At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.
Resources for the Repair and Maintenance of your 1991 Geo Prizm
1991 Geo Prizm
1991 Geo Prizm Problems
The engine mount on the passenger side of the car can wear out on cars with high mileage. This will put extra stress on the other mounts and the faulty mount will need to be replaced.
The EGR System tends to get restricted or blocked with carbon after 100,000- 125,000 miles which will cause an emissions test failure for NOX. If the EGR system is equipped with an EGR temperature sensor it will trigger a Check Engine Light for improper EGR flow. The repair is to clean out the EGR passages and the EGR Temperature sensor. Our technicians tell this repair is pretty straight forward and takes about 1-1.5 hours. It is al...
You may be able to prevent automatic transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned, the transmission system should be completely flushed.
Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.
1991 Geo Prizm Recalls (Recent)
1991 Geo Prizm Questions and Answers
air box intake hose is cracked in half.. need to locate one...1991 prism efi 1.6 l engine
can't find one ..one reader turned me on to Parts.com...they listed it, priced it ,an two days later said mfg discontinued it..
ANY OTHER SUGESTIONS?????
i gave someone a jump, when i park the car but when i tried to start the car the battery cables got hot and the car would not start, it trys to start but it will not i looked at fuses and checked ...
1991 Geo Prizm Reviews
super good i love it
A relative gave me a 1991 Geo Prizm in Sep 2009. It sat in a garage for 2 years without moving. Replaced battery, oil, spark plugs, distributor cap & wiring harness, and filled it up with premium gas to mix with the aged gas. Has run smoothly ever since. I quickly found out that this was one of the most reliable cars ever made. After reading this and other forums, I'm excited to get this little car to 250k+ miles.
At 50k I replaced the passenger side Transaxle and replaced tran fluid ($120). At 52k I flushed the coolant system ($20). At 55k miles I replaced all 4 tires ($275). At 60k I replaced the exhaust system ($300). At 65k I replaced the headliner (real easy to do yourself) ($40). At 68k I replaced the rear wheel cylinders ($220).
Took it in for a 70k mile checkup and I need: to replaced the the timing belt, water pump & valve cover, and all other belts (AC, Serpentine, Alternator, Power steering, h2o pump) ($450 for all). All 4 struts are leaking and need replaced ($400+). Also need radiator and thermostat ($220). Rear drum brakes will need to be done
Overall this has been a very affordable car. It seems that I've spent a lot on repairs, but it was all preventative maintenance, which is well worth it on a car that was free and has the potential to get 200k+ miles. Additionally, the parts are inexpensive and most repairs can be done by seasoned backyard mechanics (also cheap for mechanics to work on).
I would recommend this car to anyone who could care less about the status their vehicle brings them. I feel bad for my coworkers and their BMWs & Audis ($1200 to replace timing belt vs $450 on Prizm).
I only wish the motor had a little more oomph. I drive it into the Colorado Rockies and it certainly struggles up some of those mountain passes. It's fine if you can build up your momentum (or if its in the snow and everyone's slow) but if you're going around sharp turns the engine really slows and you'll be flooring it going about 40mph - which does not sound like the engine and transmission are having a fun time. I'm thinking after all the above repairs are taken care of, I'm going to put in a cold air intake, manual cooling fan switch and get rid of as much weight as possible (seats, excessive trim) to increase performance and efficiency. I'm also planning to remove all the interior trim and insulate it for a much quieter ride (did that between the roof and the headliner and you can really tell the difference). Be smart. Drive Geo.
THESE CARS WERE BUILT TO LAST ONLY IF YOU REALLY DO TAKE CARE OF THEM. THIS GEO HAS 175000 ON THE ENGINE. TIMING BELT CHANGED ONCE. OIL CHANGES EVERY 3500-4000 MILES ALONG WITH THE FILTER. 27 MPG. IF I COULD BUY A NEW GEO RIGHT OFF THE SHOW FLOOR, I'D BUY TWO. GOOD COMMUTING CAR AND VERY RELIABLE OF COURSE NOTHING LASTS FOREVER NOT EVEN HUMAMS. JR
1991 Geo Prizm. Have 239,000 miles and still going strong. Does not burn a drop of oil. Had the transmission replaced at around 100,000 when the after drive ran dry (most auto dealers do not check this for fluid, one even told me it didn't have an afterdrive!)Has had new timing belt and numerous starters etc. But this car is incredibly reliable. I keep putting new tires on it thinking it is the last pair. The only nagging problem it has: when it gets cold it won't crank, you have to hold the key on start for up to a minute to get it to crank.