Question about Chevrolet Suburban 1500

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99 Chevy suburban code #1 c0310, #2 c0323, #3 91...it just had an engine replacement and does start idles smooth at first but as it warms up it gets rougher w a little shake

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Those codes are for your 4X4
C0310 is for Motor A/B Circuit Open
C0323 is for T-Case Lock Circuit Low

Check the wiring harness for loosness or possible broken wires. or dirt in the connectors. These codes should have no affect on how the engine runs.

Posted on May 26, 2011

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Posted on Jan 02, 2017

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I have a1997 suburban 5.7 eng. hesitates and backfires on rapid acceleration.


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93 chevy suburban v-8 tbi hard to start, but starts, will run but will not idle, can keep it running or driving as long as you rev engine constantly. Holding engine at half throttle it will slow and die. ...


Assuming your engine is in good mechanical condition, there are only a few options.

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http://check-engine-light-codes.blogspot.com/2006/03/gm-1983-95-vehicles-obd1-codes-self.html

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1 Answer

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Sounds like either Air mass sensor, Air mass meter or finally the EGR valve this is the exhaust gas recycler I would say that is the fault when they start to go this is what they do until finally the car will barely move.

Also I would check all your air pipes for leaks make sure there is no rips or tears in the pipes, The car will drive fine like you say until you ease of the gas to a stop position it **** in to much air and kills the engine. Air faults are cheaper so look there first.

Hope this helps

Regards
Dan

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1 Answer

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