Last post on Oct 07, 2010 at 5:39 AM
You are in the Isuzu Trooper
What is this discussion about?
Land Rover Defender, Isuzu Trooper, Engine, SUV
#31 of 73 Re: it will not run [ar_mon_do]
Jan 28, 2008 (10:14 am)
Hi and welcome to the forum.
I don't believe that the engine you have is a GM unless someone put it in, as the stock engine in the trooper in 1996 was an Isuzu 3.2 or 3.5...I am not sure when the breakpoint for the difference was. Regardless, it is always best to go back to basics first......your CEL is telling you there is a code set so it should be read. I think you have an OBDll compliant ECM, so getting it read should lead you to the prime suspects. I would definitely change the fuel filter and check the fuel pressure and pump function first, given your symptoms. There is also a filter sock on the pump that could clog, so getting a fuel pressure reading is also important. If you are used to working on cars, you can jumper the fuel pump relay to keep it on so you can verify it is working properly.
Catalytic converters are expensive, and O2 sensors are also important for both emissions and the driveability of the trooper. Your CEL should help there too.
Hope this helps. If you have a different motor, then of course this info may not necessarily apply, but generally should be similar.
Good luck. On guys opinion.
#32 of 73 Trooper stalls or rough idle
Feb 11, 2008 (5:31 pm)
Will idle rough or stall when in drive and brake released. P0 codes first for the EGR valve. I cleaned it. It was sticking. Next P0 codes too lean banks 1 and 2. Cleaned Mass air flow sensor. Too lean codes and too rich. Replaced fuel filter. Same codes and same symptoms. Replaced Mass Air FLow Sensor with aftermarket. Same symptoms. Check engine light has not come back on yet. But literally just did the MAFS replacement. I did not disconnect the battery for a period of time. My son will do that tonight. Any thoughts? 01 trooper 3.5l
#33 of 73 Re: Trooper stalls or rough idle [dcoll]
Feb 12, 2008 (7:27 am)
You definitely need(ed) to clear the codes to get a reliable idea if the changes you made had any effect. The codes are stored and only cleared by the computer when certain things happen, like starting the car 5 or 10 times without the problem reoccurring. Even then, the light may go off, but the code itself is stored. Clearing the codes by disconnecting the battery for an extended period of time or pulling the ecm fuse (both alternatives to clearing with a scanner) is really the only way to be sure you are not just seeing the old saved codes. HTH. One guys opinion.
#34 of 73 1998 trooper engine, 152k miles, head gasket
Feb 12, 2008 (5:03 pm)
head gasket leaked (engine oil/gas in coolant). this was its "second" engine . this engine always checked "full" for oil. i checked it every ~2.5k miles & had it changed every 5kmiles. this engine only had 87k on the block . estimated repair for head gasket was $1800 without machine shop work, $3000 with machine shop work, if needed. also need new cv boots, $600 (front end). sold for $1800.
at 65k miles, 5k past 60k powertrain warranty, original engine threw a rod. dealer gave me new short block ($3500 value) and paid for 1/2 labor, with me paying $700 for labor . this engine would go through a quart of oil every 3k miles - i would add a quart between every oil change, which i had done every 5k miles.
bought a 2004 4X4 Navigator Ultimate with 39k miles (it came with a premium lincoln extended warranty, 72mo/75k miles) for $23k ($25k out the door). so far, there's been about ~$7-8k in repairs under the warranty
#35 of 73 Re: Trooper stalls or rough idle [dcoll]
Feb 13, 2008 (6:41 am)
Checked the intake manifold gasket and it is leakeing. On passenger side. You can hear the hissing and when sprayed with carb cleaner, the engine revs. Thank you all for all of you info. This site saved me a lot of time and money
Feb 17, 2008 (1:58 pm)
What kinf of fluid does a manual transmission use in a 1987 trooper gas engine? plz let me know
#37 of 73 fuel injectors
Feb 23, 2008 (5:58 am)
I have been having a ongoing problem with the cel blinking for a variety of reasons, i have fixed all but a misfire in # 4 cyclinder. after replacing the coil pack and the spark plug to no avail, i have decided to move the fuel injectors around to see if i can isolate the problem. Currently i have the fuel rail released but not completely out and i am trying to swap out a couple of injectors. Does any know how they detatch from the fuel rail? I've removed the clip, but i still can't get the injector to seperate. Any help at this time would be helpful.
#39 of 73 1999 Trooper 3.5L engine CLACKING noise!
Mar 10, 2008 (4:27 pm)
I have owned a 1999 trooper 3.5L for 2 years and it currently has 137k on it. My son took it out for a spin and brought it back with a VERY loud clacking noise coming from the engine. Any ideas? It has to be serious, my real question is - is this motor worth rebuilding? Are there any GM engines I might throw in this thing instead?
#40 of 73 Re: 2001 Trooper Engine Failure [maryhannah]
Mar 29, 2008 (6:16 pm)
Question: What did you do about your trooper. We have a 99 trooper and we have been adding oil every week. No leaks.
I am trying to figure out what it is and how to fix it.