Booztd 3 Posted April 3, 2008 Share Posted April 3, 2008 Guys My car WILL NOT fire on cyl 4, and I've troubleshooted just about every last thing I can think of. I see the injector pulsing on the AEM software, however the cylinder still isnt firing, and I have verified I have compression and spark. The CAS is what tells the AEM when to fire the injector and I'm wondering if my CAS is going bad, and telling the AEM to fire the injector at the wrong time. That being said, does anyone have an R32/R333 CAS that I could borrow for this test? Thanks Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 3, 2008 Share Posted April 3, 2008 i might be able to get my hands on one i have a buddy that just sold his gtr and has some parts left over. Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted April 3, 2008 Author Share Posted April 3, 2008 i might be able to get my hands on one i have a buddy that just sold his gtr and has some parts left over. Ok, just let me know, im looking to get it ASAP Thanks Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 3, 2008 Share Posted April 3, 2008 k if mine was still stock i'd let you borrow it but mine is modified for my haltech so i dont think it will work with the stock ecu. I'll call him tonight and see if i can grab it in the mean time let me know if u get one. Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted April 3, 2008 Author Share Posted April 3, 2008 I have an AEM, so I doubt it would work Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 4, 2008 Share Posted April 4, 2008 sorry boosted, he got rid of his extra parts Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted April 4, 2008 Author Share Posted April 4, 2008 sorry boosted, he got rid of his extra parts No problem, I got the car running tonight, dont really know what I did to fix it either... Quote Link to comment Share on other sites More sharing options...
Careless Posted April 4, 2008 Share Posted April 4, 2008 sneezed? coughed? turned the key this time?! what was it!??? lol. Quote Link to comment Share on other sites More sharing options...
Racinjitter Posted April 4, 2008 Share Posted April 4, 2008 Could your igniter be going bad? Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted April 4, 2008 Author Share Posted April 4, 2008 The igniter only sends signal for the coils, and in this case, I wasnt getting fuel to cylinder 4. Honestly I dont know what fixed the issue....I wish I did though! Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 4, 2008 Share Posted April 4, 2008 gremlins those sly lil buggers did it get wet lately? i had a problem with one of my sensors having a bit of condinsation in it and it got on the wheel kinda covering some of the windows making it run like crap. I took it apart and found the water, dried it out and ran like a top Quote Link to comment Share on other sites More sharing options...
synthtk Posted April 14, 2008 Share Posted April 14, 2008 I had an issue when I got my car running with the engine running on 5 or 4 cyls depending how you looked at it, turned out that the injectors weren't firing sometimes.. after swapping injectors watching the ECU's injector driver with an o-scope etc the issue turned out to be in the wiring harness itself. The female ecu pins in the ecu plug on the harness were very loose for many of the pins, especially the injectors, so depending how the ecu was sitting at the time the car would run well or wouldn't. I ended up pulling every pin and just checking them to see how snug the fit was and the ones that were loose (there were many) I just crimped them down a bit and soldered the pin to the wire for good measure while I had the pins out. Simple to check, annoying to track down, might be worth a look especially since the car just started running well without doing anything. Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted April 18, 2008 Author Share Posted April 18, 2008 I figured it out totally last night. For some reason the #4 injector driver took a crap on the AEM. Fortunately the AEM has 10 injector outputs (so I have 4 spares) I took an old wiring harness, and yanked the pin and some extra wire out of it. I then put it into my RB26 harness, in the spot for the #7 injector output on the AEM. I then went into the injector configuration, turned injector 4 off, turned injector 7 on, and then corrected the injector phasing on inj 7 to match what #4 was.... Fired like a champ Quote Link to comment Share on other sites More sharing options...
synthtk Posted April 19, 2008 Share Posted April 19, 2008 I figured it out totally last night. For some reason the #4 injector driver took a crap on the AEM Ugh... I hope I never run into an issue like that with mine. Quote Link to comment Share on other sites More sharing options...
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