20 Most Recent 1990 Oldsmobile Cutlass Supreme Conv Questions & Answers

Don't waste your money on unnecessary sources and
unwanted repairs. Get this manual online at www.reliable-store.com and get complete guide on whether to repair or not, service it, and how to repair etc

1990 Oldsmobile... | Answered on Mar 07, 2018

the fan relay is activated from the ECM which gets the message from the coolant temperature sensor to switch the fans on ( more than likely the problem)
they should be running at 85 c or well before 212 F so check fuses (2) for failure and check for power to the relay as well to check if the fans are spinning freely
the fan relay will have an emblem on the cover and be situated next to the battery in the big block of relays

1990 Oldsmobile... | Answered on Jun 04, 2017

under the drivers side some were on the right

1990 Oldsmobile... | Answered on Feb 25, 2016

Not usually. Most domestic vehicles require you to remove the fuel tank to access the fuel pump/

1990 Oldsmobile... | Answered on Dec 19, 2014

No. You must lower the fuel tank.

1990 Oldsmobile... | Answered on Dec 18, 2014

double posted.

1990 Oldsmobile... | Answered on Jun 27, 2014

on this old car there are 2 ways.
pull battery neg lug.
pull ECU, memory fuse, (see FSM)

1990 Oldsmobile... | Answered on Jun 27, 2014

how about the fuel pump you inspect it already ?measure fuel pump pressure for standard value

1990 Oldsmobile... | Answered on Dec 05, 2013

jshuffman: Believe it or not your ignition module (located behind the coil packs) could be the problem. If your cooloing fans are not working either, this is the culprit. The worst part is that it won't always show a code on the old obd 1 systems. This module controls more than you think along with the computer on this type of car. Good luck. Hope this helps. P.S. Air conditioning will quit working too.

1990 Oldsmobile... | Answered on Nov 04, 2013

most leaks are at control back side

1990 Oldsmobile... | Answered on Aug 25, 2013

Some fuses will not have power, until that circuit is being used. What circuit is it?

1990 Oldsmobile... | Answered on May 29, 2012

No GM doesn't use a reset switch (really called a "Inertia fuel pump cutoff switch"). The fuel pump is cut off by an oil pressure sensor. If this car has the original pump you likely just need to drop the fuel tank and replace the fuel pump. Does it start if you spray starting fluid into the engine air intake?

1990 Oldsmobile... | Answered on May 27, 2012

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