i have a major vacuum leak, its coming from my intake gasket so i must take the intake manifold off and replace the gasket... gonna be a pain in the ass. i dont know if this is the reason why its so hard to start the car and why it misfires...

 

check your TPS and cam sensor. then replace your coil pack.

 

ive replaced the coil pack, and cam angle sensor. still the problem is there but not as bad as it was since i replaced the gaskets

 

i replaced the intake gasket and the battery. now it runs better but it misses a little and is hard to start when its not up to temperature. it is throwing codes and here they are:
12- volume air sensor (for some reason i doubt it)
13- intake air temp sensor (wheres that?)
21- engine coolant temp sensor (my fan and temp guages work )
25- barometric pressure sensor (what is that?)
31- knock sensor (its melted)
41- injector (i dont know if the injector wires are plugged into the right injectors)
if you have any information about any of this, it would be helpful. thanks

 

12, 13, 25 ARE ALL MASS AIR SENSOR

 

ehh looks like gm maf translator time?

 

You've got a bad mass air flow sensor, just like I told you a few days ago

Bad IAT sensor, it's built into the MAF on your car.

This is what sends the signal to the computer to tell it what temp the engine is running. In other words, it effects timing and fuel delivery. The guage runs off a different sending unit. It'll be located right around the thermostat housing.

Again, integrated into the MAF.

It'd be a good idea to replace that

Doubtful. Do you have a test light? Check to see that you've got power to all the injectors. If so, then you've got a bad injector. To figure out which one it is, take a stethoscope, or if you don't have one available, a long screwdriver stuck up to your ear will do, and stick it to the base of the injector and listen for a faint clicking noise everytime the injector fires. If you don't hear it, then the injector is bad.

 

i have a injector light test kit. all injectors work

 

check your ISC motor... did replacing that gasket fix it? also make srue your base timing is set properly, it should be @ 5 degrees..

 

I set mine at 8.