that_Z69
Newbie
Hello everyone my 1999 k1500 suburban 5.7, was driving perfectly fine until one day It had a hickup sitting at a light, like it just missed a little maybe once or twice but went back to being perfectly fine. Drove 20more miles towards home and then everything went down hill. It started breaking up, had little power almost like it was running out of gas. Went home. Replaced cam and crank sensors, knock sensor, map sensor, cleaned MAF sensor, new distributor, new injectors, fuel filter, ac Delco fuel pump, most recent was new timing chain hoping that would solve it...no dice.
I checked my timing a million times with my scanner and zerod out the CMP retard to exactly 0, blipped to make sure it held reading, supposedly at zero. I think that the culprit may be old wires leading to the cam sensor on the distributor. My question is, how do you isolate a wire break in that? Can I set my multimeter to ohms and check for a break with he battery disconnected, or do I have to check with it powered up? I don't want to fry anything that's why I'm asking before I do anything. Didn't see anything online besides a post of like fixit.com or fixya.com... one of those websites where the original poster at the end talked about it being a bad ground by the firewall. I wish I could contact the original poster but I can't unfortunately. Was wondering if anyone had some insight. My car has been sitting for months due to this issue.
Starts right up, smells a little rich, idles fine, can rev to redline in park fine. Once I'm moving at a certain speed it like keeps misfiring/falling on its face off and on. Like it wants to go but it stops itself, then want to go again, then stops. Fuel pressure is good, have the updated injectors too.
I think it may be an intermittent loss of signal from the cam sensor and is throwing the whole thing off. But I'm no expert
I checked my timing a million times with my scanner and zerod out the CMP retard to exactly 0, blipped to make sure it held reading, supposedly at zero. I think that the culprit may be old wires leading to the cam sensor on the distributor. My question is, how do you isolate a wire break in that? Can I set my multimeter to ohms and check for a break with he battery disconnected, or do I have to check with it powered up? I don't want to fry anything that's why I'm asking before I do anything. Didn't see anything online besides a post of like fixit.com or fixya.com... one of those websites where the original poster at the end talked about it being a bad ground by the firewall. I wish I could contact the original poster but I can't unfortunately. Was wondering if anyone had some insight. My car has been sitting for months due to this issue.
Starts right up, smells a little rich, idles fine, can rev to redline in park fine. Once I'm moving at a certain speed it like keeps misfiring/falling on its face off and on. Like it wants to go but it stops itself, then want to go again, then stops. Fuel pressure is good, have the updated injectors too.
I think it may be an intermittent loss of signal from the cam sensor and is throwing the whole thing off. But I'm no expert