vortech01vert

ok ive gotten to the point with this car that i just wanna drive it off a cliff, it throws a code for missfire on cylinder 4 so i replaced the spark plug and cop and reset the computer and yet it still throws the code. It also says no maf voltage, and ive switched out 3 different maf and it still says the same thing. The car idles really rough like it has a huge cam and after awhile of driving it will die when you come to a stop. Ive also replaced the iac thinking that might fix and and nothing changed. I really dont know what else to do, and suggestions?

Sxynerd

Are these MAF's set to the correct injector size? Have you tried changing the COP boots? If you haven't already swapped the entire COP w/ boot to another cylinder try that to see if it moves the problem to another cylinder.

Trace your w/h plugs and make sure you maf is actually plugged in correctly.

The main harness plug in the corner of the engine bay, make sure it's plugged tight.

Also, although it may seem novice, make sure you plugged in the injector for cylinder into cylinder 4 and not someplace else. (it can be done)

Brute03

also, have you done a compression/leak down test on cyl. 4?

vortech01vert

we put the cop on my friends car and it didnt cause any problems, i checked to make sure that the maf was plugged in and it was. just went out and checked to see if if everything you mentioned was plugged in and everything was, i havent done a compression test, do you think there could be something wrong with the cylinder?

vortech01vert

o and ive taken it to two different mechanics and they cant tell me whats wrong with it

warren740

idk exactly the issue with your car but i had a burt piston in my engine which eventually cracked and its idle was really rough and sounded like it was cammed, some mechanics have little camras that they can get into your piston with, thats how i found out about mine, it never shut down on me though