Horrible misfire help

[talontsi98]

Here's the deal. The car runs fine until it is warmed up. When it is warm any you come to a stop it will start missing and run on about 2 cylinders. If I disconnect the battery and reconnect, it runs fine. Compression, plugs, wires are good. The tards at chevron did put 89 in instead of 92 on last fillup.(have evo3 16g) What would cause this?

 

[djalogik]

Well its not a good a idea to haul ass on 89 ocatane..

 

[talontsi98]

I don't haul ass. Just trying to make it move with 1/8 throttle it will misfire and die.

 

[wises4057]

check boost leaks...was it miss firing before you got that cheap gas put in?? it could just be really REALLY crappy gas.

 

[talontsi98]

No it was not misfiring until I replaced the crankshaft position sensor.

 

[talontsi98]

Checked the reciept for gas and it was premium gas. So it is not gas octane related.

 

[dsmnightracer]

may be you have a bad sensor.

 

[talontsi98]

Switched in another coil and problem solved.