Driving down the road, 1999 SL2, the check engine light comes on and immediately loses all power. The engine is still functioning (the car still produces rpms) but there is little to no power. It drives 5 mph. Transmission shop found nothing wrong with it, cleared the codes and it worked normally for about a week then same old thing. Safe mode? PLEASE HELP ME

You have a power wire rubbing the chassis somewhere in the harness that when it slightly touches metal the voltage drops and causes the flickering and will make the computer act up. Finding exactly where the short is occurring will be a tedious and time consuming inspection of the wiring.

Thermostat needs to be replaced. Refill the coolant after the engine is completely cool. If its still hot the coolant will expand and make it look like the radiator is full. Temp light won't always come on for a thermostat issue.

The ecm does not control the dashboard lights. I would start by checking battery, alternator and starter connections. Also, Gm uses aluminum wire and to check for white corrosion on ends of heavy gage cable.

No Engine I know of has a 1,2,3,4, fitting I am sure you have the firing order connected wrong, plus your description point to the firing order as well. Cheers, Malcolm Campbell.

Prognosis is really bad, hate to tell you. Ticking comes from the valve lifters, losing lubrication due to lack of pressure and running dry. At redlights, when revs are at idle, oil pressure drops a lot, and engine really suffers. Have the vehicle taken immediately to a shop for proper diagnose and to see if engine can still be saved. The loss of power comes from the valves not actuating properly. Hydraulic lifters need oil at a decent pressure to "charge" , and if not charged, they will stay compressed, ruining valve lifting operation.

That could be why: So little air may be getting through, that it is causing it to run very rich. First thing to do, while the engine is running, spray a little of that EFI cleaner down the throttle body. Then, IMMEDIATELY, shut the engine off (You don't want tar going INTO the engine). After that, try and get the throttle body off, and CAREFULLY scrape away the road ****. Don't damage the injectors. Clean it nice, and see if it runs a bit better. Best wishes, and I'm curious how it got so much build up! It could cause worse problems down the road if there is tar in the engine ...

If wires came off oil pressure switch or if switch went bad, it would shut down truck immediately. Your oil pressure switch performs 2 functions; oil pressure to gauge.light and it's also a safety feature that if you're in an accident or rollover, when oil pressure drops it shuts off power to fuel pump. I'd start there. The reverse is also a possibility, if fuel pump fails, truck shuts down = no oil pressure.

i think its your computer. but first chek your alternator

i think there was a re call for this car & there was a problem with ignition switch. i was searching on other forums for the fix. i got a fix that there is a problem with ignition switch. so just try & replace ignition switch which would not cost u more than $100. Try it & post if your problem is fixed. Also if u have any othr solution then also fix this problem.

have them check the crankshaft sensor. sometimes they crank and when the water hits them the car dies out. its quite common on the 3.0l