94Z28LS1toLT1

After my car is fully warmed up as I accelerate n cruise it pops hesitates,I changed everything fuel filter,fuel pump is new,spark plugs,wire,Icm,coil,distributor,two of my buddies said the 02 sensors could be bad

Injuneer

Does is have any codes for the O2 sensors?

Might want to add the year of the engine/PCM, since all LT1's are not the same.

94Z28LS1toLT1

94 Fred on both,and my buddy and I did a scan on it n his fuel trims were higher than mine,I believe they were 118 119 his are 128 129

94Z28LS1toLT1

Code 41 was there but got cleared on scanner,light isn't currently on,on cold temperatures car isn't giving me problems,after warmed up it's jerking,popping n feels like it doesn't wanna go

94Z28LS1toLT1

?????

Injuneer

Heat soak can affect the ICM, the optical cam position sensor in the Opti and the fuel pump. Faulty O2 sensor can cause problems when the PCM goes into closed loop, and uses feedback from the O2 sensors to control the A/F ratio.

Long term fuel corrections (which is what you want to look at) or short term fuel corrections? In which cell - there are 18 different cells, based on engine load and engine RPM, that the PCM uses to control the A/F ratio. If yours are long term, the engine is either in a true rich condition and the PCM is pulling 7% of the fuel out to correct the rich condition, or you have a "false" rich condition, and the PCM is pulling out fuel is shouldn't be pulling out.

But two data points without reference to a cell are not really useful. Time for Scan9495.

94Z28LS1toLT1

Thank u Fred I'll do a scan n give u the results,I appreciate it buddy

94Z28LS1toLT1

Hey Fred my mechanic swap opti said my other ones module was defective I had a warranty,so far camaro is strong n powerful,thank u

94Z28LS1toLT1

WOW!!!!!!!!Forget it back to square one,I'm getting a data log done with a friend n give u the results,Car is jerking n hesitating again ahhhhhh!!!!!!!

Injuneer

What brand Opti did he install? The cheap ones are trash, often defective right out of the box.

94Z28LS1toLT1

Hey Fred just got the log done with my friend I think it's the Tps bcuz I was only getting 45to50% on the log, when I was given it full throttle to the floor,no dtc were found too

94Z28LS1toLT1

Also my friend logged his car too n when u barely tap the gas pedal his tps goes to 100%,n mine was floored n only did 45to50%

Injuneer

Post the data log to an FTP site, or e-mail it to me so I can take a look at it.

Are you sure the floor mat wasn't stuck under the accel pedal? Take the air intake elbow off, and see if the throttle blades are actually opening all the way.

94Z28LS1toLT1

The floor mat is gone........I'm pretty sure I would have noticed that being in my way if I'm pressing the gas pedal,like I mentioned before that's the only sensor that isn't working properly n my friends response on his tps barely tapped......his went to 100%%%%%,mine was 45to50%%%%........everything else on the data log is working.so you told me to give u the results on the log I did,it was the Tps not giving response,then u wanna be a smart Alick saying the floor mat under the gas pedal wow!!!!!I'll change the sensor when i get off thanks

shoebox

Snagging on the floor mat is a commonly overlooked problem. I'm afraid you just had your last help from Injuneer.