This car runs great until warm it seems and then will die without any sign its going to die. I try and start it and it will crank but not start. Sometimes it will start and then die right away. If I wait an hour or so it will start and do the same thing. I have been running it in the driveway on idol and I get the same ending.
I have replaced the #103 fuel relay. The main relay on the radiator seems to click on and off normally. I checked the fuel injectors and they look fine. I disconnected the hose on the fuel pressure regulator and it spews out a lot of gas when I turn the key to position 2.
I don't know If its the fuel pump. If so the part costs $363 and thats to much.
The car does kick out a lot of thick white smoke. I have fixed all main leaks that I could find but I did get a code for Max enrichment on O2 sensor. Would the O2 sensor be causing it to die when warm? Is it possible to clean an O2 sensor?
Thanks for any help or advice

Just for a recap. I did get a cheaper O2 sensor from Rockauto.com it is even a good Bosh upstream one. It saved me about $70. I put it on, reset the codes and it seems to have fixed the problem.
Thanks for all the info and help!

If you disconnect the vacuum line on the fuel pressure regulator and gas comes out of the regulator when your key is in position 2 the regulator is bad and that's your problem although this should cause black smoke....

The mass air flow meter, coolant temp sensor and oxygen sensor determine fuel mix. Your maf could be bad....

I have just replaced the MAF sensor. I think I killed the o2 sensor. So that will be next. Thanks for the response.

have you ever replaced injector seals?

Is the white smoke steam from the muffler or antifreeze? does the turbo make noise at idle, because when it dies badly it will pour oil into the exhaust and cause white smoke like a cloud of fog when the exhaust gets hot.

O2 sensors cannot normally be cleaned. They operate at 500F degrees and may not be brushed or rubbed. Some claim results when soaking them in gasoline over night...

If you pull off the air intake for the turbo, you can reach in with your finger and check the turbo impeller. It should spin easily and the center should not wobble if you push on the center.

But a bad turbo shouldn't make the engine die, just lots of smoke and no pep. Check your spark plugs after the engine dies, it may be the spark plugs are saturated with fuel.
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My name is Klaus and I am a V♂lv♂holic

Thanks for the response!
I forgot to mention it is not a turbo it's a 2.4. And I think I might of killed the o2 sensor if It was even working in the first place. It was badly soot covered and I used a wire brush torch and denatured alcohol. I tried getting a reading before and after with a multi meter but got nothing. I was thinking that and or plugged catalytic converters. It runs fine until it gets hot and dies. It will start but then dies right away. Do you have any ideas or thoughts. I have no idea how to check the CAT's or which one to start with. Either way this is gonna be a pain in my gravel driveway with such low clearances under the wagon.
Thanks for any help you can give.

Oh and I did replace the fuel filter thinking that would help. Nope...
Also I'm not sure about the fuel pressure regulator if that would cause these problems?

You only have one CAT, 2 O2 sensors. Banging on the side of a cold cat with a closed fist and hearing rattling is the only way that I know of to check it. It falls apart internally and rattles. This doesn't happen very often.

Your car's timing is controlled by the front O2 sensor. What are the specific codes you got off the computer? Wire brushing the O2 sensor is not a good thing, you will need a new one. Try Amazon.com with the proper OEM part number. A cheap knockoff will not work very well. There are 2 types, one for engines with a SAS pump and one for EGR cars, make sure you get the proper one. Plug compatible.

Because the engine starts fine when cold and dies when it gets hot, could be from an over rich condition caused by the O2 sensor. A bad vacuum leak, or unmetered air getting in the manifold after the AMM/MAF.


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My name is Klaus and I am a V♂lv♂holic

Ha! Yeah I read after I used a wire brush on it not to. Thanks I'll check out amazon for a new one.
Is the CAT right behind the front o2 sensor or before the muffler? I cant even find another o2 sensor.
I have the code 3-2-4 which is camshaft sensor but I just replaced that a few months ago. I just can't seem to erase it.
Thanks for taking the time to help, I'll change out the sensor and let you know if that fix's it.

Yes, the front O2 sensor is before the cat. The rear O2 sensor is after the cat and can only be seen from under the car. If you have a rear O2 sensor, both plugs are together on top of the tranny. The grey plug is for the rear.

I assume you have EGR and not SAS ( the turbos for 1994 have SAS).

The error for the CPS could be in the plug, so check that the female end of the plug isn't pushed back and not making contact. Also ensure that the CPS wires do not get next to the plug wires as that could mess up the low voltage.
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My name is Klaus and I am a V♂lv♂holic

White smoke is usually water vapor. Are any of your plugs abnormally clean? Black smoke is typically fuel. Does the exhaust have any particular smell ?
Maxed out O2 - how is your fuel pressure regulator ? IIRC there is a port on the fuel rail for testing the pressure. Does the intake tube between the air filter and the manifold have a leak ?

Greg

Thanks for responding so quick. The smoke does have a bad smell to it. I did have a pretty big hole in the manifold going from the muffler to air filter so I replaced that. I took out 2 of the plugs and they are fairly new but not abnormally clean. They did look a little wet with gas. i don't think the smoke is antifreeze. I checked the oil and its fine.
I did pull out the o2 sensor and it was very soot covered. I brushed it off with a wire brush and hit with a torch after soaking in denatured alcohol. I couldn't get any reading off it before or after, so I probably did no good or I am testing it wrong.
I have been reading on here and I think it might be one of the CAT's getting to hot and killing the car until it cools off. But I really don't know where to start or how to tell if the CAT is bad.

Simplest way to see in the converter is plugged is to disconnect it for a short test when the engine is warm.