My suburban just stop while i was driving
And what does it do now? Does it crank over and not start, or just no power anywhere? If nothing, no power, recheck your battery connections, grounds, for something jarring loose, maybe a relay in the power distribution center (by your battery) jumped out of its socket. Gotta check around...But if it cranks over, but won't start, you need to review the basics for this condition: needs fuel and spark to run. Are you getting fuel up to the engine? Can you hear the fuel pump buzz on for 2 seconds when you turn key on? That 2 seconds is to pressurize the fuel line. When you start cranking, your pump will come on again, and stay on when engine is running. You can only HEAR the pump when someone turns key to on, and you stand or squat near the tank to listen for it, maybe with tank fill cap removed. If you cant hear the pump your FP relay would be the next place to look for a problem of no power to pump. If pump IS working, then back to engine: check if ignition (spark ) is working. Easiest way: pull spark plug wire, remove plug and put it on the wire you pulled off. Ground the threads of plug on metal of engine, have someone crank it, and watch for spark at that plug. If no spark, check another wire with same plug. No spark means you need to diagnose your ignition starting circuit. Among other things, this involves checking for power to coils, power to the computer (your check engine light DOES come on when key on, right?), a lot of things that a diagnostic flow-chart covers to pinpoint the problem. A good repair manual could walk you through it, if you have a multimeter. If not, you may need someone to help you. If you DO have both spark and fuel up to engine, it's simplified some, but still problematic. Crank position sensor? injector circuit? Good luck, M>, and don't give up.
Oct 25, 2011 |
1999 GMC Suburban