Intermittant EGR failure HELP?? - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

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Intermittant EGR failure HELP??

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Old 03-09-2005, 12:13 AM
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Default Intermittant EGR failure HELP??

1988 Vin C 243XXX miles

I get the EGR codes 63, 64,65 after I go over the crest of a hill, at the same time that my converter unlocks. This is the only time I get these codes. I ran the test that the FSM called for on the EGR, results were fairly close to specs. I am thinking these codes are being produced by the lockup converter somehow. I recently cleaned the IAC.

Anybody got any clues??
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Old 03-09-2005, 12:48 AM
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Occasional short in the harness ?
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Old 03-09-2005, 12:54 AM
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For all 3 solonoids? I'd bet more on the ground. It won't be related to the TC unlocking at all. It'* strictly vacuum controlled on your year.

My suggestion is to clean the shafts and springs on the EGR and re-lube them with a temp-resistant lube. It can be done in place without removing it.
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