fearless602 Posted January 4, 2009 Share Posted January 4, 2009 I posted before about an oil leak in the #3 cylinder. I ended up just doing a swap, I put in a newer D15. It runs strong, the only problem I have is it revs up at idle. It jumps from about 1000 rpms to 1800 rpms and drops back down, and it does it constantly and only at idle. I am guessing it is either an O2 sensor or a vacuum leak. I know it is a problem with the older motors. I was just wondering if anyone would be able to tell me the best place to start. i already spraid the motor down with water in a spray bottle to try and find a vacuum leak, but it didnt affect the motor at all. thanks Link to comment Share on other sites More sharing options...
Kastigir Posted January 4, 2009 Share Posted January 4, 2009 I posted before about an oil leak in the #3 cylinder. I ended up just doing a swap, I put in a newer D15. It runs strong, the only problem I have is it revs up at idle. It jumps from about 1000 rpms to 1800 rpms and drops back down, and it does it constantly and only at idle. I am guessing it is either an O2 sensor or a vacuum leak. I know it is a problem with the older motors. I was just wondering if anyone would be able to tell me the best place to start. i already spraid the motor down with water in a spray bottle to try and find a vacuum leak, but it didnt affect the motor at all. thanks IACV Link to comment Share on other sites More sharing options...
fearless602 Posted January 5, 2009 Author Share Posted January 5, 2009 i fixed the reving part, the big hose that comes out of the IACV was sucking alot of air, the guy i got the car from had that hose completley blocked for some reason, but when it is blocked the idle doesnt fluctuate. I checked and it is putting out a couple codes, 2 for a map sensor and 2 for a IACV, is there any way I can check those? I just dont feel like spending $500 on parts if I dont have to. Link to comment Share on other sites More sharing options...
Kastigir Posted January 5, 2009 Share Posted January 5, 2009 i fixed the reving part, the big hose that comes out of the IACV was sucking alot of air, the guy i got the car from had that hose completley blocked for some reason, but when it is blocked the idle doesnt fluctuate. I checked and it is putting out a couple codes, 2 for a map sensor and 2 for a IACV, is there any way I can check those? I just dont feel like spending $500 on parts if I dont have to. If it's no longer surging, reset the codes and drive. If the CEL comes back on, pull the codes. Link to comment Share on other sites More sharing options...
fearless602 Posted January 5, 2009 Author Share Posted January 5, 2009 thanks for the info, i will try that Link to comment Share on other sites More sharing options...
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