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1985 Oldsmobile Regency fuel injectors not working

Tiny
JORGE E PEREZ
  • MEMBER
  • 1985 OLDSMOBILE REGENCY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 195,221 MILES
No pulse in conectors, I have replaced ign module, coil, pick up coil, checked computer, fuses, sensors, wiring con, car doesn't even try to start. Started like a spark plug wire or coil missfire. Is a 3.8 VIN 3 PFI. Fuel pump press is 40 psi. Before it ran like a nice engine really smooth. Scanner says all is OK. What is the problem with the injectors? I get 12volts at the inj.S conectors. Dist checks OK
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Saturday, November 21st, 2009 AT 1:52 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum, does your scanner show live engine data? With the engine cranking, is there an rpm signal? Without an rpm signal, the computer won't ground the injectors. The purple wire with white tracer from the distributor to pcm carries rpm signal. Engine cranking, there should be a pulse on that wire.
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Saturday, November 21st, 2009 AT 2:10 PM

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