Random cylinder msifire!!!!!!

[Fast 95]

Cylinder 1 keeps fouling plugs, but i pulled it today and it was yellow!

 

[Fast 95]

I also haven't changed the crank position sensor, would that be the problem? If i change it will it need a "crank relearn", or is all that just mumbo jumbo nonsense?

 

[Butch]

#1 one in my '98 vortec was doing just the opposite and the injectors were overloading it, I swapped it to MSFI and that corrected the problem. Have you pulled your other plugs in comparison?

 

[Fast 95]

Yeah the other plugs look good, i did the injector swap with a delphi unit, which i thought was just an ac delco in a different box.

 

[Butch]

Yeah the other plugs look good, i did the injector swap with a delphi unit, which i thought was just an ac delco in a different box.

yeah delphi and AC delco are pretty much interchangeable, there the same ones that made our stock head units. Have you checked cap and rotor?

 

[Fast 95]

All the ignition is new, even the distributor. I rechecked my fuel pressue after talking to some people who told me these motors are very finniky about the pressure. Mine is 57psi key on, engine off, and drops to 50psi when started. From what i've read it should be aleast 65psi, is this right, if not what should the pressure read? Maybe my fuel pump is on its way out, has its good day and its bad.

 

[Butch]

Im not sure on fuel pressure PSI but I doubt its the fuel pump, Ive replaced 3 in this truck and when they're close to their dimise they become intermitten and then just conch out, or atleast in my experiences thats whats happened

 

[Fast 95]

I wonder if its the stock pump, the truck has 181,000 miles!!!!

 

[Mike]

Sell all the parts you bought on here and buy a 5.3

 

[Fast 95]

Sell all the parts you bought on here and buy a 5.3

Lol, she wont let me spend that kind of money on the 96, its just a work truck/junk hauler.