used truck i bought few weeks ago,lately its been surging after starting,like its running out of gas,but once going down road seems ok,its a 4.3 fi…any help aprreciated
While I don’t know how helpful these suggestions will be, you can try them.
Intake air (vacuum) leak
Faulty fuel pump
Faulty Idle Air Control system
Faulty emissions systems
[b]When the surging happens, and if you’re in gear, firmly step on the brake pedal, and slightly step on the accelerator. If the surging stops, suspect the idle air control circuit or a vacuum leak as suggested.
Tester[/b]