Need thoughts on idle woes
#1
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Need other's thoughts on my idle issue...
Car is a 94 with a stock 99 motor, VICS manifold, 99 throttle body, 94 sensors and injectors. Currently running on MSPNP.
Car is idling a bit high (950-1000) and looping more than I think it should (100-150 rpms).
All symptoms point to a vacuum leak. I've replaced all gaskets and seals on the intake manifold - did not solve the problem. Smoke test did not turn up anything. Vacuum gauge sits at 22inHg at idle. Timing belt is aligned correctly.
I'm currently thinking I have an exhaust leak which is throwing off the wideband, but my tune may also be off. Fairly new to MS tuning and I'm stumped on this one. Any thoughts?
Edit: I think I'm idling on the lean side. Would that cause this? I stated with the 94 base map and added fuel all around. AFRs are in the ballpark and car suns good everywhere else.
Car is a 94 with a stock 99 motor, VICS manifold, 99 throttle body, 94 sensors and injectors. Currently running on MSPNP.
Car is idling a bit high (950-1000) and looping more than I think it should (100-150 rpms).
All symptoms point to a vacuum leak. I've replaced all gaskets and seals on the intake manifold - did not solve the problem. Smoke test did not turn up anything. Vacuum gauge sits at 22inHg at idle. Timing belt is aligned correctly.
I'm currently thinking I have an exhaust leak which is throwing off the wideband, but my tune may also be off. Fairly new to MS tuning and I'm stumped on this one. Any thoughts?
Edit: I think I'm idling on the lean side. Would that cause this? I stated with the 94 base map and added fuel all around. AFRs are in the ballpark and car suns good everywhere else.
Last edited by mx5roadster; 07-21-2019 at 06:42 PM.
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bimmeguy
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11-21-2012 09:34 AM