- Jan 16, 2017
- 29
- 0
- 1
So I pulled my motor out of my 90 5.0 and put on GT40X heads as well as an f cam, and now when it's at idle cylinders 5 6 and 7 aren't firing. I tested the compression, it's at around 120 on all cylinders. When I give it gas and rev to about 1500 the other cylinders seem to start firing. Checked TPS, it's at .96 volts. Unplugged the IAC and there was no change in idle. When I pull out the spark plugs after idling they are wet with gas. Also with the intake, upon startup the rpms will jump to about 1200 then immediately die, will only stay running with intake off. Ran perfect before I replaced heads and cam. Any help would be greatly appreciated guys