Top 20 1994 Oldsmobile Ninety Eight Regency Questions & Answers

It could be several different problems. If you want to guess then start with the drivers master switch.

Don't waste you time. You have to go back to 95 or 96 to be able to swap parts.

With the engine running do you have vacuum to the vacuum control switch in the heater control?

i would suggest lookin in side the vents depending on the climate you live in a field mouse or some lil critter may have got in there to build a nest....i say this because i have seen it a many times in my career...good luck!!!

May be the Idle air Control Valve (IAC) . Suggest you do the search for both the TPS and IAC. There's a wealth of info on how to test, clean replace the sensors on the 3.8 engine.

Have you changed the fuel filter. If you have check the fuel pressure with a manual gauge .

Try flushing the cooling system. The heater core us probably clogged. A flush may clean it out. Good luck.

Sensor for what ? The engine coolant temp sensor ?

I have a 1990 Olds 3.8 V6. Installed a 715k6 belt bypassing the frozen AC compressor using the stock belt routing. Working great. Thanks for the above advice

coils are getting hot replace them

This could be electrical, when you get engine not to start check your fuel pressure and also see if you have spark, this will help in finding the problem.these trucks are none for electrical connector problems to fuel pump, by checking to see what the engine is missing ,like spark or fuel will help, check the ground to the frame on the rear of the truck .if you locate the wiring harness going to pump you will see groud wiring leading off harness to frame rail, make sure that is good also you can try to move wiring while someone is trying to start engine to see if it is a wiring problem,If it turns out to be wiring to pump there is a replacement connector sold to rewire fuel pump connector, start with these tests and will go from there. good day.

i would say to start with your crankshaft sensor

Timing belt.

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start the engine and connect a tester to measure voltage between the terminals of the battery you should read more than 13.5 volts. If it's under that (ex. 12v) then the alternator doesn't work no matter if it's new if it's under 13.5 volts it's ruined. Assuming that the alternator regulator it's incorporated in the alternator cause if it has an external regulator, that's where the problem is.

Its probably a short some place in the wiring on your turn signal switch ie the ground is shorting out your positive making it pulling to much to blow a fuse.----- If the fuse directly blows as soon as you turn the ignition then , ignition switch wiring's also need to be inspected.-------- But if the fuse is blowing when you operate the turn signal lights, then turn signal switch and its wiring needs to be inspected, there is definite short.--------- Getting this checked will help.Thanks.Helpmech.

check your fuel pressure regulator its location should be on the fuel rail.Pull vacuum hose off regulator if fuel drains out of it then the diaphram is bad. Hope this helps!!

This is a very common problem on GM vehicles. The car's key, ignition, and TDM (theft deterrent module) are not communicating properly. This can be a very expensive fix, but is rather easy and inexpensive to bypass. Look at this link for info on how to fix this. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Attached to fuel sending unit in gas tank.

Fuel pressure should be between 41 and 47 psi.