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1992 Taurus stalls, won't start for 20-30 minutes

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What are your thoughts on a "bad computer"... ? While I read people blaming ecus all the time, I've personally never seen them go bad.

One of the things that's odd to me is that when it stalls and acts up, and a scanner is connected it essentially crashes/locks up the scanner.
 
SpatiallyAware said:
What are your thoughts on a "bad computer"... ? While I read people blaming ecus all the time, I've personally never seen them go bad.

One of the things that's odd to me is that when it stalls and acts up, and a scanner is connected it essentially crashes/locks up the scanner.
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yeah thats weird, but its also a pre-96 computer so who the heck knows. i think chances are very small its the ecu, but you can always try a junkyard one and see if its the same
 
SpatiallyAware said:
Hmm... explain this more.. Leaky as in, constantly dumping in fuel and flooding the engine?
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Yup. Similar to the issue Toasted mentioned when his FPR failed. The failed pressure regulator was letting gasoline into the vacuum system and causing the engine to run rich. A leaking injector would be spraying all the time.

ZV
 
Ended up (hopefully) being the ECU/ECM main computer for the car.

Swapped it out with a junkyard part and so far so good... After a ~4 hours of driving it hasn't stalled, and this also completely fixed the stuttering problem I attributed to rotor/plugs/wires/etc.

However, with the new ECU the car runs perfectly but now there's a new problem.. The cooling fan doesn't come on 'low' IE the first stage, only second stage. I'm going to buy him a new ECU from a parts store to see if it fixes that. He's able to bypass this by turning the a/c on which forces the fan on, which IME means the relay etc is probably good.
 
Usually the cooling fans are controlled directly by thermoswitches and completely bypass the ECU. I'd check that before swapping the ECU again.

ZV
 
SpatiallyAware said:
Hmm... explain this more.. Leaky as in, constantly dumping in fuel and flooding the engine?
Click to expand...

Thgis. I had an 89 Oldsmobile Cutlas Calais that did exactly what you describe. It had a bad fuel injector that would get stuck dumping fuel which bogged the engine down and made it stall. No one could figure it out because it wouldn't "reset" for about an hour then you could crank it up and go again.
 
My old festiva did this! Except that was only in specific circumstances because it was carb icing. It only had to sit 5-15 minutes to drain though.
 
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