SOURCE: 1999 GMC Safari
Check for moisture in the distibutor cap and dry it out. Also check for a spark at the sparkplugs when you get it running. The spark must be blue, not yellow. Replace coil if it's yellow.
SOURCE: 97 GMC Safari Cargo: engine turns but will not start
Safari's tend to have problems with the rotor button on the distributer. Your's may be going bad. At first the van will stall as you described, due to a jarring of the motor, ie: a bump. etc., and then it will restart.
After a while the rotor button will fail completely.
I have had this same problem with two safar's and this is the solution that I have found.
SOURCE: 1998 GMC Sierra- runs rough then stalls when
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
SOURCE: 1994 GMC Sierra 1500 6.5 diesel runs for awhile then stalls
check your pmd switch. i had mine changed and it runs great. the problem is that it gets too hot and burns it up. be sure to move the pmd swith on the firewall away from the injection pump.
SOURCE: 1995 safari van w stalls when giving it gas.
maybe your iac valve is not working? it takes place of a choke or temp sender to computer could be bad which controls t I.A.C. known as the idle control valve,do you have any codes?
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