My 1990 isuzu trooper, standard, intensifies its revs in idle suddenly. Sometimes it goes up and down, up and down... And I can see how the temp gauge rises quickly. My momentary solution in such cases is to stop the car and shut off the ignition and wait, sometimes this leaves me some minutes until it starts revving up and down again. No injuries so far, but I have not been using the truck much for this same reason. I would like to know what id the cause so that my mechanic can solve it.
The worst 1990 Isuzu Trooper problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine6
- Transmission4
- Body3
- Electrical3
- Brakes2
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine6
- Transmission4
- Body3
- Electrical3
- Brakes2
- Fuel system2
- Tires2
- Acceleration1
- Seat belts1
- Seats1
- Steering1
Recalls 2
Engine and engine cooling: cooling system: hoses/lines/piping/fittings
- What is wrong
- Improperly installed hose on the oil cooler could come in contact with the exhaust manifold and could melt.
- Risk
- Engine oil could leak out with potential for engineseizure and damage and could result in a fire.
- Remedy
- Properly install cooler hose clip to prevent contact with exhaust manifold.
Recall number 90V166000 · Recall details
Power train: automatic transmission
- What is wrong
- Putting in more transmission oil than specified can cause oil to bleed through air groove on to the exhaust manifold if oil temperature rises.
- Risk
- This could cause smoke emission from the manifold, whichcould ignite rubber hoses and result in a fire.
- Remedy
- Replace oil level gauge and notify owners to use only the specified amount of automatic transmission fluid.
Recall number 90V167000 · Recall details
See all 2 recalls for the 1990 Isuzu Trooper
Defect investigations
Engine compartment fires
Engine compartment fires
DP92015
Heater core failure
There is no summary currently available
EA92018
Defective heater cores
Defective heater cores
DP92005
Rear door hinge separation
There is no summary currently available
EA91033
Rear door hinge separation
There is no summary currently available
PE91046
Diesel engine surge
There is no summary currently available
PE90087
Technical service bulletins for the 1990 Isuzu Trooper 4
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This bulletin outlines the procedures for using the Alpine Exchange Program (the "Exchange Program"). The...
- Isuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural recommendations to...
- This technical service bulletin outlines the detailed procedures for the air conditioning system...
1990 Isuzu Trooper fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 2.6L 4‑cyl | 4WD | 14-15 | 17 | 15 |
| 2.8L 6‑cyl | 4WD | 14 | 17 | 15 |
What 1990 Isuzu Trooper owners say
Most recent owner complaints, unedited.
Rear passenger side tire tread started to separate, causing the consumer had to pull over. Sears, trail handler, size#p235/75/r15, dot#3dhllbe488.
My 1990 isuzu trooper is exhibiting dangerous revving and dropping of the idle. The truck accelerates without warning and is impossible now to drive safely. It is my understanding that the ecu in these trucks is faulty due to manufacturing defects. I further understand that thousands of others have these problems. Please initiate a recall of these vehicles and force isuzu to repair these dangerous defects at their expense, not the consumers'. Please take action on this extremely dangerous situation. I would appreciate your instructing isuzu to contact me with information on where I can have my truck towed to be repaired. It is not safe to drive it. Several garages said they cannot diagnose and fix the problem, and that isuzu must resolve the problem. Many thanks for your consideration.
The back left tire was defective (steel showing) causing the driver to loose control and run across the s/b lane of traffic and struck a guardrail, the vehicle the overturned going over the gouardrail down into a creek bed, the vehicle then flipped rear over front one complete time, all 4 occupants were injured (bridgeston/firestone p235/75r15, radial atx m/s, vdhl1m0254, left rear). Nlm
Consumer pulled into parking lot, and noticed smoke from front of vehicle. Stopped vehicle , turned off engine, and saw flames were coming from under fender on passenger side. Vehicle was totalled.
This vehicle started on fire; think it is in relation to transmission dip stick leak.
While driving on the road at 15mph went to apply brakes and heard loud grinding noises, pulled over to the side. Consumer contacted dealer and manufacturer. Isuzu rep told owner that the brakes are still safe. *ak
Engine failure.
Bottom of the rear door rusted out due to a design defect. Drain holes were not drilled. Consequently water was captured and door rusted out. Could present a safety concern.
During a rearend collision, driver's seatback broke, causing minor injury to driver.
Compare the 1990 Isuzu Trooper
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Questions about the 1990 Isuzu Trooper
Is the 1990 Isuzu Trooper reliable?
Owners have filed 23 complaints about the 1990 Isuzu Trooper, fewer than a typical Trooper model year.
What is the most common problem with the 1990 Isuzu Trooper?
Engine and cooling, with 6 complaints. Next is transmission (4).
How many recalls does the 1990 Isuzu Trooper have?
2 recalls, covering engine and engine cooling and power train.
Was there a recall on the 1990 Isuzu Trooper engine?
Yes, 1 recall: 90V166000. Check your VIN to see if your car still needs the free repair.
What year does the Isuzu Trooper have bad engine?
The Isuzu Trooper model years with the most engine complaints are 1999 (58 complaints), 2000 (25 complaints) and 1998 (19 complaints).
What gas mileage does the 1990 Isuzu Trooper get?
Official estimates for the 1990 Isuzu Trooper range from 15 mpg combined. The most efficient version (2.6L 4-cyl, 4WD) gets 14-15 city and 17 highway.
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