What else could I try?

MATTWEISERPLUMBING

MEMBER
1990 CHEVROLET TRUCK
6 CYL
4WD
MANUAL
210,000 MILES

90 chevy 1/2t 4x4, 6cyl, wont start, I started this mornin to warm up & it quit after 10 minutes. I replaced coil and checked TBI fuse but they seem to be ok. I lightly tapped on fuel tank to maybe unplug debri from electric pick up pump, it still won't start. Need help only vehicle I have to get to work.

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Do you have a check engine light and last tune-up?

Do below to determine if its a fuel or spark issue-

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing