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1994 Pontiac Bonneville discharging/high idle

Tiny
LYNDAB2
  • MEMBER
  • 1994 PONTIAC BONNEVILLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 237,890 MILES
It is putting out 10.5 a battery and 11.5 at altnator
change alt x3 and battery x2 not change. Replaced positive cable to battery, checked and replaced ground connector. Check wiring, no luck.

There is no check engine light. When crank cold car starts fine idle up to 2 rpm then 30 second idle back to 1.5 rpms after car warms up the idle will slow increase till I have to shut her down or blow.

changed fuel filler, iac, maf x2, o2, plugs, all seals on motor are new and not leaking any more, change all hoses. Pcv. Thank you guy in advance. I have so much time and money in this project that I can afford to stop or keep going.
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Monday, March 31st, 2008 AT 7:37 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
It should be throwing out at the battery terminal of the alternator between 13.5volts to 15.5

Have you checked all the fuses involving the alternator see below


https://www.2carpros.com/forum/automotive_pictures/12900_alty_13.jpg

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Monday, March 31st, 2008 AT 7:47 AM
Tiny
LYNDAB2
  • MEMBER
  • 5 POSTS
Thank I have not check the fuseable links. I will do that in a couple of hours. The diagram will be very helpful up till now I have just being guessing what wire goes where and does what. So thanks so much. For your time. Ill keep u update on this project.
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Monday, March 31st, 2008 AT 8:26 AM

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