MrSmokey
MrSmokey Reader
7/24/23 11:21 p.m.

So I bought this truck for a little bit of nothing thinking I could make a buck on it. I had to put a transmission in it (primary issue when purchased, or so I thought). Now it has random misfires and at first I was thinking maybe the catalytic converters were plugged but when I had the exhaust off during the transmission swap I blew in them with compressed air and found they seemed to be flowing very well. I then went for the spark plugs which didn't help. Next was a spark test and compression test. I have excellent spark but from what I can find I have no compression on #5. (I didn't check the others) my bad... Pulled the valve cover thinking maybe a broken spring but all seems well. When the thing is running I have zero blow by coming from the oil fill cap.
 

I hope you can follow me

What am I missing? Do I need to edge it? (Push it over the edge of a cliff)

Robbie (Forum Supporter)
Robbie (Forum Supporter) GRM+ Memberand MegaDork
7/25/23 5:42 a.m.

Is the misfire on number 5?

Need to figure out why the compression is low first. If you put air in the spark plug hole, where does it come out? (Intake, exhaust, or crankcase)?

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