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Did you read the information listed in the “Idle Issues” thread on the home page? There is a wealth of information on there about diagnosing and fixing idle issues.
Did you check the basics? i.e. air filters, fuel pressure with a gauge? Check for vacuum leaks?
I did the air filter and checked for vacuum leaks could not find any but only with feel and sound as im not sure I wanna use carb cleaner or something may start fire since it only does this when operating temp and not when cold.. I don’t have a gauge to check fuel pressure 🙂
You can also check for vacuum leaks with a spray bottle filled with water. It may not be as accurate as using carb cleaner. I never use carb cleaner when the engine is warm, I always do it when it’s cool and when I start the car up for the first time of the day. This will decrease the fire hazard since the engine and it’s components aren’t hot. Also, a vacuum leak can be found when the engine is hot or cold.
would a vacuum leak only affect engine running while its operating temp?
like I mean one sec its fine then it starts missing temp gauge shows same spot. but its usually within it getting to that spot it starts missing. coolant level has not changed, oil is clean and fresh.
If it’s a vacuum leak that’s causing the misfire it’ll be most noticeable when the engine is the closed loop idle i.e. the engine is up to operating temperature and it’s at the normal idle RPM. The misfire could exist at higher RPM’s it just may not be as noticeable.
Do keep in mind though that there could be a different issue causing your misfire but vacuum leaks are one of the more popular causes for idle misfires.
As suggested, it’s a good idea to read this as many of your questions may be answered.
http://www.ericthecarguy.com/faq/solving-automotive-idle-problems
This may also be helpful.
http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
If you go through all that and don’t find the problem let us know.
well water did nothing for misfire.it did however make my service engine soon light flash which wasn’t even lit before.. I believe it started flashing when I cover the coil pack with water not completely sure as everything was pretty much soaked. any ideas..
would have to wait for it to be dark outside.im in Canada and no garage so its very cold and snowey 🙂
ok went to part source got codes read since service engine soon light was flashing heres what he gave me and are they all related or?
p0302,p0403,p0405,p0443,p0449
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