rpslaughter1982 Posted April 12, 2007 Share Posted April 12, 2007 I've recently put together a single build for my supe. I'm running a PHR stage 1 turbo and an AEM ecu. a couple of weeks ago I got the car started and went for a drive. It was running rich (around 10.5) but i didn't drive it for long and then parked it back up. I started it again about a week later to adjust the fpr. It didn't start so easy this time and was very lumpy. I only ran it for a couple of minutes and turned it off. I tried to start it yesterday and it wouldn't start at all. The engine turned over without a hint of any cylinder firing and then a massive backfire. Ive taken all the plugs out and they were very wet. I did a compression test and all seems ok (170psi). Spun the engine with no plugs in to push out excess fuel and then left it overnight. Today, plugs back in and the engine sounds like it is just about to start but then dies and backfires. Any takers? I don't think its bore wash due to the compression test and it's not making any weird noises. I don't know if I have a problem with my idle control valve? Could anyone tell me exactly how this works? All help is appreciated, I am an amature so feel free to correct any wrong assumtions or details I have given! Link to comment Share on other sites More sharing options...
absz Posted April 12, 2007 Share Posted April 12, 2007 have you tryed to reinstall the aem software/map to see if it makes a difference ? Link to comment Share on other sites More sharing options...
rpslaughter1982 Posted April 12, 2007 Author Share Posted April 12, 2007 have you tryed to reinstall the aem software/map to see if it makes a difference ? I have re-installed the map but that doesn't seem to have helped. Does anyone else have a similar map I could have a look at to compare? Im running 650cc Sard injectors, walbro fuel pump, fmic. Anything similar would be helpful Link to comment Share on other sites More sharing options...
Ian C Posted April 13, 2007 Share Posted April 13, 2007 Did you put clean spark plugs back in? Link to comment Share on other sites More sharing options...
rpslaughter1982 Posted April 13, 2007 Author Share Posted April 13, 2007 Did you put clean spark plugs back in? yup. what fuel pressure to people run at idle? Link to comment Share on other sites More sharing options...
Homer Posted April 13, 2007 Share Posted April 13, 2007 yup. what fuel pressure to people run at idle? Stock is 33 to 38psi, most singles run 38psi so check that (make sure you do the the correct way by bridging the diag port and not when the engine is running) Link to comment Share on other sites More sharing options...
rpslaughter1982 Posted April 14, 2007 Author Share Posted April 14, 2007 Stock is 33 to 38psi, most singles run 38psi so check that (make sure you do the the correct way by bridging the diag port and not when the engine is running) I didn't know that! I have an aeromotive FPR and set it by taking off the vacum and setting it with the car running on a fuel pressure guage. Any chance someone could give me a 'how to' on setting it correctly? Link to comment Share on other sites More sharing options...
Guest D4T Posted April 14, 2007 Share Posted April 14, 2007 Hey mate, its Phill I think "oops" maybe an appropriate word but check this out: http://www.mkivsupra.net/vbb/showthread.php?t=74014 I found LeeT's reply quite interesting, does sound like the problem could be lack of pressure now then.... Ta, Phill Link to comment Share on other sites More sharing options...
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