1989 Trooper Suddenly runs Poorly

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Re: 1989 Trooper Suddenly runs Poorly [Re: Trooperx2] #805846 04/24/07 03:25 AM

Joined: Dec 2003

Posts: 354

Twin Cities

acy76

Mudrunner

While the likelihood of cap/rotor failure may be low based on the mileage, I would still inspect them. Sometimes you can actually see traces in the plastic from misfiring - be sure to tilt them around in the light, paying close attention to possible paths between the cap pins. You never know...

Good luck - and let us know what you find.

1988 Isuzu Trooper LS
2.8l Isuzu 4JB1-TC intercooled turbo diesel
www.dieseltrooper.blogspot.com

Re: 1989 Trooper Suddenly runs Poorly [Re: acy76] #805847 04/26/07 05:13 AM

Joined: Mar 2002

Posts: 108

Edmonton, Alberta Canada

coldrain

Wheeler

I also had a similar problem on a different car, It would run fine for a while then just run really crappy, no power or "get up and go". The issue was trace to bad ERG valve.

Something else to look at, If temperature changes occur or damp weather, look to the distributor cap, it may have a hair line crack.

Re: 1989 Trooper Suddenly runs Poorly [Re: coldrain] #805848 04/27/07 06:24 PM

Joined: Feb 2005

Posts: 15

Trooperx2

Need a Spot

Ok, thanks for the suggestions. I have not been able to work on it this week but have compiled all your responses and will get at it this weekend.

I sure hope you guys are right and it turns out to be something easy like the dist. cap or plug wires; I'm due for a little luck here since I'm getting tired of driving my daughter's '87 Honda to work; it's just plain embarassing!

Randy

Re: 1989 Trooper Suddenly runs Poorly [Re: Trooperx2] #805849 05/11/07 10:57 PM

Joined: Feb 2005

Posts: 15

Trooperx2

Need a Spot

I've been out of town again the past couple of weeks but did do the compression test last night. The number 2 and 3 cylinders are less than 10 psi (1 and 4 were at 135 to 150)so I must have a valve or ring issue. I'll be pulling the head this weekend unless anyone has any other tests or areas to look at that are less invasive but I think this pretty much narrows the problem down.

Thanks again for all the suggestions.

Randy

Re: 1989 Trooper Suddenly runs Poorly [Re: Trooperx2] #805850 05/11/07 11:02 PM

Joined: Aug 2002

Posts: 3,007

Lockhart, TX

Richard Saylor Offline

Roll Me Over

Nope, your head gasket and probably the head are gone. That's why 2 AND 3 are down. They're leaking into each other. I think just about every one of us that has had the 2.6 has had this issue. More than likely the head is either cracked or warped right there. Generally the bottom ends are pretty stout so there's not much reason to get down in there. At over 150,000 miles mine still had the factory crosshatching in the bores.

Richard <img src="/forums/images/graemlins/patriot.gif" alt="" />

Had an 89 Isuzu Pickup
Had a 94 Mitsubishi Eclipse
84 Honda XL185S
Had an 89 Isuzu Trooper w/ 3.4 V6
01 Toyota Tundra SR5 V8 4Door Access Cab
http://community.webshots.com/user/rsayloriii

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