this problem started out when I bought a set of stock injectors and a stock chip to hopefully pass tough VA emissions. I put in the injectors and the car ran really poorly and was cutting out after starting so I swapped back to the 72 lb injectors, car ran fine.
I ran it to the station, and the car started running really poorly, had to limp it back home (acted like it was running on 4 or 5 cyl)
well then it got worse, car would turn over and not start. I got a bit disgusted and the car sat for a couple of months. I put some fresh gas in it, charged up the battery and it ran fine again! I let the car warm up, tried to start it again, and it's back to firing and then run very rough and cut out
I checked that I have fuel pressure, tried swapping out the LS1 MAF with the stock one, trying a spare ECM, and checking connections to the coil pack/module no luck, car fires and immediately dies
I don't have any codes set, and am thinking this is a wiring problem.
I thought at first the CAM position sensor went bad, but since it fires here's what I'm considering but need some feedback on how to best trouble shoot
1. bad injector wiring harness. thought about putting a test light on each injector while turning over the car to see if it lights up. I've heard about "noid" testers but don't really know what the heck that is or how to use it. I do have a volt/ohm meter and a test light.
2. bad ignition module. car has a recent coil pack
3. bad wire in engine harness. this car is getting old, and the wiring is original, but that is probably beyond me
don't want to throw parts at it, any help or suggestions is appreciated!!
I ran it to the station, and the car started running really poorly, had to limp it back home (acted like it was running on 4 or 5 cyl)
well then it got worse, car would turn over and not start. I got a bit disgusted and the car sat for a couple of months. I put some fresh gas in it, charged up the battery and it ran fine again! I let the car warm up, tried to start it again, and it's back to firing and then run very rough and cut out
I checked that I have fuel pressure, tried swapping out the LS1 MAF with the stock one, trying a spare ECM, and checking connections to the coil pack/module no luck, car fires and immediately dies
I don't have any codes set, and am thinking this is a wiring problem.
I thought at first the CAM position sensor went bad, but since it fires here's what I'm considering but need some feedback on how to best trouble shoot
1. bad injector wiring harness. thought about putting a test light on each injector while turning over the car to see if it lights up. I've heard about "noid" testers but don't really know what the heck that is or how to use it. I do have a volt/ohm meter and a test light.
2. bad ignition module. car has a recent coil pack
3. bad wire in engine harness. this car is getting old, and the wiring is original, but that is probably beyond me
don't want to throw parts at it, any help or suggestions is appreciated!!