Exhaust/vacuum leak.
Also...if your fuel trims are screwed up...it'll make it bog. I had that issue.
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12-04-2010
Exhaust/vacuum leak.
Also...if your fuel trims are screwed up...it'll make it bog. I had that issue.
12-07-2010
Well ive been messin with it and im prety sure i need to replace the head gaskets because i loose coolant really fast and that would explain my cylinder 4 missfire when the motor is cold and i will most likely throw a cat back on there and see what happens. What is a good fuel pump? im prety sure that is going out too because when i get on it, it boggs first and then goes
12-08-2010
I'm not seeing what year/model you have. I see gtpinsc said you needed the L67 section, so I'll assume that's what you have. Please mention year/model though.
It's quite uncommon for a head gasket issue. It's pretty uncommon for an LIM gasket to cause a notable miss on a cylinder as well. Sure the gaskets look horrible and have caused some issues, but it's not all that common.
Do you have any codes, or check engine light lit up? Please pull them and list them if you do. With the way it's running , there should be something.
Has any work been done to the car recently beyond the wires/plugs/coils?
Pull the #4 plug and take a picture. Is it wet with coolant, carboned up with gunk? What's going on in #4 is what you need to know. I have seen an ICM go bad and not fire at the correct time for the second cylinder. It's uncommon as well, but can happen.
Before you start tearing down, let's get as much info as possible to help you pinpoint the repair needed.
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