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Old 03-08-2001, 01:42 AM   #1
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If the computer is bad will the car still run?

I know that my fuel pump is bad, and the computer may be bad also. If i replace the fuel pump, but the computer is bad will the car still run? Need to replace the fuel pump this week to get it running again.
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Old 03-08-2001, 09:59 AM   #2
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From my experiences....NO. The computer controls fuel delivery, and therefore since it's not telling the delivery, your engine's not getting any....
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Old 03-08-2001, 10:31 AM   #3
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It depends on what part of it is bad. Sometimes the car will run fairly good, ****ty as hell or not even start. It all depends...

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Old 03-08-2001, 01:01 PM   #4
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If there is a computer problem, the car will sometimes go into Limp Home mode.
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Old 03-08-2001, 11:40 PM   #5
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A bad computer can do just about anything, it depends what's wrong with it. Sometimes the car won't run at all, and other times it'll run, but in limp-home mode. Or it could be intermittent, like mine was. The computer would spontaneously cut out the injector pulses, but then work fine a few minutes later. I'd say to put the new fuel pump in and see how the car runs after that.
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Old 03-09-2001, 03:05 AM   #6
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The mechanic said it was giving an intermittent Signal to the fuel pump relay. So with that said do you think it will still run?
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Old 03-09-2001, 08:47 AM   #7
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Now the question is what is the cause of the intermittent signal? My suspicion would be a short/break in the wiring from the ecm to the fuel pump more than the ecm itself. Do the fuel pump first as they commonly go.

Generally, when I have had "electronic" things go; they just die.

Get an ecm from a wrecking yard (a lot cheaper there) and try it out if you have doubts about your ecm. You don't mention what engine you have, so I can't mention other potential donors. With TPI, you can snaffle the ecm out of a early SD MPFI V6 out of virtually any GM car (except W bodies).

Thus a Lumina, Corsica or Berretta (along with V6 Firebirds) are all potential donors. I know that the 7730 ecm from a Lumina is like $20-$25 where as a 7730 ecm from a SD TPI V8 F-body is more like a $100 from the wrecking yard. Same ecm, just more money.
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Old 03-09-2001, 09:08 AM   #8
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Just go to Autozone to get your ECU. A friend of mine picked his up for $80
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Old 03-09-2001, 09:08 AM
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