I have a 4.6 now that it's cold The truck starts missing in overdrive on up hill at 60 to 65.The hills from valley to anc .Turn off od runs fine ,Whatsss up

 

Hi Murray. Is the 4.6 in the F150?? If you do not get any answers you might want to ask this same question in that section.

 

No it is in a F250 4x4 with 48,000 on it

 

Sorry it is a 1999

 

Ok I would suggest posting this in the Super Duty section. Someone there might had a suggestion

 

the 4.6 is not a superduty engine it would be the light duty

 

what are your rpms while you are in overdrive? and are there any other symtpoms that its has?

 

also are you in 4hi or 2hi

 

Rpms ? No rpm guage running in 2hi .Just start missing on a incline

 

what is your gear ratio in the rear axle you just may be at too low RPM, its possible anyway or you may just be hitting ice and then pavement on the incline. does this happen on any incline or just this one? if its just that one try another incline and see what happens.

 

on any incline, no ice on the road, If I keep my speed up Like 70 run fine I like going the speed limit,gear ratio? It is a stock truck from ford I think they would put the right rear end in but never know .

 

do you have any check engine light? it is possible that you have a bad coil pack and it is arcing to the side or a air leak around the intake or a hose...

 

Had snap on code reader on it ,it shows on missing ,must be trani will take it there and see what they say