Question about 1993 GMC Safari
All an engine needs to run is air, fuel, spark, and timing. You appear to be getting fuel. Pull a plug and reconnect it to the plug wire. Ground it to the engine away from gas and fumes and see if you get a good hot blue spark. If so cover the intake with your hand and turn the engine over. If you feel vacuum then you are probably getting air. If all of these things are okay then you are most likey looking for a timing issue. This could be mechanical like the timing belt or chain, valve train and cam(s), etc... It could also be the engine management systems including camshaft positoin sensor, mass airflow sensor, etc... I am assuming the van has the 4.3 Liter V-6 common for that model.
If it backfires it is probably getting spark maybe not at the right time. If these simple checks pan out you probably need to refer this problem to a mechanic.
Posted on Nov 14, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 02, 2015 | 1997 Chevrolet Suburban
Jun 13, 2015 | 1997 Jeep Grand Cherokee
Feb 01, 2015 | Cars & Trucks
Dec 10, 2013 | Pontiac Firebird Cars & Trucks
Jun 13, 2011 | 1991 Chevrolet Cavalier
Oct 23, 2009 | 1999 Chevrolet Lumina
Feb 05, 2009 | 1988 Dodge D-Series Pickups
159 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: