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Discussion Starter · #1 ·
i have a '88 trooper with a 2.6L 4 cyl. eng. and within the last few months i have noticed a major loss of power :cry: especially when going up hills. on flat land it is not as noticeable but is evident. i have done a complete tune-up (plugs, wires, cap, fuel filter, etc.) and i have had to advance the timing quite a bit and i have to run it with the a\c fan on (for higher idle) to get it to idle halfway decent until it is warmed up then it idles smoother. i really love my truck and want to keep her, so any help in my fight to get her running good again would be greatly appreciated. :lol: so if anyone has any helpful advice or similar problem experiences with hints it would be so great.
 

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Discussion Starter · #4 ·
Thanks for the info. I replaced the muffler and ran through some "Lucas performance" fuel injector and upper cylinder cleaner and noticed a slight difference. I am going to check the valve clearance next. Also noticed that my auto-choke isn't working when i first start it. Thanks again for the info.
 

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Discussion Starter · #5 ·
Thanks for the help everyone, but the culprit was the woodriff(?) key. I read about it in another post. The SOB was worn so bad and the insides of the timing gear and crankshaft pulley were notched out like you wouldn't believe. With those like that it was throwing off the timing so much that the truck would hardly run at all. So hopefully if anyone else reads this it will help them, check every little thing cause you never know. Isuzu's rule!!!!!
 
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