So I was getting a high idle at about 1100 rpms and after I adjusted the valves it was getting anywhere between 1100 and 1800. After it warms up it is usally on the high side and when I am sitting there letting it idle, it just keeps backfiring but just little popping, nothing big. I checked for air leaks and its not throwing any codes. Any help or ideas is appreciated, thanks.
High Idle+Backfiring
- Thread starter Twigger
- Start date
backfire is usually from running too rich i believe.
edit: i remember, its probably that coolant temp sensor on top of thethermostat housing. mine was broken once and the car idled high...and backfired.
edit: i remember, its probably that coolant temp sensor on top of thethermostat housing. mine was broken once and the car idled high...and backfired.
Timing. Period.
Reset the CPS, check all the spark plug wires/coil pack for crossed spark plug wires....
I had the same thing when i rebuilt mine...took me three freaking days to figure out it was the CPS....it was set wrong.
-Jonathan
Reset the CPS, check all the spark plug wires/coil pack for crossed spark plug wires....
I had the same thing when i rebuilt mine...took me three freaking days to figure out it was the CPS....it was set wrong.
-Jonathan
I don't have any bov just the stock bypass valve. By resetting the cps do you mean pull it out and put it back in, if so why would it make a difference if I already set it at 10 degrees. Also it only will backfire after the engine has had a chance to warm up a little. If the engine has any load it does not backfire. Thanks for the input.
its your timing...its WAY off...when i was having problems such as yours i put a timing light on my car and saw i was like 35 degrees ADVANCED ...i was like oh shit lol..reset it correctly and it fixed the problem.
try completely resetting your timing...also you want to set it to TDC and the ecu will advance it accordingly.
try completely resetting your timing...also you want to set it to TDC and the ecu will advance it accordingly.
yes, having your timing extremely advanced will cause your engine to idle high and random backfire/misfire. i had this happen when my CPS was a tooth off and was running about 25* BTDC advanced.
mmm...POSSIBLY, but i wouldnt count on it. you could pull the upper cover just to confrim or deny your suspicions though
J
JerzeySlowpra
Guest
my timing is dead on because i just reset mine 2 weeks ago cause my cams jumped off 2 teeth some how... but anyway i reset that and put new denso plugs wires in my car and i have a smooth 600-700 rpm idle when im warm and i have that tiny back fire in my exaust and i know all my sensors are good cause it took me 2 days to figure out that it was only the timing after i had already gone over every sensor, i know my car runs real rich cause you can smell it so i dont know, your idle is def wrong but coem to think of it i think my cars always made the little backfire noise here and there at idle. although i think it may just be because i have a tiny 3 inch Y pipe on my DP with a door with 3 wing nuts to take on and off for open exaust it could just be back preasure from the exaust going into that 2 inches of pipe and hitting the door