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Oldsmobile 98
Repair Questions and Answers
Question: 1985 Oldsmobile 98 3.8
mileage: 113,000. My car was bought at an auction. It did
not start, so I replaced the fuel pump, and that fixed
it. I drove for about 50 miles, no problems, and then
all of a sudden the tranny went into neutral out at third gear.
If you put the car back in 2nd, it will engage just
fine, and shift between 1st and 2nd just fine. At idle,
it engages just fine in reverse and drive, but as soon
as it gets to 3rd, it just goes neutral. Any
suggestions?
Answer: It appears from what you
have told us that you are probably ready for a
transmission overhaul.
Question: 1986 Oldsmobile 98 regency
3.8 litre mileage: 133,00 KM. When I start the car when
it is cold it starts ok and idles for 7 seconds than
stalls. The third time I start it it stays running and
idles ok. When I drive the car, it runs and idles ok. If
I shut the car off when it is hot and start it back up
in five minutes it idles very rough and sometimes the
check engine light will come on. The computer code is 44
- lean exhaust when it is idling rough I take out for a
spin and it runs ok. I had the fuel pump changed and
same problem. I changed the MAF sensor and same problem.
I changed spark plugs and fuel filter 6 months ago. Any
suggestions.
Answer: Try cleaning the idle speed
motor and idle passages, then check for proper operation
of the speed motor.
Question:
1991 Olds 98 3.8 mileage: 111,941. My car will not
start after the engine cools down. The mechanic
has replaced the crankshaft, camshaft sensors, IGN
module and computer. He has checked for electrical
problems. Computer shows everything is fine.
He has been playing with it for about 3 weeks.
Originally, it burned up the two sensors and the module
and he does not know why it did that. He is really
stumped. Any ideas? Even tried a new coil
pack. Two mechanics now stumped. They have
asked several gm mechanics in area as well.
Answer:
You need check and see if you have fuel pressure when
the car will not start. If you don't have any pressure
you will need to replace the fuel pump and filter.
Also check to see if you have spark when the car
will not start. Then check to see if you have
electrical pulse to the injectors when the car will not
start. If the windings in the fuel injector have
shorted, the electrical draw from the computer by that
injector will burn out the computer. Each injector
should be checked with an Ohmmeter for proper
resistance. Also, with an Ohmmeter, check the
ground connections to the computer. Finally,
check the alternator for a failing diode. If a
diode is weak, AC volts can leak out and cause havoc
with a computer. A computer is designed to work on
DC volts.
Question:
1967 Oldsmobile 98 425 mileage: 89,000. Hey, guys
I have just purchased this beautiful car for a very good
price due to left rear axle being out about 1/4 of an
inch. Unfortunately, I do not have much experience
with rear-ends at all let alone the fact that this one
has the limited slip rear-end. I have pulled the
rear end apart and of course found that the wheel
bearings on this side are shot. Any
suggestions on how to press the new bearings would be
greatly appreciated. I am trying to repair the car
where it sits so I have taken out the shaft to press the
bearings at the garage I work at. What I am
wondering is if there is any secrets or tips that I
should know about to press the bearings in the rear-end.
Answer:
No secrets. Just use the proper fixtures to hold
the bearings and axle. Be sure to put the retainer
back on the axle before you press on the new bearing.
Question:
1985 Oldsmobile 98 regency V6 mileage: 144,600. It
has fuel injection I have replaced the EGR valve and air
filter and the check engine light came on before it was
shutting off as I was driving and it would shut off at a
idle.
Answer:
Your car may be ready for a major tune-up including
spark plugs, plug wires, distributor cap, rotor, fuel
filter and air filter. Also, perform a fuel pump
pressure test. Clean fuel injection system
including throttle bore, idle speed control motor and
passages. If problem still exists, scan computer
for trouble codes.
Question:
1991 Oldsmobile 98 touring 3.8 mileage: 135,000.
Check oil level warning keeps flashing in information
center. What controls this?
Answer:
Oil level sensor and it probably needs replacing.
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/ 98
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