fuel pressure regulator

 

the coil sounds like the right thing right now but im gonna go get the codes checked real quick and see from there

 

ok so i replaced one of the coils and that changed nothing.. at autozone it read some codes about my fuel mixture and an o2 sensor being weak but my cel is still not on, could this maybe be a clogged fuel filter? or maybe a fuel pump?

 

you need to post the code numbers. vague descriptions help us give you vague answers.

arbitrarily replacing a coilpack will do nothing, as you found out. as i said, its not the coil packs. your CEL would be flashing if it were. and you would have a P0300 and/or P0300X code, where X=cylinder number.

go scan the codes again, and write down all the numbers that come up.

 

Which coil pack did you replace? Did any of the codes say anything about a misfire on any cylinders?

 

nope one was weak o2 sensor the other two were something about the maf and vaf or something i know its not the maf sensor though because i replaced it not to long ago i dont know if this would help but i have a testpipe, i also replaced the vac line on the fpr

 

A test pipe will cause a CEL for the second 02 sensor for sure, unless you have a anti-fail thing on it. But the second 02 sensor is just a check and doesn't change how the car runs.

 

ok so now im moving on to the vac system when i give the car alot of gas its almost like the turbo turns on then off then on then off until i let off the throttle does anyone know where to get a good vac system diagram?

 

Under the hood. As your looking at the car, its on the lower left.

 

ok so i have one vac line that has a screw in the end of it maybe to plug it? its the only grey one that is by where all the other vac lines connect where is that expose to go?