while the other appears to have none.

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Ford - Escape :: 2001 - Misfire On Cylinder 4 / P0304 Code

I know I can fix this problem, but my question is which cylinder is #4? I don't see it marked on the engine. The counter guys at both my local parts supply stores (whose initials are A and O) can't even look it up for me. If #4 is on the front of the engine, then it's an easy fix. If it's on the backside, then the intake manifold has to come off to get to the plugs and coil packs. It's a bit more labor. I can do it, but I'd rather not have to.

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My g/f's 2004 Ford Escape (3.0L V6 AWD 112,000mi) is acting up. After a full day of sitting, with the second half of it raining steadily, she was driving her Escape and it was acting funny (miss-firing, she said). The engine light came on and soon began blinking. She got to my house shortly after it started this. We left it and I drove for the day. Later that night, I drove it and it seemed fine. The engine light was on, but not flashing anymore.

The next day I took it my friend that was a Saturn mechanic and now working at a KIA dealership (same owner as the former Saturn and current Buick/GMC and Chevy Dealer). It ran fine for me. So he tries to scan it, his Mac Tools scanner won't read it. The KIA scanner wouldn't read it. I drove it the Ford dealer up the road. They said they couldn't get to it until after lunch, I just want the codes read. They re-iterated, and I told them to pound salt and went to an independent shop where I know a guy. They read it right away for me. "Mis-fire on start-up" & "Cylinder 4 Mis-fire." were the two codes stored. He cleared them.

She got the tune up basics (plugs, wires, air filter, etc) and did the complete tune-up herself yesterday. (I was impressed). She put 94 in the tank and some fuel system cleaner in it as well. She said there's been no change and today I finally saw what it was doing. Sometimes during idling at a stop light, the RPMs will drop to almost zero, the lights dim but so far it has not stalled. It'll do this for several seconds, then correct itself and idle normally.

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I got down there, replaced the seal (just the front side, didn't want to disassemble something that wasn't broke) and then replaced all 6 plugs and boots (with springs). Fired it up and everything seemed fine. She went to drive to work and the CEL started to flash. I read the code and there were 4 (Don't remember exactly what they were), but it was a combination of things resulting from a misfire in cylinder 4. Since it was one of the front ones. I just pulled the plugged and replaced it hoping I had gotten a dud from the factory. Nope, still doing it.

I didn't take off the fuel lines, just the air intake on the top. I did not change the coils, but everything was running fine before I changed plugs so logic would dictate it is something I did. Only seems to misfire at higher speeds. Also, her battery light randomly comes on, but the battery and alternator test good. This has been happening a while.

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Mechanic thinks it is a valve seat in the cylinder head next to the fire wall. Before I start replacing the cylinder heads with new remanufactured heads I plan on doing a compression test and leak down test.?

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Ford Escape / Hybrid :: 2002 - Trans Won't Shift Into Gear?

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Since the first time this has happened, it has happened a few more times, always when stopped, once or twice while slowing down to stop (low RPMs). Besides all that, the car shifts fine while driving.

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Anything I need to be aware of, or is this similar to changing the upper manifold gaskets?

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- 1st time, light came on at highway speed for about 30 sec and went out. Didn't come back on. Was during daytime, running DRL's, radio (no amp or subs or anything like that, and heater blower on low speed.

- 2nd time was two weeks later or so. Happened at night with just headlights on at around 55mph (RPMs about 2K or so). Again, stayed on for about 30 sec and went out.

- 3rd time was about a week/week and a half later, yesterday morning. Just running DRL's and radio. Light came on, flickered, came on, and then stayed on for a couple of minutes (all at highway speed). I noticed that if I disengaged the overdrive and got the RPMs up, the light would go out. I ran it out of overdrive for about 2 minutes like that, and the light stayed out. Speed limit dropped to 40mph, and the light came back on (lower RPMs at that speed, didn't run it in low gears). Light stayed on for 30 sec - 1 minute, and then went out on its own and has since stayed off.

I took it to Advance yesterday to have it tested, and the results were that it is charging at 13.9V under no load, and 13.87V under a load. The battery tested good, but the machine said it needed to be charged (it hasn't been acting low...car starts just fine).

I'm driving it to work today to see what it does next, and then getting it tested again on my way home. Has anyone here ever had similar symptoms as above? Does this sound like bad diodes in the alternator?

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So odds are the clutch or trans is toast, I'm more of a full size truck guy when it comes to doing work, what to look at? She's getting it towed and I have enough tools to do the job just not a ton of time this second to do the research, When I know more I'll add it.

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