Question about 1988 Isuzu Trooper 2 Door

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1988 isuzu trooper ll 4wd back firing and running ruff

I just purchased this little honey for 100.00$ so I did expect a little to be wrong. I've had to replace the fuel pump and also new filter. It had been sitting for a couple of years so I assume things are a llittle gummed up in the throttle box. I have ran several fuel additives through her after flushing the tank 3-4 times. I now take off down the road and she runs real well but then out of no where I get popping and back firing enough to blow out that new muffler I just put on..LOL I'm also on my 3rd fuel filter now thinking one of these times she'll straighten right out, fuel filters at 10.00$ a pop how many more should I expect? I'm thinking its timing but why is it so at random? please help if you can. thx, Jeff

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Check your timing

Posted on Dec 14, 2008

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