Fuel Trim Mmalfunction Or Different Engine

[twocanewayne]

Ok guys and girls need some thoughts on this its driving me nuts. I am getting a cel, fuel trim malfunction bank one. All I keep hearing is because I put a 92 six bolt in a 95 tsi and put cams in it (264's) and did a 3 angle valve job and my other mods listed on my profile, thats why I have the cel. Now I checked the top o2 and dont have a boost or vacuum leak so could it be that my eprom ecu doesnt read whats up with the motor? Or what else could it be? The car runs great!! But sh&ty gas mileage Thanks in advance.

 

[Zeppelin]

I would swap that injector to another cylinder and see if the code switches to that cylinder. If you're getting bad gas mileage it could be an injector sticking open.

 

[Rex2342]

If your getting a CEL you may have messed up something with the install of he 6bolt. If the injectors check out double check the wiring on the CAS and ignition harness.

 

[twocanewayne]

I can take the cel off but only for maybe 2 days. So you think it a injector? I need to change them to some 550's.

 

[twocanewayne]

I would swap that injector to another cylinder and see if the code switches to that cylinder. If you're getting bad gas mileage it could be an injector sticking open.

Which injector?? Do I change around?

 

[twocanewayne]

I did the swap and about 2 weeks later I got the cel. So does that cancel out the wiring situation?

 

[Rex2342]

I did the swap and about 2 weeks later I got the cel. So does that cancel out the wiring situation?

Possibly but it's always better to double check everything. Somthing could have simply came loose.What Zeppelin was suggesting was since you know what cylinder is malfunctioning try swapping that particular injector to anther cylinder to see if the malfunction follows it.

 

[twocanewayne]

Well I have a appointment wednesday to have it checked out. Ill tell you whats up then.

 

[twocanewayne]

What would I need to check the injctors like that? A logger or what? I need something like that!

 

[blackGSX2g]

Is your front o2 sensor cycling between 0.01 and 1.00v?