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post #1 of (permalink) Old 12-07-2001, 07:49 PM Thread Starter
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Need Help

I am getting ready to install a Howell fuel injection on my 86cj7 258. Before I do this I need to figure out if my engine is OK. It likes to blow blue smoke at stop lights, sometime a whole bunch sometimes a little. The engine is supposed to have only 10K miles on it. The number 1,2,3,6 plugs are a tan whiteish color and the 4 and 5 plugs are black. I did a compression test

DRY = 1-185 2-190 3-185 4-175 5-175 6-180
WET = 1-195 2-200 3-195 4-195 5-185 6-195

Does this tell me anything? What do I do next?

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post #2 of (permalink) Old 12-13-2001, 07:57 AM
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Re: Need Help

It doesn't sound all that healthy to me. The compression #'s aren't way out of whack, but I'd wonder about leaking oil rings or valve seals. Of course, you could just have a set of bad plugs or wires causing them to get gas fouled. Without actually looking at it myself I can only guess though. It doesn't sound like it only had 10k on it unless the rings never seated properly.. How fast does it go through oil?

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post #3 of (permalink) Old 12-13-2001, 09:50 AM
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Re: Need Help

if the engine wasn't rebuilt properly or it wasn't broken in properly then it may need new rings and seals. My old CJ had a chevy 350 with "only 9000" miles. When it started blowing smoke into the cab, I asked the PO...turns out he rebuilt it himself and he was NOT a mechanic or an expert. While you have the engine apart, or before you do the install...get the engine checked out professionally - see if they'll let you watch or tell you what they're doing so you can learn. All it takes is practice and experience to do most of the engine work correctly. Good luck with everything.

95 Wrangler Rio Grande...She's gettin there - I'm all about the 4 cyls
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