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Check the OBD-1 for faults? 200 1989

posted by  Dave Stevens on  Mon Oct 9 01:31 CST 2023
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last visit: Sun Jan 1 02:36 CST 2012
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Unmetered air intake is always a good thought for general rough running. An out of sight split on the underside of the bellows was my next thought, but you checked that. TB gasket or intake manifold gasket leak? Split, loose fitting or accidentally disconnecter rubber hose? Plug off the TB ports to see if that makes a diff. Disconnect the AMM and restart to see if "limp home mode" is an improvement, pointing the finger at the AMM. Does it smooth out a bit if you raise the RPM say up over 2k, or does it get worse?
--
Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now






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New Idle and run issue [200][1989]
posted by  TONY H subscriber  on Tue Oct 3 16:08 CST 2023 >


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