Question about GMC Yukon Denali
You must clean the filter gas+tank+and system fuel. see the diagram attached.
God bless you
Posted on Jul 09, 2013
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Posted on Jan 02, 2017
your gas tank needs flushing out,maybe got gritt inside. carburator needs filter needs cleaning .,possible air leak from gaskets., what about distributor breaking down
Posted on Jan 29, 2009
This sounds like a vacuum control problem. Since part of the problem is when the engine is cold; a thermal switch is venting vacuum until the engine warms up enough to shut down the thermal switch, thus restoring a steady idle. Vacuum can be affecting high rpms while running too. You could have a misrouted EGR vacuum line opening the valve at the wrong time. There are sometimes hose routing decals on the radiator shroud or under the hood. These can be visibly checked.
Posted on Apr 20, 2009
38 psi is high ??? MMmmm ..regulator... but you need spark check the coil make those plugs arc see them flash ....advance the distributor a lil just a inch ...
Posted on May 08, 2009
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