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The Stupid Engine Questions Thread

Good luck, and make sure to reference all positions of the existing one(rotor and sensor plug directions) if you know timing is correct, saves alot of time when dropping the new one in. Hope its not a 454 like mine, there is just enough room to scrape your hands on everything during replacement.
- 1990 305
- Post #2,074
- Mar 27, 2024
- Forum: Engine Performance + Maintenance
The Stupid Engine Questions Thread

So it seems gas is getting to the cylinder, im guessing "new spark control" is the ICM or the coil. I just went through buying all the same parts as you (excluding the injector) and still had terrible timing and backfire issues even after finding TDC. There is a camshaft position sensor that is...
- 1990 305
- Post #2,072
- Mar 22, 2024
- Forum: Engine Performance + Maintenance
The Stupid Engine Questions Thread

Now that the weather has finally warmed up, i got it figured out. The camshaft position sensor mounted in the distributor was bad, im guessing the cheap universal code readers dont put the right labels on all live data info. New fuel pump motor is installed now as well. The Burban is back baby!!
- 1990 305
- Post #2,066
- Mar 17, 2024
- Forum: Engine Performance + Maintenance
The Stupid Engine Questions Thread

Also, according to the RPO code L29, I have the MFI not the SFI spider injector
- 1990 305
- Post #2,000
- Nov 21, 2023
- Forum: Engine Performance + Maintenance
The Stupid Engine Questions Thread
- 1990 305
- Post #1,999
- Nov 21, 2023
- Forum: Engine Performance + Maintenance
The Stupid Engine Questions Thread

recently bought a 1996 suburban k2500 7.4L Vortec. it was running a little rough so i swapped plugs and wires. verified the original to me wires were correctly wired from distributor to cylinders. plugs looked like they had been used way too long but no gas, oil, or fouling, just very worn. now...
- 1990 305
- Post #1,997
- Nov 21, 2023
- Forum: Engine Performance + Maintenance