Last post on Nov 17, 2013 at 1:29 PM
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Isuzu Trooper, Isuzu Trooper II, Transmission, SUV
#152 of 167 Isuzu Trooper Engine Heavy/Revving and Drastic Fuel Economy Drop
Apr 01, 2013 (7:21 pm)
Hi, I have an isuzu trooper, 2000, 6cyl, 4wheel drive, 73k miles. Had been experiencing stalling and some loss of power. Egr valve, air intake manifold gasket, fuel pump changed. Had oil change and fuel injectors cleaned, idle cleaned, had spark plugs, timing belt, oxygen sensor , brakes checked, check for vacuum/fluid leaks, mechanic said they were ok.
No more stalling, but car does not feel right, starts very heavy and rides like that a while, especially when foot on gas, gas economy has suddenly dropped from 15 to 9 mpg. Engine also feels like revving sometimes.
Any thoughts would be grealy appreciated, love this suv, thank you
#153 of 167 Re: Isuzu Trooper Engine Heavy/Revving and Drastic Fuel Economy Drop [gabrielledk]
Apr 02, 2013 (4:49 am)
You must get a diagnostic code reading before going any further. YOu might find an 02 sensor issue, there are 4. Also, the H20 temp sensor is a very important component with these types of issues. Replacing is simple and inexpensive..$20.
How does one "check" the timing belt? I just replaced mine at 99,720 on my 2002 Trooper and it looked fine (although a little dried out).
Finally, you must consider that these if you are not the original owner it has probably been 4-wheeled in deep water, which mean accelerated dry rotting of the vacuum lines/connectors. The fuel consumption issues on this model is usually associated with the fuel system. Also, check the transfer case, axle, differential and LSD fluid levels. You will be amazed at the capacity levels these units hold.
#154 of 167 Re: Isuzu Trooper Engine Heavy/Revving and Drastic Fuel Economy Drop [speedrover2]
Apr 02, 2013 (8:15 pm)
Thanks for your reply. I am not original owner, but bought it when it was less than yr., so have had since 2001. No check engine lights have come up through this whole ordeal. We had a diagnostic run , only Egr came back as an issue.
They put in a new one, but still stalled, that's when intake manifold gasket was replaced and put in new fuel pump . Stalling stopped.
Issue is really that heavy/revving of engine and sudden fuel consumption drop.
I will have O2 and H20 sensors rechecked.
Would bad timing belt cause any of this.
Since they changed pump, filter, cleaned fuel injectors, ran tests for vacuum/hose leaks, what else should I have check on fuel system.
Also, brought it to a different mechanic today and while he couldn't pinpoint cause of issues I mentioned earlier, he thinks there is an engine issue, when he put car in neutral and stepped on gas, there was a slight ticking noise. Does this sound true.
Thanks a million.
#156 of 167 isuzu trooper possible transmission problems
Apr 07, 2013 (4:38 pm)
I have a 1989 Isuzu Trooper that runs great but it sometimes has a problem with what I think may be the overdrive on the automatic transmission not turning off because it will go 60 on the highway at around 3500 rpm and I'll have to hold it that way for a while before it will drop into 3rd gear and run at about 2000 rpm finally. I also notice that when I drive it in neighborhood areas it won't go into neutral and slows down unless I constantly hold the gas. They recently did transmission work on it before I got it but I don't know what they did... what could it be?
#157 of 167 isuzu trooper transmission squeal
Apr 24, 2013 (7:48 am)
I have a 2001 trooper that has a high pitched squeal when in gear. It is fine in neutral and I believe in reverse. Any suggestions?
#158 of 167 Re: isuzu trooper transmission squeal [twomel]
Apr 24, 2013 (10:11 am)
Transmission issues are serious and the most difficult to decipher. You must provide more information. Should we assume yours is an automatic transmission? In any event, the fluid level is the first check. You must go underneath the car to the transmission itself to check. There is no 'through the chassis/body' dipstick like the oil. When removing the the transmission filler cap, the fluid is to be level with the filler hole (provided you are on a level surface). If not top it up.
If you discover there is continuous noise after this procedure, you should have it towed to a transmission mechanic. If your Trooper is a 4wd Limited version like mine you should consider checking all the drive fluids: Front axels, slip differential, etc. even the propeller shaft has grease fittings (don't let any shop tell you otherwise)
#159 of 167 Re: isuzu trooper transmission squeal [speedrover2]
Apr 24, 2013 (4:38 pm)
Sorry for the lack of detail. It is a 2wd automatic. We had the transmission flushed and it has been looked at by a few mechanics with no idea what the problem might be. It has squealed like this for at least a year or more. It seems to drive fine, but is very noticable at low gears - possibly because I am stopped or the engine masks the noise. It is a very high pitched sound.
#160 of 167 Re: 1997 Isuzu trooper transmission /Linkage? [n2rnr]
Jul 23, 2013 (8:26 am)
I just purchased a 98 Trooper and have the same problem. The engine was completely rebuild. Transmission fluid fleshed. I was driving it yesterday and the truck went into false neutral and rev'ed. When I step on the gas it rev'ed higher and did not engage until I slow down or I put it in 3rd. Anyone has any idea how I can resolve this problem? Many thanks for all the help
#161 of 167 Re: 1997 Isuzu trooper transmission /Linkage? [tc1522]
Jul 23, 2013 (9:17 am)
I would check the transmission fluid level first. You have to do this while the engine is running. There are some websites that explain how to do it. If you can't find it, I can send you directions. Since there is no dipstick for the transmission, you have to do it under the car as well. It may also need a new transmission filter too.
Sometimes my trooper revs up too, but I think it is just because the throttle sticks sometimes.
It does sound like a transmission problem. If it does need extra transmission fluid, you could put in the Lucas Transmission Fluid that fixes leaks and other transmission problems. It is really thick, so you may need to warm it up. You also have to pump it in like you would for the differentials.