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Isuzu Trooper Engine Misfire

32 messages,  Last post on Jun 01, 2009 at 8:34 AM

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What is this discussion about? Isuzu Trooper, Isuzu Trooper II, Electrical, Engine, Exhaust, SUV

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#3 of 32 Re: Engine Misfire-OBD Code P0300 [boxtrooper] by laparka55 Mar 10, 2007 (5:01 pm)
Replying to: boxtrooper (Feb 26, 2007 7:11 pm) I've been having the same stalling issues. How much does it cost to have intake manifold gaskets replaced? Replies to this message: boxtrooper (Mar 10, 2007 8:25 pm)
#4 of 32 Re: Engine Misfire-OBD Code P0300 [laparka55] by boxtrooper Mar 10, 2007 (8:25 pm)
Replying to: laparka55 (Mar 10, 2007 5:01 pm) I don't remember the cost, but the labor was a lot and the gaskets are complicated since they are a thermal barrier so they were not inexpensive either. I had mine done here: http://www.creechimport.com 919-872-1999
#5 of 32 95 Trooper 3.2 SOHC Misfire and black smoke by marknroll Mar 17, 2007 (6:25 pm)
Alright I've searched the history and dug as far back as I can to find an answer with no luck! My Trooper has 173K on it, timing belt done at 120K and regular service done always. I was driving for a while, maybe 2 months, with an intermittent check engine light. It would only come on while driving around 50-60 mph then when it would come down to idle speed it would go off. Then one day it started misfiring and bellowing black smoke!!! I had an oil change , fuel and air filter done and she ran fine, FOR A WHILE!!! Then all the sudden it's back the bogging, the smoke. I've replaced plug wires, new Bosch platinum plus 2 spark plugs and new O2 sensor(it was black as were the plugs) and it still is missing??? Any ideas what to check next? Replies to this message: boxtrooper (Mar 18, 2007 12:50 pm) atfdmike (Mar 18, 2007 12:53 pm) landfill (Feb 13, 2008 3:59 pm) diesel3333 (May 28, 2009 8:08 am) wlbrown9 (Jun 01, 2009 8:34 am)
#6 of 32 Re: 95 Trooper 3.2 SOHC Misfire and black smoke [marknroll] by boxtrooper Mar 18, 2007 (12:50 pm)
Replying to: marknroll (Mar 17, 2007 6:25 pm) Black smoke means it is not burning the fuel completely, maybe loss of spark or too much fuel. Maybe the plugs are all firing, but the computer is sending too much fuel. .. Is the loss of power extreme when it smokes? That might favor the not firing scenario. .. Paison I think, had a failed catalytic converter slowing down the air flow and that caused power problems.
#7 of 32 Re: 95 Trooper 3.2 SOHC Misfire and black smoke [marknroll] by atfdmike Mar 18, 2007 (12:53 pm)
Replying to: marknroll (Mar 17, 2007 6:25 pm) Hi, did you check the ECM for codes when this started? I would hazard an EGR valve/module issue. Good luck.
#8 of 32 Re: 95 Trooper 3.2 SOHC Misfire and black smoke [marknroll] by landfill Feb 13, 2008 (3:59 pm)
Replying to: marknroll (Mar 17, 2007 6:25 pm) My 92 trooper has the same problem. Have you found a solution?
#9 of 32 engine misfire by mdenman1 Feb 16, 2008 (2:44 pm)
I've had an ongoing problem with the engine having a intermittant misfire, i have cleaned the egr valve and tube, replaced 2 O2 sensors, replaced spark plugs, replaced 1 coil pack, and all tube and valve cover gaskets, but my problem persists. I'm now noticing a rusty oily material in the spark plug tubes. It appears as though the oil and water conbined and evaporated in the tube. I was thinking head gasket, but it seems to me the gasket should not be involve in the spark plug tube, so now i am at a loss. the codes read misfire # 4 cylinder and i replaced that spark plug. Any suggestion would be a good suggestion at this point Replies to this message: atfdmike (Feb 16, 2008 4:15 pm) landfill (Feb 16, 2008 9:06 pm) atfdmike (Feb 18, 2008 3:03 am) mdenman1 (Feb 17, 2008 7:49 pm) steve_ (Feb 17, 2008 7:51 pm) atfdmike (Feb 18, 2008 3:13 am)
#10 of 32 Re: engine misfire [mdenman1] by atfdmike Feb 16, 2008 (4:15 pm)
Replying to: mdenman1 (Feb 16, 2008 2:44 pm) What engine are you having this problem with? Generally, I have only heard of antifreeze in the spark plug tubes when the head is cracked. It does happen but pretty rare. More likely the spark plug wire tube seals are letting moisture in. How about spark plug wires.....how old and what condition are they? They may look OK, but age and use can cause their conductance to deteriorate. HTH One guys opinion. Replies to this message: landfill (Feb 16, 2008 9:06 pm) atfdmike (Feb 18, 2008 3:03 am) mdenman1 (Feb 17, 2008 7:49 pm) steve_ (Feb 17, 2008 7:51 pm) atfdmike (Feb 18, 2008 3:13 am)
#11 of 32 Re: engine misfire [atfdmike] by landfill Feb 16, 2008 (9:06 pm)
Replying to: atfdmike (Feb 16, 2008 4:15 pm) Your opinion for mdenman may be right on mine. My 3.2 sohc is stalling, huffing and puffing clouds of black smoke intermitenty. The wires are old. When I pulled one, the seal stayed on the plug. The tube came out though, but the plug could not be removed. Any ideas on how to get that seal off the plug would be helpful. The 5 plugs are still out and I haven't tried to restart it since I replaced the o2 sensor.   Also, where is the connector for the code reader ( i looked )and the location of the crank sensor? Replies to this message: atfdmike (Feb 18, 2008 3:03 am)
#12 of 32 Re: engine misfire [atfdmike] by mdenman1 Feb 17, 2008 (7:49 pm)
Replying to: atfdmike (Feb 16, 2008 4:15 pm) I'm sorry my trooper is a 1999, there are no plug wires and each cyclinder has a coil pack, the liquid is water/oil mixture and maybe condensation could be part of the problem, i have bought a new coil pack and replaced the old one but still have the problem. Also can anyone tell me how to change my email address? I just switched to comcast and my address has changed Replies to this message: steve_ (Feb 17, 2008 7:51 pm) atfdmike (Feb 18, 2008 3:13 am)

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