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OK. Got this thing solved. cross-blown between cyls 3 and 4. clear as day in the photo. Bottom end looks great! No oil, crosshatching, I'm gonna bolt it back together with a new gasket. Phew! Thanks everyone for all the help.:cheers:

joe_peters and wheeling365, Thanks for the advice. I failed to mention when I had the shop do the leakdown they also tried some treatment to clean the carbon, with no luck. I just got an adapter from car quest for connecting my air compressor to the plug hole. Tomorrow I am going to pull the...

Not consuming any coolant. Besides the low power it starts, idles, runs fine. Both tests were done. Posted comp #s were from compression. The shop's leak-down revealed exhaust valve. They also looked in through the plug hole in cyl 3 and 4 and told me they noticed cross-hatching still on the...

I bought it with 89K, the PO had some aftermarket temp control on the radiator, and what appeared to be a new radiator. So I suspect it had a previous life of overheating. That being said, I got it for cheap, it had the AX-15 (hard as hell to find around here!) and I saved it from cash for...

I have been dealing with a CEL for a few months now and thought I would post it up for the professionals. Consistently get, p0303,p0304,p0300 on my '99 xj, 4.0, 0630 head, thing runs great, just low on power. After chasing down literally every sensor I had a leak-down done which resulted in...

natep1 Newbie here. could you be more specific about 'tapping into' pin six? I interpret this as running a wire from pin six to a switch and from switch to ground. Also, is the HVAC panel plug easily accessible? thanks