Having problems with your 1998 GMC Savana ?
1998 Savana 5.7 2WD
Running very rich, excessive smoke, 2mpg, no change when mass air sensor is disconnected, codes P0102 and P0103
P0102 and P0103 here is the definition MAF low input and MAF high input, when you disconnected it you set the high input that is you, Low input well the circuit internally or externally is broken, you ll need a new MAF and that all there is to it, I know I have to say check this and that and not be so direct but use common sense A ECM total blind sided failure and broken circuit can be the cause go to a dealer go to a shop do this and do that Here replace mass air flow sensor its black smoke black smoke is MAF reference voltage less the 1 vlts that is low input full injector pulse width or high input 5vlt reference full injector puilse width
Repair Help & Product Troubleshooting for 1998 GMC Savana
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