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Isuzu Trooper Engine and Performance Problems

65 messages,  Last post on Oct 11, 2009 at 5:12 AM

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What is this discussion about? Land Rover Defender, Isuzu Trooper, Engine, SUV

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#27 of 65 Re: help!! [maryhannah] by scorpious Nov 25, 2007 (7:53 pm)
Replying to: maryhannah (Nov 24, 2007 2:23 pm) If its 4 wheel drive put the transfer case into neutral! Then you can push it any where! Be sure to put the transfer case back into gear or it may roll away on you!!
#29 of 65 Isuzu Trooper Lack of power by apeto Jan 23, 2008 (4:32 pm)
Hi, I have an Isuzu Trooper 1992, 3.2l DHOC, and its not running well, its like it doesn't have power, cranks right but I had to reduce spark plug gap because it was like misfiring. Could it be the ignition coil? i checked them with a multimeter and i read 6.4 k ohm, they are ac delco d555. Its that right? i don't know the exactly value. Could it be a sensor problem? Thanks in advance.
#30 of 65 it will not run by ar_mon_do Jan 26, 2008 (11:05 am)
My baby is not running well. First let me say I have a 1996 Trooper 2.4 V6. In the morning it will start, run and even drive around. But with in a short time it will not go over 40, then 25 to a point where it chug along to a stop. If I pop it into neutral it will stay running but barely. The "check engine" light is flashing on and off too. I have had a few suggestions from friends; catalytic converter? fuel pump? It has a GM engine. kidding I love my trooper, it is my 3rd one. Transmission? Replies to this message: atfdmike (Jan 28, 2008 10:14 am)
#31 of 65 Re: it will not run [ar_mon_do] by atfdmike Jan 28, 2008 (10:14 am)
Replying to: ar_mon_do (Jan 26, 2008 11:05 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 65 Trooper stalls or rough idle by dcoll 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 Replies to this message: atfdmike (Feb 12, 2008 7:27 am) dcoll (Feb 13, 2008 6:41 am)
#33 of 65 Re: Trooper stalls or rough idle [dcoll] by atfdmike Feb 12, 2008 (7:27 am)
Replying to: dcoll (Feb 11, 2008 5:31 pm) 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 65 1998 trooper engine, 152k miles, head gasket by bobbycar 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 65 Re: Trooper stalls or rough idle [dcoll] by dcoll Feb 13, 2008 (6:41 am)
Replying to: dcoll (Feb 11, 2008 5:31 pm) 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

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