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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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#30 of 32 Re: error code p1340 ignightion controle misfire 2001 trooper [atfdmike] by wlbrown9 Oct 22, 2008 (6:16 am)
Replying to: atfdmike (Oct 22, 2008 3:59 am) I have a '00 Trooper with the Champion plugs from the factory. Replaced them with the exact same and have never had an issue with knocking. The following are what the manual shows for '00:   Manual: K16PR-P11 PK16PR11 RC10PYP4 (Champion I believe)   Bill
#31 of 32 Re: 95 Trooper 3.2 SOHC Misfire and black smoke [marknroll] by diesel3333 May 28, 2009 (8:08 am)
Replying to: marknroll (Mar 17, 2007 6:25 pm) I hate to dredge up an old thread but came across your experience while researching about a similar experience I'm having with my 2000 Trooper. The engine bogs at 40-45 mph and won't maintain speed (65-75 mph) in top gear on the highway. An abrupt downshift brings back the power and speed but after the resulting upshift back to fourth gear, no amount of throttle will maintain speed. After about two cycles of this shifting and bogging/lugging, the CEL will flash but doesn't leave a code. Upon slowing down, the CEL goes off and the engine stalls when I come to a stop. A compression test shows 150-155 psig on five cylinders and about 135 on the passenger side front cylinder. All plugs look fine (dry with a little black on the end) and the plug wires/coils also appear to be in decent shape. I will clean the EGR and PCV tonight. The trooper has about 55k miles (unless a previous owner has messed with the odo) so I'm a bit baffled by this lack of performance. Lastly, the fuel mileage has dropped from about 14 mpg to less than 12. Any help would be appreciated. Thanks in advance. Replies to this message: wlbrown9 (Jun 01, 2009 8:34 am)
#32 of 32 Re: 95 Trooper 3.2 SOHC Misfire and black smoke [diesel3333] by wlbrown9 Jun 01, 2009 (8:34 am)
Replying to: diesel3333 (May 28, 2009 8:08 am) I'm no expert and this is a shot in the dark...but how is you cat converter? It might be possible that it is starting to plug and back pressure could cause the problem with maintaining speed on the hwy. But if you can downshift and get decent performance in 3rd that might make that possibility a no. Good luck on finding a resolution.

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