Cylinder 4 misfire

[Joe@lolavisuals]

First time poster. My 99 Vehicross (new motor) is throwing a cyl 4 misfire code and shaking like a muscle car. Were to begin?

[yellowgizmo99]

change coils and see if stays on 4 first.

[SilverBullet75]

I had a similar issue on my previous VX. Found that the wiring harness that feeds the coils had issues when I moved it around while the engine was running. It went away when I pushed down on it... so I zip tied it to the rest of the nearby harness. Problem "remedied". Worked fine until I sold it about 3 yrs later.

[Joe@lolavisuals]

I've tried switching #4 and 6 coils=same code
Then I swapped #4 and 6 spark plugs and got the same thing

[Joe@lolavisuals]

I'm guessing this test cleared my spark plugs as being the issue. Injectors next?

[PK]

Joe, don't know anything about your skills, but just check that you are counting your cylinder numbers correctly. There is a Service Manual on here that shows the layout.

Other than that, yep I would go fuel injector, and then compression test.

Good luck.

PK

[Triathlete]

When I had a "misfire" code ot was solved by cleaning the fuel rail.