Hey, my name is John Lee and I would like to start off by saying I am a huge fan and have been watching your videos for a while now. I also have a huge problem and I really hope you can answer or help me to solve my problem.

The problem goes as follows.

I was given my grandmothers truck after her passing last summer, which I've always wanted it since I was little. It is a 1997 Chevy C1500 silverado with a 5.7L Vortec 350. I had the transmission rebuilt as soon as I received it, but the engine still ran amazing. After several months I needed to replace my entire distributor. I proudly did it myself and ended up getting the timing off by a few teeth. I took it to a mechanic to adjust the timing and when I got it back it was misfiring. At first it was a random misfire. I cleaned my egr valve with carb cleaner and this lead it to only misfire on cylinder 5. Then I replaced the spark plugs, spark plug wires, and ignition coil. The problem persisted with even my best efforts and a great deal of research. After that I kept trying and ended up replacing the spider fuel injectors with the more updated multi port injectors. This did not make a difference and my truck has been running rich for months now and is burning out my O2 sensors. I am lost and confused with no sense of direction. I really hope you can help me because I really need it.

Comments (2)
No. 1-2
Jleeiii
Jleeiii

Well that kind of broke my will to fix the truck but I replaced the fuel pressure regulator when I did the injectors what else should I try

ScottyKilmer
ScottyKilmer

Editor

realize those vortec systems stink at that age, and ONLY replacing every stinking plastic part on the fuel injection system will fix it correctly, every part, including the plastic fuel pressure regulator. Start there.