OK people, I need a silver bullet here. My 84 5-speed rustbucket (2wd) has decided it doesn't like full throttle anymore. 1st and 2nd are OK, but go WOT in 3rd or higher and it quits just after hitting 3000 RPM. The pause is momentary - about 3-5 seconds, then it lights up again but only for another 5-10 secs. before beginning the routine all over again. Momentary fuel starvation is my guess, I'm hoping one of you can say "Aha!!" and share your experience before I start digging. (The Hitachi has been rebuilt by me - successfully - last year so it's clean and tight) All comments gratefully accepted.

Cheap and easy, replace ur fuel filter

 

I had similar problems about a 2 weeks ago and the fuel filter was filthy:drunk:

 

Bought a new one and BINGO

Cheap and easy, replace ur fuel filter

 

I had similar problems about a 2 weeks ago and the fuel filter was filthy:drunk:

 

Bought a new one and BINGO

Yup change it 4x a year. Every new season.

The filter that is normally the culprit is the one

back by the fuel pump under the car.

 

This the main or "primary"

filter. It is the one that seldom gets changed

and is first in the line of defense against

dirt and therefore takes the biggest hit.

 

BTW

The one under the hood is called a

"Vapor Separator"

 

Hope this helps, most of us "carb types"

have BTDT

on this problem

The filter that is normally the culprit is the one

back by the fuel pump under the car.

 

This the main or "primary"

filter. It is the one that seldom gets changed

and is first in the line of defense against

dirt and therefore takes the biggest hit.

 

BTW

The one under the hood is called a

"Vapor Separator"

 

Hope this helps, most of us "carb types"

have BTDT

on this problem

Thanks folks. I ordered filters today and I was advised there are 2 filters, primary and secondary. Am I to assume the secondary refers to the "vapor separator" or should I follow the old rule that says "NEVER ASSUME!"? A word of advice would be welcome while I wait till the truck gets to Oliver on Monday with my parts. Cheers!!

If the filter(s) don't do it, your pickup in the fuel tank could be plugged. Happened on one of my XT's.

OK, I got the primary and secondary fuel filters and I'm still not clear as to the location of the "secondary" one. My Hanes makes no mention of one. They are both white nylon, the "secondary" having one inlet and one outlet. Anyone?

One filter is at the fuel pump, has 1 in and 1 out. Other one is under hood, by the Master Cylinder. Has 3 lines, 1 in from pump, 1 out to carb, 1 small line on top that's a return to tank line.

Thanks everyone. Both filters installed and problem solved. One look at the rear filter full of rust-colored sediment told the tale. I previously had to change a rusted-out and leaking filler pipe but of course ignored the filter that was hiding behind the splash shield. USMB does it again!! (For the record the Fram part ##s are G4167 and G4917 - about 6 bucks ea. Canadian)

 

Paul

Alright!

 

 

For the record, I worked on a car this summer in which the culprit was actually the secondary filter under the hood, so even though it's usually the primary one, just replace them both.