Dear all Ls1 tech Members...
I really need ur help in my problem.
I have a camaro ss 2000 model T56 with full bolt-on's but with out any cam..
anyway my car when i give it full throtle in the 3rd gear and great the check engine light start blinking and when i check the code it comes the p0300 code..
i changed a lot of things in my car to fix it like the coils, spark plugs, head gasket, wire plugs, fuel filter ....etc
did anyone faced the same problem.....Need ur advice please

 

That is a missfire code and from what you said you have done that should have taken care of the problem. Mind boggling......

 

I know thats its a misfire but after all what i have changed its still coming again and again and again...i even took my car to the GM delaer and he said that they dont know what else to do

 

please guys still i need ur help guys please please

 

well that dealer is retarded. ill bet its ur o2's. changing the head gasket is a little drastic for a misfire. a lot of misfires r due to bad o2's. also is this always around the same speed? if so check ur TPS it may be worn down and not making a good connection.

 

whats a 02's..can u please explain and where can i find the TSP thing?

 

O2 Is an oxygen sensor. it keeps track of how much oxygen is in ur exhaust and is a leading factor on how much fuel to give. if this is wrong u may be dumping too much fuel or not enough causing an improper spark. u have 4 oxygen sensors and theyre not that expensive. a TPS is a Throttle Position Sensor and it detects how much throttle ur giving the engine. but like i said if it does it at a certain speed, it might be a TPS. the TPS is located on the driver side of the throttle body and is a 3 wire sensor.

 

this happens only in third gear?

 

starting from third gear going to 4 th and 5 th gear also

 

by the way i just installed all 4 new oxygen sensors but its still the same and about the tsp i will check it later

 

Did the dealer tell u what cylinder was missing. They can put a tech 2 on it and watch the misses as they happen. some times the injectors get dirty causin p0300.

 

i clean my injector

 

do you have a K&N filter? if so, find another car and try the M***AirFlow(also called MAF) sensor from it. it may be contaminated with filter oil. and how did you clean your injectors?

 

i did all what u said guys and its stilll the same....

 

get a spark tester and test each coil.