Question about 1986 Isuzu Trooper

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Oily air filter

I have a lot of oil in my air filter especially when I go up hill. Maybe you can help me out on this? Thanks.

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  • 38 Answers

Check all your breather hoses are not blocked or kinked and that the engine is not overfilled as see so many cars with them overfilled and can cause further damage.

Posted on Dec 11, 2008

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thats what it sounds like, a bad or clogged up fuel filter. if it bogs down when giving it gas, or going up a hill. its probably the fuel filter not letting enough fuel to engine. that is why it stalls at a stop. if this helps but not fully. check or clean idle air control motor. this is what maintains proper idle of vehicle. have a good day !!

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2002 Pontiac Montana stalls in stop-and-go traffic especially on a down hill grade. Have changed gas filter. Diagnostic didn't find anything unusual.


First off, when was last healthy tune up? Plugs, plug wires, ALL filters and a good fuel system cleaning? I'd start there, then have parts store like Autozone, Advance etc.. do an OBII fault scan. I'm suspecting of tune up doesn't help maybe an oxygen sensor or a MAF (Mass Air Flow meter) are strong possibilities. But tune it first, and get scan done before just throwing parts at it.

Feb 25, 2011 | 2002 Pontiac Montana

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Losing drive power in car especially up hill. Burning a lot of gas what could be the problem.


low trans oil level.old trans oil.dirty trans filter.plus the obvious, air filter dirty, plugs need changing,ht leads weak,dirty injectors.....

Aug 26, 2010 | 1992 Oldsmobile Cutlass Ciera

1 Answer

Won't accelerate, especially up hills i suspect


I would think it's your fuel filter. It's under the hood, mounted on the firewall. Also, check the air filter. I would check the vacuum hoses for any holes or cracks.

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even if it looks okay its not okay. do a tune up on plugs, wires, if needed oil change, air filter FUEL FILTER VERY ditributor rotor, cap. important

May 08, 2010 | 1986 Nissan Pulsar

1 Answer

Oily filter


check your engine oil level when on the flat then check the engine breather because it seems that your breather is throwing oil from the engine into the intake system. hope this fixes your problem.

Sep 08, 2008 | 1986 Isuzu Trooper

1 Answer

68 ford mustang


Hi there!

This isn't going to be good news Im afraid. These symptoms are typical of head gasket failure.

Head gaskets can fail on one of 3 ways -
#1 Rupture to outside from cylinder - Lots of oil, steam, fire maybe - it's pretty obvious.
#2 Rupture from cylinder into an oilway - You burn lots of oil, blue smoke, lack of power, oil forced out of fillercap, dipstick, air filter gets black.
#3 Rupture from cylinder into coolant channel. You use water - but no leaks under car. White steamy exhaust on starting, Coolant overheats quickly and appears to boil. Inspection of coolant is sometimes oily.

Yours sounds like #3

It probably needs the cylinder head off and the gasket replaced. Quite a time consuming job, but DIY-able with the correct tools.

You can check the compression of the cylinders first just to make sure it is this and not leaks somewhere else -

Check out PetesPonies post on the mustang forum about leaks around the intake manifold. It may be easier to check this first.

Thanks for using Fixya! If it solves your problem, please rate as such. Thank you.

Jul 03, 2008 | 1966 Ford Mustang

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