so i still am having this problem. here is list of new parts installed, which has helped it run a ton better, but still pops sometimes under load.

-New Parts-
Plugs
Wires
Cap
Rotor
Coil
TPS
Map Sensor
Timing Chain Set
O2 sensor
Crank Sensor
Coolant Temp Sensor
no Vac Leaks
Fuel Pressure was 38
Re-checked and gapped plugs to spec.

is there any way that the IAC could cause this? i cleaned it but didnt help the problem. I have seafoamed everything, and put in 91 octane, still pops at me under load. but its not all the time its whenever it feels like it, seems to do it more with OD on than off. and it seems like it does it closer to shift points than other times. I was planning on replacing the trans filter and gasket cuz its leaking, but im out of ideas on this POP sound. Help before i pull my hair out please.

 

Pop as in backfire or ping?

 

pop as in coming from inside the TB not a backfire out the muffler. when driving its like its right at the firewall area. and i have got it to do it in park before and it came out the TB

 

Is this problem with the vehicle in your sig ? 93 ? Not too sure how an F1 will work without a tune. And you replaced a lot of sensors, what brands did you use? Could have a defective sensor.

 

the problem was there before the Airgap was installed. the sensors are brands i know work cuz i used them on my ram. like i said the problem has got better but is still present, and mostly only happens in higher rpm under hard acceleration, or just after it shifts and the rpm's drops back down. shifts fine.

 

Backfire out the TB or carb is usually indicative of a lean condition.

 

i know, and the fact that i have change everything else, is it possible for the fuel pump to drop pressure when under load?

 

Could be weak. You could try putting a gauge on it with a long cord and drive around

 

yea im prob going to, like i said at an idle in park it was 38psi but thats not to say maybe its droppin under load, causing it to be lean. if the fuel checks out then im at a total loss, i also thought bout the plugs being the wrong heat range, but i dunno bout that. i put the autolights 3923 or whatever its late....so i dunno if the number is right off the top of my head.

 

3923 would help ping, not backfire usually.
But yeah, try that, see what happens.