Search results
-
Engine misfire, reduced power, no codes.
misfire issues finally resolved My misfire issues were finally resolved. Turned out to be two clogged converters. Went ahead and installed the MagnaFlow ones to get a little more performance out of the system, as I got them for only $299 at Advance Auto Parts thanks to their price matching...- madmike
- Post #7
- Forum: Engine & Drivetrain
-
Engine misfire, reduced power, no codes.
Fuel pressure is supposed to be 48psi with the key on and engine off. That is the perfect factory spec. GM thought the same thing for mine but we tested it and they said 48psi was perfect, so there is nothing wrong with my fuel pump pressure.- madmike
- Post #6
- Forum: Engine & Drivetrain
-
Engine misfire, reduced power, no codes.
Hard to tell from the photo as it is b&w if it is the right ones or not, it has to have the green rubber around the 'cathedrals' for the intake runners. Here is an example...- madmike
- Post #4
- Forum: Engine & Drivetrain
-
please help at end of rope!!!
Been in the same situation Mike, I replaced the intake gasket and o2 sensors and MAF and still misfiring. Fuel pressure fine here also. Regulator also working fine. Just a couple of items for anyone checking this thread... a hole/crack in the cold air intake duct between the MAF and throttle...- madmike
- Post #12
- Forum: Engine & Drivetrain
-
Engine misfire, reduced power, no codes.
Austin, Been having similar issues with my 2003 Yukon XL as well. Seems to be a common issue with them is the misfire. For your question the purge valve is supposed to be loose as it only has a rubber grommet that goes around the plastic part where it mounts to the manifold. I thought mine...- madmike
- Post #2
- Forum: Engine & Drivetrain
