weird idle help!

Discuss the RB20, RB25 and RB26 series engines.
Real Boring 240
Posts: 56
Joined: Sat Mar 06, 2004 2:44 pm
Car: RHD RB25 240

Post

Hey Guys, I got a question. For some reason, i can't get my rb25 to idle good. I checked timing with the timing gun but somehow think i may have screwed that up somehow because it seemed to run worst at 15 degrees. And not only that, it seems to run best when almost fully cranked left? I tried to adjust the idle air screw and that seemed to help but still not that great. I don't see/hear any vacuum leaks (my gauge reads 18-20).

Now, i do have the greddy intake manifold, Q45 Throttle body, and front mount. The TPS reads 5.17 on one prong, and .47 on the second and ground on the third(im trying to remember this off the top of my head so i could be off on those numbers)

Basically, im wondering if because of the greddy manifold and the q45 TB, could disrupt the RB25 idle? I also seem to not be making optimum horsepower but i never did believe in arse dyno's so mine could need some recalibration:pface any idea's could be useful or atleast if someone has the same setup can you verify no idle problems? thanks alot in advance.

Rafael Gonzalez


goofynick6
Posts: 1216
Joined: Thu Feb 05, 2004 9:58 am
Car: 1995 S14.5 RB20DET

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Maybe the reverse voltage of the q45 tps is messing you up? Unless you have fixed that. Or maybe your not doing the timing right? How'd you time it?

Nick


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