20 Most Recent 1991 Isuzu Trooper Questions & Answers

Question edited for clarity (order), spelling and add maker. Question moved to model category. Videos and parts supply https://www.google.com/search?q=1991+Isuzu+Trooper+2.6.+Thermostat+location ..

check the fuel pressure and flow , if the pressure is low replace the pump if flow is low replace the filter.

Replace tempature sensor

Sounds like you have a bad flasher relay.

You have a water leak from the sound of it or water is draining from over heating. Things to check for, leaks at the hose connections, leaks at heater connections on engine, leaks at water pump and any leaks at head gasket. Assuming there are no leaks check or replace or adjust your water pump belt. Take the thermostat out and run the engine without out it. If the problem is solved replace the thermostat recommended for you car. You can also have it checked as well.

Replace the injector.

great question, (old) oil and water do that. or not changing oil until 25,000 miles like some dweeb, synthetic oil users suck in to the lie. or driving only 1 mile per day (short trips) the engine needs to reach full operating temp to burn off all that water. gasoline burns into CO2 and water. so water happens here. or its a FORD (LOL)

depends on options. it in the oper guide. what country? which engine, size , gas or diesel? in usa , its 22gal. but that is all wild guess, country ,etc.

I replaced all of my joints, ball, tie rods, etc with grease fittings. If you can't see or feel them, there are none. You can try a grease needle that are sold at auto parts stores for cheap. You have to pierce the joints and inject them slowly. Eventually you'll have to replace them with joints that have fittings.

check that the tap that turns on the heater is working . check that the vacuum line is connected and the heater switch is ok.

none only use transmission fuilded

Have you checked the cable at the speedo to see if it is actually turning when the vehicle is moving ?

you have a bad fuel pressure regulator it is located on the fuel rail

you could have sucked water into the engine and welded the pistons to the positions that they were in best way to check would b to take the engine ape

To the best of my knowledge 1991 troopers don't have a carb. They are fuel injected

Hi Patrick, Definitely check the timing and also the fuel pump pressure. Make sure to replace the air filter. Check all the vacuum hoses for leakage and good fit. Make sure no pipes are damaged or broken. Make sure the ducting between the airflow sensor and the throttle body is intact and not cracked or broken. I believe the problem is in the ducting and the vehicle is sucking in air. Regards John