FUEL

  • Tiny
  • Ray Malibu
  • 1995 Oldsmobile Delta 88
  • 125,000 miles

ENGINE SEEMS NOT TO BE GETTING GAS I CHECKED FUEL PRESSURE AND IT WAS 44 PSI THEN CHECKED ALL INJECTOR PLUGS THEY ALL HAD 12 VOLTS RUNNING ON THEM WITHOUT STARTING WHEN I WOULD START VOLTAGE WOULD DROP FROM 6-9. COULD THIS BE A BAD ECU?

Sunday, May 5th, 2013 AT 2:11 PM

5 Answers

  • Tiny
  • JDL
  • Expert
  • 16,236 posts

When you first turn they on, no crank, You should have close to battery voltage on both sides of injector, because there is no ground. What color wire were you testing at the injector? Do you have an injector pulse, engine cranking? Does the battery have a full charge?

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Sunday, May 5th, 2013 AT 2:38 PM
  • Tiny
  • Ray Malibu
  • Member

THERE IS NO PULSE ON ANY INJECTOR AND THE BATTERY HAS FULL CHARGE. THERE IS SPARK I PUT 12 VOLTS ON INJECTORS THEY ALL CLICK AS SHOULD AND LET FUEL PASS BY WANTS TO START WHEN I DO THAT THAT'S WHY I THINK IT'S THE ECU.

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Sunday, May 5th, 2013 AT 5:49 PM
  • Tiny
  • JDL
  • Expert
  • 16,236 posts

My first thought is to look for rpm signal, if computer doesn't see that, no injector pulse. You shouldn't have to add voltage to injector, the pink wire goes hot when you turn on the key.

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Monday, May 6th, 2013 AT 9:14 AM
  • Tiny
  • wrenchtoss
  • Member

Ecm applies grounds to activate injectors it uses the ignition module to time them
check the ignition module it should be easy to get to on this model.

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Tuesday, May 21st, 2013 AT 5:39 PM
  • Tiny
  • JDL
  • Expert
  • 16,236 posts

Sounds good to me.

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Saturday, June 27th, 2015 AT 9:49 AM

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