Car missing check engine light on

HDGP

MEMBER
OLDSMOBILE

I have a 96 Oldsmobile Cutlass Supreme with a 3.1L with a 146000 miles on it. The check engine light came on and it start run rough so I took it Autozone and had them put the scanner on it. It said it was either the coil or the injector on the #1 cylinder. I checked the coil it was good and I got spark so I replaced the injector but still same problem, so I ohm'd the new injector the old injector and the #2 injector the all ohm at 12.3. So I swaped the #2 with the #1 still same problem. I ran the motor with the #1 spark plug removed and all that came out was alittle bit a mosture but no fuel. Now I am getting a lot of white smoke and alot of mosture out of the exhaust (head gasket?) And my coolant looks like crap but it is 100000miles old. I find it hard to believe that I lost (have) a injector problem and loose a head gasket all at the same time. Any help would be welcomed. Thanks

3 Replies

MERLIN2021

MECHANIC
17,250 POSTS

You need a compression test and or coolant system pressure test, some computers turn off injctors on non firing cylinders, 100,000 on coolant? Shame on you! This cooling system will require major flushing! After the #1 cylinder is fixed. If it is a head gasket, you'll have to drain it anyway!

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Saturday, September 22nd, 2007 AT 4:33 PM

HDGP

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9 POSTS

Could the mosture be from the compressed air in the cylinder that is not firing, the exhaust does not smell like rad-fluid I also read onile that the white smoke could be from messed fuel flow/preasure partialy caused be a blockage in the fuel rail. The white smoke was barely noticable when I started working on the car and got worse when I put a little bit of air to the fuel rail through the crossover pipe that I removed that conects the front fuel rail to the rear fuel rail. Is it possible that made the blockage worse? I will do comp-test today and compare the readings to the front cylinders. From what I have heard GM 3.1L are known for loosing injectors and getting blockages on the #1 injector because of the dog-leg head-head design of the fuel rail. Thanks for the reply and help.

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Sunday, September 23rd, 2007 AT 5:36 AM

HDGP

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9 POSTS

Yes it turns out the head cracked between the valves on the #1 cylinder. The cooling passages around the cylinder plugged. So take it from me flush your cooling system.

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Friday, November 23rd, 2007 AT 12:11 PM