Hey guys I don't know too much about cars so need help trying to pinpoint this problem rather than paying tons of money to a mechanic for things that aren't even wrong with my car!! My car ran perfectly when I bought it,but a couple a months ago, I had a new experience. I went to start my car, and it would rank and everything and start, but then it would struggle at idle in park for a second or two (heavy shaking/vibration), and then it would shut off, although the dashlights and everything stay on. Sometimes after a bunch of tries it would start and hold enough for me to be able to drive off, and when I drive a little while, it idles fine! Lately I would force the RPMs my accelerating, then then switch to drive gear in order to get it going out of idle. After having this problem for a few months, I've noticed that this problem ONLY OCCURS after ive driven the car for a lengthy distance, maybe 20+ miles, shut the car off, and then come back within 20-30 minutes or so and try to start the car again. So I'm thinking maybe the problem has to do with the car having power/electric problems? Because I've noticed that when the car is running sometimes the headlights dim for a second or two on their own, also, when I put down multiple windows at a time, all of the car lights interior and exterior dim. Do these clues show that there is some kind of power issue in my car?? I've also gotten the check engine light several times when my car struggles at idle, but when I get it going for a while, the light goes away. I've had it ran, and it said I have multiple random cylinder misfires out of 5 of the 6 of my cylinders I believe. with all this information given, do any of you have any idea what my problem could be??? Any help would be GREATLY appreciated.
Sorry to bump an old thread but I'm wondering if anyone knows the answer to the original posters issue. My niece's 2000 accord v6 has the same hard start/low idle stumble after the car has been driven then sit for a few minutes. Exactly as the original poster problem to the tee. Car starts and runs fine when cold. Issue only exists when car is warm and has been sitting for a few. Like when returning after a short shopping trip. No electrical issues though. Multiple cylinder misfire codes pop up after the low idle stumble. Otherwise no other codes and car runs great when it does start. Please help. I'm desperate to fix this issue considering my niece is pregnant and close to her due date. Thanks in advance.
Try this. Drive the car and warm it up good. Turn it off. After about five minutes take off the vacuum hose that runs from the fuel pressure regulator to the intake manifold and smell it. If it smells like fuel the fpr is bad.
Just a wild guess.
If the vacuum hose doesn't smell like fuel, the car will normally test the egr system on a warm startup. If the ports and egr valve is clogged it could run rough. If the first test is good. Clean out the egr ports. That may fix it. This is only true if it only acts up on a warm startup.
You can find howto threads on how to clean out your egr ports for your car.
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