MS3 Idle Misfire ????????? HELP!!!!!
4 Attachment(s)
Ok guys, I've got a Rev built Basic MS3 I have been extremely happy with. The only thing that's driving me crazy is a warm idle misfie I can't get rid of. Car runs great otherwise but the idle misfire is annoying as hell.
I've tried richer/leaner, faster/slower, different dwell settings, new plugs, different throttle body, different ignition timing, sequential/batch fuel......................don't know what to try next. The rest of the rev range, car runs great with no issues. With the original MS1PnP never had an issue with this. This has got to be something simple I'm overlooking. I remember Brain complaining about this at one point but didn't see a solution when I searched. Any ideas/help would be greatly appreciated. :vash::vash::vash: Attached is an idle log and my current tune |
Needs more info:
- Is the MS the only thing you changed when this started happening? - Ignition system? - plugs? - injectors? |
Assuming his sig is accurate: 460cc inj, COPS
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Originally Posted by stefanst
(Post 1050391)
Needs more info:
- Is the MS the only thing you changed when this started happening? - Ignition system? - plugs? - injectors? |
Originally Posted by skipstr
(Post 1050369)
I remember Brain complaining about this at one point but didn't see a solution when I searched. Any ideas/help would be greatly appreciated.
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Originally Posted by Braineack
(Post 1050434)
My issue was my TB tensioner wasn't tensioned, so the timing was getting all out of whack.
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How much dwell were you running on the MS1?
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Originally Posted by Matt Cramer
(Post 1050863)
How much dwell were you running on the MS1?
2.8 running .5ms minimum discharge period |
seems pretty low for stock coils, IIRC you should be at 5.0 running.
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Originally Posted by Braineack
(Post 1054557)
seems pretty low for stock coils, IIRC you should be at 5.0 running.
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then that's high for them; should be 1.9-2.1ms.
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