20 Most Recent 1991 Geo Storm Questions & Answers

ck the timing belt open up the oil cop see if the valves are moveing crank it over if it cranks over fast its a timing belt

1991 Geo Storm | Answered on Oct 06, 2018

For the age of this car it is a combination of both the fuel filter and pump, i owned one several years ago and found that the gas tanks are prone to rust inside, if you have replaced the pump and filter you may want to drop the tank again and check the screen on the pump if it is brown you have rust in the tank: another problem i had ( if you bought an oem pump ) they tend to slip out of position, you can tie the pump it place so it doesn't move......

1991 Geo Storm | Answered on Feb 14, 2017

Most engines don't fair well under extreme heat. It's apparent you might have some electrical issue's. Your rpm's or mph arm going up and down could be faulty speed sensor would cause arm problem. I think you may have more than one problem, the car shutting off is due to engine over-heating. Check cooling system-thermostat, water pump, radiator, engine fans and coolant temp sensor and fan relay's. It could be as simple as blown radiator hose.

1991 Geo Storm | Answered on Nov 20, 2015

Hi Keith:
Sounds like it could be time for a tune up.
Changing the spark plugs would probably be my first step.

1991 Geo Storm | Answered on Jul 18, 2015

well first is ,
is it engine misifre
or transmission shudder.

did you check fluid levels yet? AFT?
are spark plugs fresh, not 10 years old>?

1991 Geo Storm | Answered on Apr 22, 2015

lots and lots of reasons, guessing. over 50 (bad engine?)
but does it crank?, no car starts unless it's cranked or
like my car, push started or gravity started (a 6sp m/t)
if engine fails to start , and cranks robustly (fast starter motor)
1: never tuned up, running 10 year old spark parts.
2: blow fuse. check fuses.
3:; lost spark, check spark.
4: flooding or loss of fueling. to unflood any engine, crank at wideopen throttle (oper, guide tells you that)
5: timing belt not changed at 60,000 miles it will fail, and will not start
or start have like 1/4 power.
6: lost compression in or more cylinders.?

get it serviced? if all that is too much work? or confusing.

1991 Geo Storm | Answered on Feb 21, 2015

that is true.
but some cars running obd1 , can be scanned,. (i have one)
like all GM cars and even older, , some ford, , Honda's . Toyota;s
but this car is GEO, (underdog, but is really what. a Isusu.)
Isuzu's cars are mostly not raced or sold here now. so who's going to make scanner for such a rare car and engine and EFI?
there is no OBD1 standard, each company uses a unique design.
then,... so...
OBD2, in 1996 a USA invention is a standard and all tools work.
what you have is the old blink codes. wink wink...
all OBD1 cars work like this (or very close)
you connect a jumper wire, and the CEL lamp flashes codes.
so is the CEL stuck on? running.
must come on key on, bad lamp or bad ECU.

you can check out Isuzu Impulse

Example storm post..OBD1991 (USA)
To put the ECM (Engine Control Module/Ignition Control Module/Engine Computer) into diagnostic mode, where it will flash codes at you using the "MIL" (Malfunction Indicator Light or "Check Engine" light), short pins 1 and 3 of the ALDL/OBD1 connector using a paperclip. When you then turn the key into the on position, the MIL should flash once, then pause a bit, then flash twice. That means code "12." If there are other codes, they will be flashed out as well. All codes are two digits.
end quote, on storm

but where is the connector DLC?
and which pin is 1 an 3
so. we google more, or look it up in alldata.com like most do.

or here

that was the 1st google hit, using clear text human questions.
DLC jumper storm or Impulse.
or diagnostic jumper Impulse.

join a Geo storm or inpulse forum and ask for scan tools.
they will be custom tools. (or hacked, as i have done)

1991 Geo Storm | Answered on Sep 17, 2014

which engine is it.
open hood, see that EPA sticker it tells you which there.
short block
long block
or long + manifolds and all sensor.
what engine.?????????


1991 Geo Storm | Answered on Aug 29, 2014

vacuum line is not connected properly or line may be damaged cut or burned. minor issue should be able to hear loud air suction noise

1991 Geo Storm | Answered on Aug 10, 2014

valve cover spark plug grommets need to be replaced. purchase valve cover gasket set should be under 30 bucks depending what engine u have sohc or dohc. If this does correct oil issue to your spark plugs, then u have a much greater problem. bad rings and should rebuild motor

1991 Geo Storm | Answered on Aug 10, 2014

That would be your throw out bearing and will need to replaced along with clutch and pressure plate

1991 Geo Storm | Answered on Aug 10, 2014

I don't believe that power steering pressure switch is an actual part for 1991 Geo Storm.

1991 Geo Storm | Answered on Aug 10, 2014

Heating and A/C Module may need to be replaced.

1991 Geo Storm | Answered on Aug 10, 2014

triple posted, see post 1.

1991 Geo Storm | Answered on Jul 27, 2014

the door ajar switch is closed, or bad.
or wires to shorting. etc.

1991 Geo Storm | Answered on Jul 26, 2014

use a ruler, we cant guess what is under hood of any lumina.

1991 Geo Storm | Answered on Jul 20, 2014

what are you removing.
are stated the end goal. (new pads, new rotor, new caliper, new wheel bearings , what?
then can answer.
here is the manual to read, its all there.

1991 Geo Storm | Answered on Mar 15, 2014

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