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No Start -injector pulse? 700

posted by  Steve on  Tue Mar 8 00:13 CST 2005
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I had a similar problem: applying a Bosch-specific noid light at the injector harness showed that the pulses shut down at 1200 rpm. The only fix was a new ECU. This I concluded after checking everything else in sight.

You can check the wiring harness and radio supression relay placing a meter on the green supply wire to one injector (the grey wire goes to the ECU and thence to ground) and grounding the neg terminal on the engine block. Crank it and look for a pulse. If you get a pulse, then you know the radio relay has +12V from the battery, the ECU is supplying +12V to the other side of the relay and the wiring harness is OK. If that's the case, then your ECU grounding circuit is shot.

Which model ECU, by the way? These 1990-vintage ECUs seem to be dropping like flies. You should consider having the old one rebuilt by one of the Web rebuilders such as www.programinc.com so this doesn't happen again. Cost=$400 or so.






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New No Start -injector pulse? [700]
posted by  jchiodi subscriber  on Mon Mar 7 23:13 CST 2005 >


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