Last post on Jul 09, 2013 at 7:15 AM
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Isuzu Trooper, SUV
#11381 of 11966 Re: Auto trans acts weird when cruise is on...ideas?? [shawgb]
Oct 12, 2006 (9:37 am)
Hi, I have not run across any post describing the conditions you do for your trooper, but I thought you might be interested in what the manual says about the cruise control. I don't see any thing in the description that might lead to the behavior you describe, unless it is the powertrain control module or the cruise module that has a glitch that might cause this. I really do not see where the action you describe would create any real problem for most driving conditions, and since the trans locks back up when the temporary acceleration is done, then mileage would not seem to be an issue. Here is what the manual says:
1998 Isuzu Truck Trooper LTD V6-3.5L
Vehicle Level Cruise Control Description and Operation
Description and Operation
The cruise control system uses mechanical, electrical and vacuum-operated devices to maintain vehicle speed at a setting selected by the driver.
The cruise control unit receives command signals from the cruise control switch. It receives information about operating conditions from the brake switch, the speedometer, the clutch switch (manual transmission) and the automatic transmission mode switch and Powertrain control module (PCM) (automatic transmission).
The cruise control unit sends operational signals to the devices that regulate the throttle position. The throttle position maintains the selected vehicle speed. The control unit compares the actual speed of the vehicle to the selected speed. The control unit then uses the result of that comparison to open or close the throttle.
The brake light switch releases the system's control of the throttle at the instant the driver depresses the brake pedal. The switch sends a signal to the cruise control unit when the brake pedal is depressed; the cruise control unit responds by allowing the throttle to close. The clutch interrupt switch or the automatic transmission mode switch sends a disengage signal input to the cruise control unit that also allows the throttle to close.
The cruise control system will set and automatically maintain any speed above 25 m.p.h. (40 Kph) . To set, press the cruise control main switch so that the "CRUISE MAIN" indicator is ON . After reaching the desired speed, press the set switch. The cruise control unit will receive a set signal input and will activate the cruise control actuator.
Pushing the cruise control switch cancels the cruise control system. This removes power to the cruise control unit and erases the set speed from memory. The cruise control system also disengages when cruising speed is lower than the preset speed by 12 m.p.h. (19 Kph) or more. If the system is disengaged temporarily by the brake switch, clutch switch or the automatic transmission mode switch and vehicle speed is still above 25 m.p.h. (40 Kph) , turn and release the Resume/accel switch turned and released, the set memory is retained, the vehicle automatically returns to the previous set speed.
For gradual acceleration without depressing the accelerator pedal, turn the resume/accel switch and hold it there until the desired speed is reached. This will send an acceleration signal input to the cruise control unit. When the switch is released, the system will be reprogrammed for the new speed. Quickly turning and releasing the resume/accel switch allows you to tap up the preset cruising speed. Each turn increases the preset speed by 1 m.p.h. (1.6 Kph) . The Preset speed can be increased by up to 10 m.p.h. (16 Kph) in this manner.
To slow the vehicle down, depress and hold the set/coast switch. This will send a deceleration signal input to the cruise control unit, causing the vehicle to coast until the desired speed is reached. When the desired speed is reached, release the set/coast switch. This will reprogram the system for the new speed. Quickly depressing and releasing the set/coast switch allows you to tap down the preset cruising speed. Each depress decreases the preset speed by 1 m.p.h. (1.6 Kph) . The preset speed can be decreased to a minimum of 25 m.p.h. (40 Kph) in this manner.
#11382 of 11966 Re: Isuzu 1999 trooper OIL CONSUMPTION [cki_primer]
Oct 12, 2006 (2:55 pm)
I'd have to second this. I've owned my Trooper since I purchased it new in 1999 and it uses a quart of oil every 800 miles. I've always used Mobil 1 synthetic. I'm selling it soon because I'm tired of adding oil to it and the mileage sux. It's at 85,000 miles and needs a timing belt.
#11383 of 11966 We need your help!
Oct 15, 2006 (10:31 pm)
Hi, everyone. As you've probably noticed, we have been trying to refine the discussions into more narrowly focussed topics. Our objective is twofold. We want to make it easier for people seeking specific information about their vehicles to find it easily and without having to wade through hundreds or thousands of postings.
To those ends, we will be shutting down the general make/model discussions and work exclusively with specific issues. This requires us to populate the make/model subsections with relevant, interesting and timely topics. Rather than having the hosts simply create boilerplate topics for each make/model, we feel that you, the owner, the make/model enthusiast and the prospective buyer can best judge what those topics should be.
You can help by adding a discussion (it's easy!) or suggesting one here.
To add a discussion, click on the last link in the "You are here" line at the top of this page. That will take you to the topic page for this make/model. Review the list of topics and click on the "Add discussion" link when you've decided what topic you'd like to add. Follow the directions and you're done! Feel free to add more than one. Just avoid duplicating existing topics and try not to make it TOO specific!
Your help and continued participation in the Forums is greatly appreciated! Thanks.
Oct 24, 2006 (9:53 pm)
Please go to the group top level and create a discussion that fits your comments/questions or post in an existing discussion.
Nov 12, 2006 (3:29 pm)
Nov 26, 2006 (8:42 am)
In 1990 I purchased a brand new Trooper with the V6 and automatic. I took it out 4-wheeling all the time (logging tralis, mud holes). I LOVED that truck for it was truly a "Mountain Goat!" There was just no getting it stuck (I tried). Unfortunately I owned it for just a few years before trading it for a 2wd minivan (moment of extreme stupidity)..
The joke is a few days after trading the Trooper, we received the largest snow storm in the history of the state When I was finally able to navigate out of my sub division (a week later), there, across the street from the entrance of my subdivision, on the front line of the dealer's lot, sat my recently traded Trooper.
I think it was laughing at me.
It took until 2006 for me to finally purchase another 4X4. I bought a new Land Rover LR3 mostly because it reminded me of my old Trooper I never should have traded. The basic configuration, driving position, and off road behavior of these two serious off roaders are so very close.
I still miss the Trooper (although the "butt warmers" in the LR3 sure are nice on a cold winter morning...
#11387 of 11966 Re: Advice on 1998 Trooper purchase.... [cwm]
Nov 26, 2006 (2:07 pm)
My wife's 98 Limited has 170K miles on it and is just now starting to nickle and dime (CV and engine computer). I would caution against getting an SUV for a minor, but my wife's friend has smashed her Trooper a couple of times in traffic pulling a horse trailer and came out OK. You might consider an advanced driving school to familiarize him on risk management and skills to bring an SUV down to speed with. Some of the most preventable SUV accidents involve speed and unbuckled rear passengers becoming projectiles.
He won't get great mileage (18 mpg average), and the 6 CD player will eventually eat 6 CDs. The heated seats are very nice.
#11388 of 11966 98 Trooper Computer
Nov 26, 2006 (2:14 pm)
My wife has a 98 Trooper. The vehicle's engine surges or dies at stoplights. Isuzu says that the computer has to be replaced ($2K) and that we won't know if the new computer will work until it is installed($2K gamble). This seems to be extremely outrageous method of determining if something will work. The vehicle has 170K miles on it, but is otherwise in decent shape.
Any ideas or experiences on this type of problem?
#11389 of 11966 Re: 98 Trooper Computer [trooper98]
Nov 27, 2006 (7:16 am)
hi, I Don't know about whether or not the ECU is really the problem. There are specific codes that inform whether it is bad or not, but unless you know what codes, if any, were found then there is no way to get their description.
As far as the ECU, rebuilt ECU's are available, and some rebuilders can be found on ebay. They will also rebuild your original ECU if that is what you would prefer. I sent what I thought was a bad ECU to one of them, not for an Isuzu, and they called me and told me that the ECU was not bad and would only rebuild it if I directed them to do so. I thought that was pretty professional of them. I think the price was around $200 dollars. You might want to check around on that. Good luck
#11390 of 11966 Please help! Need torque specs for brake job
Nov 27, 2006 (11:20 am)
I'm doing a front brake job on my '99 Trooper and I need to get the rotors turned, so I need to remove the hub and rotor. The problem is, that I can't find a repair manual for it, so I don't have any of the torque specs for re-assembly. If you know the specs or a source for a repair manual I would really appreciate it. I haven't finished the disassembly yet, but I think these are the only specs I'll need.
I'm looking for the torque specs for the following:
- hex bolts that connect the axle and hub
- spindle nut
- three screws that hold the spindle nut retainer
- bolts for the brake caliper mounting bracket
- bolts for the brake caliper
Thanks in advance.