Question about 1994 Mitsubishi Montero

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1993 nh pajero 3 LTR running on 5 CYL

1993 nh pajero 3LTR is running on 5 cylinders, i have changed the plugs,leads,dizzy cap,rotor button,lifters. you can pull number 1 lead off the plug and there is no change in the running of engine you pull any of the others off and it runs worse,which means number 1 is not firing. i have compresion number 1 plug sparks from lead, so i dont know what else to look at to fix the problem i also checked to make sure i had power to the injector. CAN YOU PLEASE HELP ME WITH THIS PROBLEM ANYTHING COULD BE A BIG HELP THANKYOU

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  • Anonymous Mar 27, 2014

    Number 1 spark plug

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Hi Roy,
You say you have compression? is it well within the range of the other cylinders? if it is i.e. around 100 psi then possible bent or sticking valve? although you have a spark when plug earthed out of head is there possibly some foreign matter isolating the plug or is it the plug itself breaking/tracking down when in situe?
Failing all these, try a small amount of fuel direct into the cylinder to see if it fires briefly (Not too much just a couple of mls)
Maybe possible Head gasket failure? (I doubt it as all other cyls fine)
Can't think of anything else I would try,
Hope this helps!
Paul 'W'
Onyer~EDson(:0)~[><U.K.

Posted on Jan 13, 2009

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