Fluctuating Idle
 

So long story short, I replaced basically everything I need to that should have fixed this problem.

One day I'm driving down the road, I get a check engine light, everything running fine im like okkk? check engine light goes away, so im like great. and later driving driving.. bam, she stalls. I start her back up and she runs for a bit and bam.. stalls again. I pull into a parking lot to check whats up and noticed one of the sparkplug wires connected to the coil is all rusted. Had it towed home and it would start up fine, then slowly die.

What happens is that the car will start up normally. I can rev it and it will be all fine right, then when shes warms up after a min she starts to stall. I can probly keep her going say if i were driving but not if I were stopped or whatever.
Like even after I replaced and checked and cleaned everything, i mean everything dont get me wrong.. what happens is like RPMS go up -like pedal is pushed / gas is flowing to keep it alive- then rpms drop like the CPU stops the flow of gas to correct the high RPMS right? so it goes back and forth until the RPMS go so high and that no gas is needed to correct and then it flips over like a boat in a storm u know what I mean? back and forth up and down til RPMS go to zero and engine stops.

thats my problem. what is the solution?? ok I checked and replaced everything, even going out of my way to replace the Camshaft sensor cause couple people said thats probly it. I did that she ran like a beaut until couple min later died.. maybe replace Crankshaft sensor this time?
is there anybody who knows?? fuel filter was changed 1 year ago, i doubt its the fuel tho. oils fine, uh.. idk what wouldnt be fine.

I even replaced one O2 sensor pre-cat, have the post-cat one but its too damn cold and that one is pretty tight. Ok I did all these things, still NO check engine light, i dont have a scanner anyway..

I'm just hoping when i get around to do 2nd O2 sensor that would cure whats happening.

So like I said, I did everything imaginable basically.. I replaced all new plugs, wires, got a new ignition coil cause one was rusted, plus I changed all 3 couple years ago.
I changed the PCV.. cleaned the ICM (didnt look like it needed replacing, but had some crude I cleaned off pretty good, thought thatd do it with new ignition coil but nope..), I cleaned my IAC, checked MAF..TPS.. made sure nothing like air filter was clogged.. uhh check TPS, checked everything right? vaccum lines batty cables attached and good checked the whole everything, even BUSS connectors under carpet and fuses check out ok. OK? I make sure its all in good shape, its just been awhile for some things that probly needed to be replaced or cleaned anyway.

So i did all that. what am I missing..? a new car?? lol. could it be something with the engine inside like a leak, burnt valve? no leaks that im aware of. I figured itd be with ignition cause of strange fluctuating idle, now my guess is computer and bad o2 sensor but what you guys think??

Since we are close.. would you like me to take a look at it? I should be able to figure it out.

Cam sensor BTW should never cause a car to stall. FSM states that even if they are bad, they'll only cause a 1 in 6 chance of the car starting. Once started, though it stays running. Your issue is kinda sounding like a fuel pump or fuel delivery.

fuel filter, or maybe FPR?

Ok thank you.
 

I'm going out to drop the tank again I suppose. I appreciate the offer but I'm strapped for cash right now going to have to do this on my own ill check back later let yall know if anything changes. By the way I did mention that I took it to oriellys to check codes still only have the p300 p306 and the codes heated o2 bank 1 I believe. It's really strange to me though it only died when I was making a right hand turn. But I'll check the pump and filter. Thanks again for the leads..

What? Who you talking to? This post is 10 years old.

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