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long thread, take the time to read, youll be stumped.
Most of the people on this board know the issue i'm having. Low vac (14 & lower) and rich fuel. The vac goes lower than 14, usually to 12 or lower, and fuel is 10-11 AFR at idle and 10's at cruise. I've had this problem for several years now, even w/ different motors and heads. I've swapped every known sensor, and tried different ECU's. I don't want the thread to focus on that though.
Newly rebuilt motor was installed. Stock valvetrain, wiseco pistons, eagle rods. I've had the car sitting for a while while diagnosing has been done. No answers. Compression numbers, on the other hand, are making me wonder. I'd like to share them with you. These are numbers DRY and WET(half a cap of oil). both numbers were retrieved when the car's been warmed up.
from left to right(1st, 2nd, 3rd, 4th)
DRY - 148-175-150-125
WET - 165-187-157-140
Interesting note, the 3rd cylinder puffed smoke every time it reached TDC during the test. The others didn't. This was ONLY on the WET test. Surprisingly, all spark plugs seem to be ok looking except for the 3rd. The third is BLACK. The numbers and the plug lead me to believe that the 3rd cylinder is the one doing all of the work keeping the car running.
The pistons rings (wiseco rings) were gapped .17 top & .19 bottom. No they weren't installed upside down. Rings were installed at the specified, per wiseco, with specific "o'clock" directions on each piston. The pistons are wisecos, 20 over. the cylnder walls matched and were bored to the pistons. yes they were honed too.
Also, the vacuum has changed dramatically. It was low before, but now, it idles at 8 or lower. In a parking lot, it idled at 200 rpm and the vac was at 1-2! amazing.
There are no vacuum or fluid leaks leaks as a smoke test has been done. Personally, from the compression numbers, wet/dry, I believe that the rings aren't seating correctly. Before I make the decision to pull the motor and redo it, I need insight on ideas. The car runs and is still able to be diagnosed further. This should be fun. ___________________________________________
http://www.2gnt.com/quote_db.php?id=278
Outside of Corona: "That sucks, peace out..." (jamie walks away)... "Sweeet, what we doin?" -Zac
Tim's garage (prior to motor install): "Im gonna smoke real quick, that way if you fuck up I am already nicotined up" -Tim
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? You have at least done a vac check, no? And I don't remember, but you did check ALL marks on the timing, correct?
Everyone here gets shit. I get shit for driving a Neon, having a pink VC, and more than I remember. Fast and the Furious quotes make everything better. Everyone on this board has given you SEVERAL things to try for your issue and has been beyond helpful IMO.