1999 Mercury Villager 1999 Villager engine misfire

JSAID

MEMBER
1999 MERCURY VILLAGER
6 CYL
2WD
AUTOMATIC
125,000 MILES

Cylinder 1 and 3 does not firing. Engine code is PO300. The dealer said the injectors 1 and 3 are bad. I changed all the injectors on the rear bank (cyl 1, 3 and 5) plus spark plugs, wires, dist cup, rotor etc and also tried with another distributor and the problem continues.
The cylinder 1 and 3 not working, there are good spark and compression but I think the 1 and 3 injectors are not injecting fuel.
Please help

5 Replies

BLACKOP555

MECHANIC
10,371 POSTS

Check the pick up coil wire in the distributor.

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Friday, December 28th, 2007 AT 9:58 AM

JSAID

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3 POSTS

I already tried with a brand new distributor, but the problem continues

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Friday, December 28th, 2007 AT 10:36 AM

BLACKOP555

MECHANIC
10,371 POSTS

Are the 1 adn 3 injectors working? They should be making a buzzing sound if they are working, if they are not check for pulse at them.

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Friday, December 28th, 2007 AT 11:36 AM

JSAID

MEMBER
3 POSTS

I don't think that 1 and 3 injectors are working because when I take out the wires from them (when the engine is running) there is no difference, it continues failing.

I cannot hear the clicking sound of 1 and 3 injectors when I use the stetoscope, either.

I have changed everything but the computer. Shall I be considering a flaw in the computer at this stage?

Thank you

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Friday, December 28th, 2007 AT 12:34 PM

BLACKOP555

MECHANIC
10,371 POSTS

Check for voltage at the injectors. If thers voltage/pulse and the injectors arnt firing then they must be bad.

Before calling it the computer have the crank and cam sensors checked, they tell the pcm when to fire the 1 and 3 sensors also. There may be a loose wire at the pcm.

If its not too much trouble try swaping those injectors with others. If the problem moves with them then replace the injectors.