JaSSon Posted April 16, 2009 Report Share Posted April 16, 2009 I parked the car on 3/20 and it was running fine. I went to start the car on 3/29 after I returned from vacation and it wouldn't start. Actually it started and idled for about 2 seconds, then died, THEN nothing. While cranking the car makes kind of a puffing sound. So far I have made sure I have fuel. The fuel pressure gauge reads like 40psi after cranking, the pump does come on, and I could smell fuel when I pulled the plugs. I have also verified that I have spark. Having fuel and spark I rented a compression tester from Autozone. Here are my results for the compression test: Cylinder 1 60psi, cylinder 2 45psi, cylinder 3 70psi, cylinder 4 30psi. I know all 4 of those numbers suck and 2 and 4 extra suck, but I have trouble believing a running car suddenly lost compression whilst parked during vacation. I also don't think the motor somehow jumped timing. I hear no PTV noises during cranking. I think the Autozone gauge sucks. Does anyone have a better compression tester or a leakdown tester I could use? Any more ideas? Car is a 93 manual AWD eclipse. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted April 16, 2009 Report Share Posted April 16, 2009 compression could be low due to the cylinders being washed down with fuel. or heavy carbon on the back of the valves.. do a wet compression test and see if it come up Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 17, 2009 Author Report Share Posted April 17, 2009 What is a wet compression test? Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted April 17, 2009 Report Share Posted April 17, 2009 http://www.geocities.com/dsmgrrrl/FAQs/compression.htm Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted April 17, 2009 Report Share Posted April 17, 2009 wet test is at the bottom of that link and if you would like to try my compression or leakdown tester, lmk. Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 17, 2009 Author Report Share Posted April 17, 2009 http://www.geocities.com/dsmgrrrl/FAQs/compression.htm Good link mang! Ahh, I didn't pull the MPI fuse. Bet the cylinders are washed down now! I'll try a wet test next chance I get. Would the fact that the car hasn't run since 3/20 and thus I can't get it to operating temp effect my readings also? Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted April 17, 2009 Report Share Posted April 17, 2009 yes... Quote Link to comment Share on other sites More sharing options...
John Bruh Posted April 17, 2009 Report Share Posted April 17, 2009 ecu caps. common problem. Take you ecu apart and look to see if their leaking Quote Link to comment Share on other sites More sharing options...
John Bruh Posted April 17, 2009 Report Share Posted April 17, 2009 or just sell it to me Quote Link to comment Share on other sites More sharing options...
Guest mitsumodder Posted April 17, 2009 Report Share Posted April 17, 2009 I am redoing my caps right now...caused a crank no start condition. could not get any codes or anything. Quote Link to comment Share on other sites More sharing options...
dragknee66 Posted April 17, 2009 Report Share Posted April 17, 2009 Ya those numbers are DSM weaksauce for sure. I have a good compression tester as well, and Im extremely familiar with the cheap mans supra. Hit me up on PM if you need some help. Quote Link to comment Share on other sites More sharing options...
spooling 1g Posted April 17, 2009 Report Share Posted April 17, 2009 ecu caps. common problem. Take you ecu apart and look to see if their leaking +1 Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 17, 2009 Author Report Share Posted April 17, 2009 ECU has new caps. Did it over the winter. Quote Link to comment Share on other sites More sharing options...
1qwk767 Posted April 17, 2009 Report Share Posted April 17, 2009 Pull the MPI fuse do another compression test I believe stock comp numbers for that motor is like around 150-160 and service limit is anything below 110psi so the leaking caps can be ruled out since you replaced them. does the tach move when try and crank the car? depending on the tach moving that could mean a bad ecu. check the cam angle sensor, it could of slipped out of adjustment or went bad, I may have a spare one out in the garage if you want I can swing out tomorrow or Sunday to help diag if you havent gotten the car running Quote Link to comment Share on other sites More sharing options...
im faster Posted April 22, 2009 Report Share Posted April 22, 2009 ask on http://www.dsmftw.com spinz may now Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 22, 2009 Author Report Share Posted April 22, 2009 Swapped ECU, still won't start. It tried to fire today but failed. any more ideas? Quote Link to comment Share on other sites More sharing options...
turbospec29 Posted April 22, 2009 Report Share Posted April 22, 2009 Mine did something like this when the cam angle sensor went bad. I knew nothing about the car though and just sold it, maybe the problem? Quote Link to comment Share on other sites More sharing options...
FourString Posted April 22, 2009 Report Share Posted April 22, 2009 I am wondering how people in this thread thought that replacing the capacitors in the ECU would somehow fix the extreme loss of compression. ? Quote Link to comment Share on other sites More sharing options...
TA In Progress Posted April 23, 2009 Report Share Posted April 23, 2009 A friend of mine had a very similar issue with his 90 TSI Talon. He drove it work and everything was good. When he started it after work, it fired and ran for about a second or two and then died. Once we tore into it, we found the timing belt was loose and 8 bent valves. The timing tensioner randomly took a shit and the belt came loose and that was that. Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 23, 2009 Author Report Share Posted April 23, 2009 i actually checked the timing belt. it's not loose. and as far as the low compression, the car hasnt run in over a month so i cant really do a proper compression test. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted April 23, 2009 Report Share Posted April 23, 2009 so you havent done the wet test? use some trans fluid in it, and wet test it. Quote Link to comment Share on other sites More sharing options...
wnaplay1647545503 Posted April 23, 2009 Report Share Posted April 23, 2009 so you havent done the wet test? use some trans fluid in it, and wet test it. He lives across the street from me, your so close now he should just have you come get it Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted April 23, 2009 Report Share Posted April 23, 2009 that belt doesn't have to be loose to have wasted the head it could have just slipped make a paint mark on the belt and turn the engine over by hand one full turn and look for missing teeth it doesn't have to slip much to bust shit up Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 26, 2009 Author Report Share Posted April 26, 2009 that belt doesn't have to be loose to have wasted the head it could have just slipped make a paint mark on the belt and turn the engine over by hand one full turn and look for missing teeth it doesn't have to slip much to bust shit up I checked for missing teeth already. That was one of the first things I thought of. But it never made any noises like it was eating its own valves, and the spark plugs were undamaged. I tried to start it Friday before leaving for Myrtle beach (posting from hotel now, bout to go to beach!) and it actually fired, ran for 2 secs then promptly died again. It's GOTTA be a bad sensor me thinks. Anyone have a crank position sensor I could use for trouble shooting? Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted April 26, 2009 Report Share Posted April 26, 2009 He lives across the street from me, your so close now he should just have you come get it id be more then happy to check it over for him. that is on him Quote Link to comment Share on other sites More sharing options...
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