305/700R4 Issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*JCampbell* · 08-25-2012, 04:56 PM

Just picked up an '84 C10 shortbed and I noticed a few things right off the bat.

1st: Intermittent SES light at idle/stop-and-go driving. Clears itself after I get on the highway for a few miles. Smells a little rich at idle. Do these trucks have an ECM/diagnostic port? (I didn't think they did)

2nd: I belive it's a 700R4 trans, correct? Trans is "hunting" at low speed/rpm. Like after rolling a stop sign, it stays in 2nd, then drops to 1st, then back to 2nd quite suddenly. Not sure what to make of it.

Any thoughts?

Gratuitous pic opportunity:

08-25-2012, 04:56 PM	#1
JCampbell Account Suspended Join Date: Apr 2008 Location: Hesperia, Ca Posts: 1,332	305/700R4 Issues Just picked up an '84 C10 shortbed and I noticed a few things right off the bat. 1st: Intermittent SES light at idle/stop-and-go driving. Clears itself after I get on the highway for a few miles. Smells a little rich at idle. Do these trucks have an ECM/diagnostic port? (I didn't think they did) 2nd: I belive it's a 700R4 trans, correct? Trans is "hunting" at low speed/rpm. Like after rolling a stop sign, it stays in 2nd, then drops to 1st, then back to 2nd quite suddenly. Not sure what to make of it. Any thoughts? Gratuitous pic opportunity:



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