mustang back fire

[topher5150]

my friend has a 1996 (first year of the 4.6) Mustang GT. he recently did a tune up, plugs, wires, and an BBK(?) cold air kit. now he says after driving it a few minuets it starts back firing and missing. he said that he used a timing light and said it seemed ever so slightly off, he also said that he bought NAPA wires. any ideas. i want to kick his ass at the strip this summer, the fair way

 

[ground_zero298]

put the wires on right

 

[XLRVIII]

coolant leak, passenger side intake manifold, check the rear two plugs on the passenger side.

they probably have coolant in the plug wells.

Common issue with the early 4.6 2v motors.

 

[ground_zero298]

he should have seen the coolant when he did the plugs and wires.

 

[XLRVIII]

put the wires on right

if the wires were on wrong it would run like crap all the time, not just after it warms up.

 

[ground_zero298]

True but if ones not on all the way you will have a raw fuel build up in the exhaust and gas in the oil after a couple of minutes.