Did I kill my car? Gasoline in the oil.

[RickBlaine]

So my 91 was idling poorly...

I bought NGK plugs, gapped them proper, bought NGK wires, cap and rotor, and even installed a new valve cover gasket and spark plug gasket set. It still idled rough, but smoothed out on the highway. 0-60 mph times were slooow- as the car had no life below 30 mph.

I checked the fuel injectors with an ohm meter. 2 of them were very bad, 2 were good. I ordered 4 matched rebuilt ones from Motor Man Fuel Injection of Michigan and installed them today.

Could not start the car unless my foot was on the accelerator pedal all the way to the floor. Started the car, and grey smoke started pouring out of the exhaust system leak between the cat and the downpipe, and pretty much out the rear muffler and just "all over". Neighbors thought the car was on fire. It is not oil smoke, nor is it coolant smoke- it is unburnt gas smoke!

Pulled the oil dipstick and was SHOCKED to find it waaay above the full line, and it reeked of gasoline! There be gas in that there oil, boys.

Before all this- it idled rough, but ran OK once on the highway. Now it only runs when smoke is pouring out and I am on the gas pedal. If I take my foot off of the gas pedal it dies- so I dare not drive it.

Is it my newly rebuilt fuel injectors? MAF sensor? O2 sensor? Clogged exhaust? ECU? An oil crankcase filled with way too much fluid (oil and gas)?

Any advice would be appreciated. Thanks.

[budgetkiller]

I doubt you killed the motor. Are you running stock tune and stock size injectors? Perhaps gas made it past your valve stem seals or the head gasket is blown between the oil passage. You could always double check the connectors on the fuel injectors for a signal. First thing I would check is the firing order on your spark plug wires and make sure you set the timing on the cap and rotor correctly. I would also change your oil before trying to start it again. Lol

[PapaSmurf2k3]

Change the oil immediately.
Try resetting the ECU. Maybe it is on some weird map from the old injectors being on there. If that doesn't work, pull the injectors back out and verify they are the correct size, and that no o-rings were torn during install.

[Lobo240sx]

Sounds like O-Rings on the injectors. Did new ones come with the injectors or is it the original ones? Check those out.

[RickBlaine]

Thank you gents, I drained the oil/gas mixture out of the crankcase (8 quarts total- yes, 2 gallons!) and then identified and replaced the stuck fuel injector. It smoked like crazy for a few high speed runs, then settled down.

I was worried that with all that gas in the crankcase, I may have allowed some of that oil/gas mix to seep down the valve stem seals and maybe find its way into the intake or PCV valve.- but after those few runs at wide open throttle- all is well. No oil burning, compression is excellent, and she idles like new.

Point is, if the engine is running rough, don't just assume you need new plugs and wires and drive it for a week while waiting for the delivery guy to drop off your NGK wires, plugs, and cap & rotor. It may be a stuck (open) injector.

Seriously, 2 gallons of fluid came out and smelled like Shell gasoline. I could not believe it. Bet the engine is super clean now, ha ha ha.

I will search for resetting the ECU- thank you, did not think of this. It may help as the car may have learnt some bad habits with that old faulty injector.

[PapaSmurf2k3]

Yup. Basically just disconnect the battery for 15 minutes or so.