testing EGR & IAC

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testing EGR & IAC

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Blazer Forum >> Mechanical & Maintenance >> General Tech Help >> 1st Gen (1983-1994) Tech >> testing EGR & IAC

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testing EGR & IAC - 10/16/2007 3:53:58 PM

Whutdidyousay

Posts: 24
Joined: 10/9/2007
Status: offline

'93 GMC Jimmy 4x4 4-door auto with the cpi vortec v-6
Is there a way to test these? I'm showing trouble codes that seem to indicate faults with these 2 parts... I don't wanna shell out $190 for an EGR valve if it's not really broken.

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'93 GMC Jimmy (Jamie)

Post #: 1

RE: testing EGR & IAC - 10/16/2007 5:09:53 PM

swartlkk

Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

The electronic EGR valves typically don't go bad, but rather clog. You may want to try removing both the EGR valve and the IAC valve and give them a good cleaning with a sensor safe carb cleaner. An EGR gasket with an integrated screen can be purchased that will reduce the tendancy of carbon deposits from hanging up the EGR valve.

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Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to Whutdidyousay)

Post #: 2

RE: testing EGR & IAC - 10/16/2007 7:50:29 PM

Whutdidyousay

Posts: 24
Joined: 10/9/2007
Status: offline

Thanks for your help swartlkk, I plan on ripping it apart and cleaning them tomorrow, hope it helps my truck.

_____________________________

'93 GMC Jimmy (Jamie)

(in reply to swartlkk)

Post #: 3