Last post on Dec 20, 2012 at 10:42 AM
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Isuzu Trooper, Isuzu Trooper II, SUV
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#155 of 383 91 Trooper 4th gear only
Dec 14, 2007 (11:46 am)
My buddy bought a 1991 trooper v6 (against his better judgement), the trans. made some terrible grinding noises, 3 days later nothing worked but 4th gear. After it sat in my barn for 3 months I bought it cheaply. I'm going to pull the trans. this winter.
Is this a common problem with the Isuzu transmission - losing all gears, grinding (will not engage) with clutch in or out? Synchros?
Thanks, any information is appreciated.
#156 of 383 Temporary loss of power..Trooper II 1984
Dec 14, 2007 (12:41 pm)
I've got this older 1984 Trooper II with 1.9L engine. Sometimes it experiences a loss of power, gradually slowing down. If I stop the vehicle for a few minutes, ignition off, then the power is restored. Engine power (horsepower), not electrical power, I have no problem with electrical power. It is puzzling. I have replaced an inline fuel filter and cleaned the fuel screen on the carb. Any ideas?
#157 of 383 Love mt trooper
Dec 14, 2007 (3:50 pm)
I just wanted to wish everyone a happy holiday. This is the time to be thankful. I am thankful to all of the advice that has allowed me to proudly say me 1994 Isuzu Trooper has 227,000 and counting. I wish all of you the same.
#158 of 383 Re: Temporary loss of power..Trooper II 1984 [phototone]
Dec 15, 2007 (1:24 am)
How repeatable is the problem? The length of time it takes to have the problem, if it is fairly consistent can help determine the problem, a part getting hot for example.
My 1984 Trooper 1.9L had an engine computer in the glove box. It was possible to connect a couple pins together on the computer to cause it to blink codes on the dash idiot lights. If you can get the shop manual, there is instructions and a table of code, their meaning, and what to check to correct the problem. Do you have any dash idiot light coming on?
How long do you have to wait with the engine off to restore power? The time that takes might help, to determine what part is recovering, the recovery time is important.
Does the engine act like it is running out of spark or fuel or air?
Things that mess with timing can cause loss of power, the computer adjusts your timing based on sensors on the engine.
Something else I changed was the throttle body, a plate with the butterfly valve at the bottom of the carburetor. I noticed a significant vacuum leak around the throttle shaft because of rough idling. A vacuum leak can cause loss of power.
I drove my 1984 Trooper 201K miles. It always was reliable. I had the optional power steering, the tensioner pully for that was defective, Isuzu designed a better pully and that fixed it. The 1.9L engine is "the little engine that could". IT is very easy to work on. A friend of mine rebuilt his LUV truck's 1.9L engine and it turned out like new, the look of satisfaction n his face when it started up and purred beautifully was priceless.
#159 of 383 Re: Temporary loss of power..Trooper II 1984 [boxtrooper]
Dec 15, 2007 (5:37 pm)
Today the problem was very bad. Went on a 300 mile trip, and I had to stop every 20 minutes or so, as the engine would lose enough power to not go above 25 mph downhill. Waiting with the engine off for about 10 minutes restores power for another 20 minutes or so. The engine does not overheat, the temperature guage stays very steady, and this is verified by personal touch on the engine. It has plenty of antifreeze and oil. My Trooper is carburetter, and the idle is very smooth. I think I will replace the fuel pump, since I have a new one already here. But I am sceptical that this is the problem. You talk about a computer and dashboard lights giving a readout. I don't have any type of digital display for a readout to show up on. The only "computerized" function that I can see is that the distributor is pointless, having a sensor under the rotor, rather than points.
#160 of 383 Re: Temporary loss of power..Trooper II 1984 [phototone]
Dec 16, 2007 (2:28 am)
phototone, The dash light for the computer codes is just blinking of a regular dash light bulb, the one that says check engine, if I remember correctly.
For example: 3 short blinks followed by a pause then 1 short blink followed by a longer pause would translate into code 31.
#161 of 383 '94 Trooper Front Hub Lock or not?
Dec 16, 2007 (7:36 pm)
Got my used 94 in July and went 4wheeling a few times (nothing harsh just some bumpy Utah desert and mountain trails and the 4WD seem to work fine but when it came time to use the 4WD in its first snowy ride (with me) I had no problem spinning the rear wheels and the fronts didn't seem to be locked or pulled their load. I couldn't tell if the hubs locked like they did in the warm weather with the distintive "clik". I can't hear any audible lockup or "clik" and I go back and forth in 4hi and 4lo and back into 2hi and back again a few times. I still am able to spin the rears in the snow a bit but the fronts don't seem to be grabbing all that well.
Is this normal for the the troop? I am used to 4X chevy suburban front axle chatter etc. Also at one point I heard a rattling sound coming from the front a couple of times and once reminded me of a noisy shock absorber rattle / thump but hasn't sounded of since I first heard it a month ago in November.
#162 of 383 Trooper 1989 problem
Dec 16, 2007 (11:22 pm)
i have an isuzu trooper 1989 4 cylinder. I was driving it today in highway. suddenly the red engine light came on and i in a few second, the car turnned off. i was forced to pull out the road. i checked the engine. the oil and cords and anti freeze looked fine. i tried to restart. it did not turn on. i felt the fuel is not comming. (but i might be wrong)
is there anyone that can tell me what could be the problem? thank you.
#163 of 383 Re: '94 Trooper Front Hub Lock or not? [utahdust]
Dec 18, 2007 (6:02 am)
If you are sure that the transfer case is engaging and the front prop is spinning but you still are not getting 4WD, then:
You need to check the auto hubs to make sure the circlip on the shaft is still in place. Since it is an open differential, neither side will feel engaged if only one side is working right. Damage can be done to the outer splines if allowed to continue. If the splines are OK, and clips are there, then the hub itself needs to be checked and cleaned and greased properly. If the splines are damaged, cheapest repair is to put manual hubs on, as they don't use the outer spline. Otherwise, you would have to replace the stub axle.
#164 of 383 Re: Trooper 1989 problem [simorgh]
Dec 18, 2007 (6:05 am)
Start with basics......is there fuel to engine? If not, then fuel pump may be shot. check the fuel filter....when was it last changed, and if you have to do pump, change it too. Check battery posts, etc for corrosion. Good starts.