I have an 88 Olds Frienza I drive to work in. Lately the gas gage goes way high, about 1 inch above full almost every time I turn on the ignition, but is intermittent. Banging hard on the top of the dash a few times usually brings the reading back to normal. Sounds to me like a maybe a ground is loose, or maybe there is a mechanical vibrator-like voltage regulator that is sticking closed. Any ideas on what to check?
anyone know how gas gauge wiring is on 88 Olds Frienza?
Jan 15, 2004
3 Replies
Not sure about the 88 Frienza, but from 90 Toronado...
The guages have: Grnd, Signal, Ref 12v. The only way to have a guage go beyond full is if the signal is higher than the reference. I would check for a +12v line problem....is something drawing to much current in the IP circuit?
I recommend improving grounding. A few jumpers can make a big difference in an old car driven on salty roads. Start with a jumper from block to frame. Protect that expensive alternator by making sure bracket paint has been scraped from contact areas.
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required