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1. I have 6 plugs out, but #6 and #8 I have not gotten to yet. I recall one or both is a PITA to get at, I changed them a couple years back and I'm just now starting to heal up. What are the thoughts on leaving those 2 in, testing the others, and hopefully finding the problem before having to deal with them? I'm trying to think why that would have a negative effect on the test results or the ability to test and I'm not coming up with anything. If the other 6 all test close, obviously I have to do those.
2. Looks like I need to pull fuse #16, primary fuel pump. In the auxiliary fuse holder pull fuse FP2. Injector fuses are #8 and #13. What else? Instruction to have throttle blocked at least half open is noted.
3. Any special tips on getting the little fitting for the tester into the holes? Bad enough with a spark plug, I can guess these will be even more fun. I'm already paranoid about cross-threading it.
4. Any other suggestions? I have done this before but many years ago and not on this car.
Interesting. the plugs from 1 thru 5 had clean white insulators, 7 had a bit of fouling. #5 looks a bit too white, maybe?
My scope is at the other shop, I'll be going out there in the next day or two and will bring it back.
The gaskets tend to rot and blow into the coolant passages at the very rear of the block. Those are cyls #7 and #8..
I brought the scope home and did a little looking but it was hard to get a good view, may try again a bit later when it's not as bright out. (this will be an outdoor project ). It did look like #8 was different, brighter inside. I cheaped out a couple years back when I bought the scope and it does not take pics so I won't be able to post anything.
I have several projects all going on plus normal maintenance, lawn mowing etc. HOPE to get the compression test soon but might be Monday.
But what I'm hearing is, if I'm going to go to all the trouble of pulling whichever head has the problem, I might as well pull the other one at the same time. Agree?
I am already a fan of Mahle gaskets, so that is what I will use. I have not yet pulled the other 2 plugs - 2 yards to mow, grandson here for a couple days, and the C-2 project . In fact, the C-2's original engine had a cracked head and it's exactly as you say, that cylinder was clean as a whistle. Plugs in the '92 have about 2,000 miles on them so almost new.
Thank you for the input - much appreciated! It's not my first motor teardown, and I will admit I am more intimidated by all the vacuum lines, relays, modules and sensors than I am by the heavy iron itself. I do have the FSM, and will probably make myself a worksheet ahead of time so I can have it all lined up. I replaced the heater core in this car a couple years ago and it's something else. There may only be 10 steps to do it but each of those 10 has 10 sub-steps, and many of THOSE have 8 sub-sub steps, and so on. I take many digital pics, I try like hell to label and bag everything I take off - yet it seems there is always something either left over, or won't go back together right.
Another compression test question thread
What are the thoughts on leaving those 2 in, testing the others, and hopefully finding the problem before having to deal with them? I'm trying to think why that would have a negative effect on the test results or the ability to test and I'm not coming up with anything. If the other 6 all test close, obviously I have to do those.
). It did look like #8 was different, brighter inside. I cheaped out a couple years back when I bought the scope and it does not take pics so I won't be able to post anything.
I take many digital pics, I try like hell to label and bag everything I take off - yet it seems there is always something either left over, or won't go back together right. 
