My truck has me baffled

[Lou hoods&more]

Ok I'm about to take a hatchet to my truck it has me pulling my hair out!!

I did a run up the hill (Flagstaff) and on the way back it ran like crap. I was thinking it's the gas in Flag and the elevation since you go from 900ft to 7000ft elevation. I mean it ran so bad all the way back I about had a nervous breakdown.

So I get back into the valley and it runs fine.......a day of rest then back to hitting the bricks, guess what it's running rough very rough top speed 35mph if I can get it into 4th otherwise is shakes rattles and barely rolls. This has me baffled.

I'll research a little and get under the hood come sun up. If anyone has any ideas I'm all ears at this point.

Oh btw it's a 300 straight 6 has always been very dependable .....although it doesn't like hills and seems to hate Flagstaff.

On a side note it was cold up there.

 

[Grant]

Fuel filter??

 

[Lou hoods&more]

Fuel filter??

I hope it's that simple.

It is EFI and loaded with all that smog *%#* I'm real temped to rip all that out so the engine can breath.

 

[Russ Johnson]

Could be a catalytic converter clogging up.

 

[MHasterok]

Maybe the continueom transfunctioner? (LOL, a little humor from a movie).

Hope you get it fixed Lou!

 

[Alexy]

MAF sensor
take it to a autozone and they will read it here is a list of the codes for a ford pick up truck
http://ucables.com/OBD2-DTC-error-codes/ford-dtc-obd2-trouble-codes.pdf

 

[Larry Millette]

I will almost guarantee that you have a vacuum hose leak. :idea: :yeah:

 

[Vince Wood]

I say the O2 sensor. Your truck might have 2 of them though.

 

[Big Mike]

I'll agree with Larry on the vacuum leak.

 

[Scott Stone]

I agree with Larry. Vacuum hose leak.

 

[Lou hoods&more]

Ok no vacuum leak, fuel filter and fuel pressure are good. We're thinking one or both of the cats (yes there are two) are plugged:banghead::banghead:. Since it runs much better cold than once it warms up.

And apparently it's to old to put on a sensor they tell me it must be 95 or newer.

 

[Squirtgun]

Delete them or gut them

 

[Lou hoods&more]

Delete them or gut them

How many carbon credits would that operation cost I wonder?:rap:

 

[Russ Spence]

could it be the "Flux Capacitor"? You would need it to generate the 1.21 gigawatts of electricity needed to get up to Flagstaff and back!

 

[Christopher]

could it be the "Flux Capacitor"? You would need it to generate the 1.21 gigawatts of electricity needed to get up to Flagstaff and back!

You are fast Russ! I was going to mention the flux capacitor.

 

[Russ Spence]

http://www.youtube.com/watch?v=8AMXdMARaiA

 

[Lou hoods&more]

Well we're leaning toward hot spots on the clutch plate. I got 3 gigs tonight and a couple tomorrow then I'll drop the tranny and figure it out.


Funny stuff Russ!

 

[Tampa450]

Ok no vacuum leak, fuel filter and fuel pressure are good. We're thinking one or both of the cats (yes there are two) are plugged:banghead::banghead:. Since it runs much better cold than once it warms up.

And apparently it's to old to put on a sensor they tell me it must be 95 or newer.

Find a mechanic with the right scan tool.
It might be worth paying a few bucks...to find the cause of the problem

 

[Christopher]

What ever happened?

What was the problem?

 

[E-P-W]

MASS (mass air flow sensor) is the most likely cause.

Take it out and clean it.

What year is the truck?