Having problems with your 1996 GMC Sierra ?

P0300 code on scanner showing random misfires on my 1996 GMC sierra, 5.7 liter motor, gas line pressure at 55 psi at idle. Replaced fuel pump and filter, MAF sensor, both post O2 sensors, EGR valve, crankshaft position sensor, timing gears and chain. Sometimes switches from P0300 code to P0305. The manifold gasket is showing a leak. Any ideas?

Posted / edited by AnonymousUser on : 19-07-2021

Answers :

Repair Help & Product Troubleshooting for 1996 GMC Sierra

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