2001 Chevy Tahoe Tahoe won't run

HARRINCL

MEMBER
2001 CHEVROLET TAHOE
V8
4WD
AUTOMATIC
140,000 MILES

My wife was returning home from store. Tahoe lost power then died. Replace alternator after bench test. Disconnected Mass air flow connector. Started but then died shortly after. Suspect TPS Sensor failure, ignition control module failure, or Mass air flow sensor failure. Could you point me in the right direction?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Does it crank over and refuses to start? If so do below to determine if its fuel or spark problem and get back asap.

Get a starting fluid or ether and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, 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, distributor pick-up coil, ignition control module, cam and crank sensors- Note: If it doesn't apply disregard it

Stalling could be caused by idle air control valve/throttle position sensor, crankshaft position sensor and the items you've mentioned. Also a failing fuel pump