MISS ON CYL. 2 AND 5

1990 Ford F-150

Tiny

billyboy1983

August, 23, 2013 AT 2:54 PM

4.9 ltr. Straight 6 missing on 2 and 5 cyl. Good compression, fire, gas, timing and new computer. Pulled a code 81, air management 2 circuit failure. Any ideas because i've run out. Billy

FOUND 354 RELATED QUESTIONS

5 Answers

Tiny

mhpautos

August, 23, 2013 AT 6:09 PM

Faulty distributor cap, vacuum leads check these first.

Tiny

billyboy1983

August, 26, 2013 AT 10:34 AM

Replaced distributer cap, rotor button and all vacuum leads seem to be ok. Still have a dead miss.
HELP.

Tiny

mhpautos

August, 27, 2013 AT 3:18 AM

Do you know what the spark voltage is, do you have a good hot blue spark?

Tiny

billyboy1983

August, 27, 2013 AT 11:36 AM

I have a blue spark on all cylinder's.

Tiny

mhpautos

August, 29, 2013 AT 2:45 AM

I feel that there must be a vacuum leak affecting these cylinders, ensure that this is not the case first.

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