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I just bought a 95 isuzu trooper 3.2 sohc that, upon acceleration, starts to miss badly and although it goes faster, it sounds and feels like it's running on half power. It's like if you driv

Plugs and wires have been replaced. It was running on five cylinders. The valve covers may be leaking.

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  • Cars & Trucks Master
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If it seems to be running on all 6 cylinders at idle but not under a load, and you think the ignition system is good, the problem may be a fuel injector or low fuel pressure.
You could also have a weak coil that is killing two cylinders.

Posted on Jan 17, 2013

  • Robert Scarborough
    Robert Scarborough Jan 18, 2013

    Thank you. I'm going to go through the fuel system first.

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Posted on Jan 02, 2017

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duane_wong
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SOURCE: My 1990 isuzu trooper was driven to town when it

replacing the head gasket solved one problem.
But, you have a leakage problem with oil and/or antifreeze now.
The head gasket could be failing again, or you have a cracked block or cylinder head.

Take it back to where it was worked on and say that you want it fixed, please.

good luck on this.

Posted on Jul 10, 2010

cameron_goul
  • 108 Answers

SOURCE: Just replaced valve cover gasket, plugs and plug wires. Now she smokes like crazy when she didn't before and sounds like running on 3 cylinders. Any ideas?

check to ensure that the plugs are torqued in to spec, the wires are completely snapped on and that you didnt put the wrong wires to the wrong plugs. thats for the 3 cyl's problem. as for the smoking, it could be the valve cover gasket because if its leaking, it will drop oil onto the sides of the engine which is way hotter than the oil normally is making it smoke. that would make it smoke out of the hood/eng compartment. if its smoking out of the exhaust pipe, then its probably a different problem

Posted on Oct 20, 2012

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replacing the head gasket solved one problem.
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