Cylinder 2 Misfire help N62B44

[Fatcat]

Originally Posted by 80stech

A misfire only under load is usually a spark problem.

Spark problem meaning no spark, right? If that was the case wouldn't the cylinder 2 exhaust port in the picture be cleaner due to gasoline spraying?

[80stech]

The DME shuts off fuel pretty quick to a missing cylinder.
I'm not going to reread this thread but you seem to be a bit all over the map about what's going on. Did you do a compression test ? Do you have a scan tool working?

[Fatcat]

Originally Posted by 80stech

The DME shuts off fuel pretty quick to a missing cylinder.
I'm not going to reread this thread but you seem to be a bit all over the map about what's going on. Did you do a compression test ? Do you have a scan tool working?

Compression test came out 120 PSI, scan tool works somewhat, haven't tried to check live data yet.

leak down test is next once the kit comes.

[80stech]

Not likely that all cylinders were within a few psi of 120. Did you do only 4 compression strokes or 10 or whatever seconds of cranking ??

[Fatcat]

Originally Posted by 80stech

Not likely that all cylinders were within a few psi of 120. Did you do only 4 compression strokes or 10 or whatever seconds of cranking ??

it was around seven months ago, so I don't remember. im going off what I said in the forum earlier.

We did 5 cranks and they all came out fine, no sudden loss of pressure or anything like that.

Regardless, we're still gonna do the leak down test to be more precise because we could've missed something. Until then, I don't have much to say until I get the results, gotta go pick up the compressor from the shop.

[Fatcat]

well uhh i think we found the problem, we took off the rockers and stuff so the valves stay closed, put some air into the spark plug hole and gasoline in the exhaust port and it started bubbling like crazy.

we have a bent valve, here's the video https://youtube.com/shorts/yhOJENiTfrU

I tried to upload it as a normal video but it became a short ):

so basically the dude who did our timing guides messed up our engine and didn't tell us. so from now on were probably gonna stick to working on our own cars.

[80stech]

You forgot to say "Thanks for all the help from the this forum."

[Fatcat]

Originally Posted by 80stech

You forgot to say "Thanks for all the help from the this forum."

My bad, I didn't forget I was just waiting to see if anyone had anything else to say so i could wrap this up, anyways, Thank you everyone for helping me figure out the problem today we ripped off the head and took it to the machine shop.