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1995 Pontiac Bonneville 1995 Bonneville starts then dies in

Tiny
PILONA42
  • MEMBER
  • 1995 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
I have a 95 Bonneville and when I start it she runs great. For a few seconds then abbrubly dies. It is throwing codes but because this is the crossover year I dont have the adapter cable to read them(OBD1 plug OBD2 codes). The idle air control valve was making a bunch of noice when I cycled the key so I replaced it and still the same problem. If I hold the RPM's up it will stay running. Is this a TPS problem?
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Wednesday, March 10th, 2010 AT 12:15 PM

4 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
My databases are not always correct, but, it shows a 16 pin data link connector and says, obd2. Maybe you need to take the throttle-body off and clean it, if you haven't already. How long since over-all tune-up?
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Monday, November 5th, 2018 AT 7:10 PM
Tiny
PILONA42
  • MEMBER
  • 13 POSTS
Unsure on the last tune up as I recently aquired the vehicle. I dont think it needs plugs or a coil though because when it runs it runs well. When I tested the TPS the ohms went down as I turned it up. Arent they supposed to go up?
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Monday, November 5th, 2018 AT 7:10 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I can't tell about your testing? Wire colors at the tps, dark blue wire is signal, gray wire is ref voltage around 5 volts with the key on. Black wire is ground. With a digital multimeter ground one lead, backprobe the dark blue wire with the other lead. Turn the key to on, no need to go further. Watch the voltage, as you open the throttle, the voltage reading goes up.
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Monday, November 5th, 2018 AT 7:10 PM
Tiny
MARK BROOKS
  • MEMBER
  • 2 POSTS
Check for ground at grounding strip under floorboards on driver and pass sides.
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Monday, November 5th, 2018 AT 7:10 PM

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