Alright the car wouldn't start yesterday. Put new plugs, wires, and pulled a bunch of fuel out so that it would run right, without fouling my plugs. Now Between 1500-2000 on my autometer, it's got a BAD misfire!! I've pulled fuel and added fuel, add spark and pulled spark and it doesn't seem to get any better. If I'm light on the pedal it'll go on past 2K without issue. If I go anymore than ~10% throttle, it sputters, misses and eventually die out if I don't let off the throttle. If I let off it'll come back to an Idle on problem. Should I take a look at the spark and see if it's all good? Or should I just go further into the fuel and spark issues. I checked Trax's PE thread, but it didn't really help. If anyone has had this issue, or knows where I can find some help please point me right. I can't drive this car with the way it's running so I do need some help.

Thanks
Chris

 

At a glance, from what you've said almost sounds like a stuck injector.

Put a fuel pressure guage on it, and pressurize the system, then turn the key off. The pressure should take at least 15 mins for any noticeable change.

Other then that, I'd suggest the normal mechanical checks.

 

I did hook it up and was messing with it all day yesterday, and I did notice the fuel pressure does NOT hold. I guess the 104K mile stock LT1's aren't good for ****. Oh well there goes another $200. Thanks Grumpy.

Chris

 

My guess is an AE issue. You pulled a lot of fuel out but now you get a lean backfire whenever you 'get on it'. Try adding some AE via the delta %TPS (if that doesn't fully work then you can also add some extra in via the delta MAP).

Tim

 

Ok I'm still new to this and unfortunately I don't know where exactly you're telling me to look. I'm using WinBin, and I just can't find what your saying Trax. It may just be me though.

Chris