Looses power/stutters under load
10-07-2006, 02:26 PM
#1
1st Gear Member
Thread Starter
Join Date: Apr 2005
Posts: 102
Looses power/stutters under load
I have a 89 f-150 truck, with the 5.0 that misfires/stutters/looses power under load. It started a few days ago on the highway and now it does it everywhere.
I changed the fuel filter and put dry gas in it. The truck idles fine it just doesn't run good under load.
Any ideas?
And i know this is a mustang forum but ive posted here before and gotten lots of help so im crossing my fingers.
Edit:
The lights also flicker on and off now. Its odd.
I changed the fuel filter and put dry gas in it. The truck idles fine it just doesn't run good under load.
Any ideas?
And i know this is a mustang forum but ive posted here before and gotten lots of help so im crossing my fingers.
Edit:
The lights also flicker on and off now. Its odd.
10-07-2006, 03:00 PM
#2
5th Gear Member
Join Date: Jan 2006
Location: Severn, Md
Posts: 2,298
RE: Looses power/stutters under load
As for the spuddering and loss of power, you were on the right track. Pick up a fuel pressure tester set, you can nab them on ebay for 50 bucks or less, and check out your fuel pressure at idle, and while driving. It should be about 37psi with the vacume line off, and shouldnt drop much below that.
10-07-2006, 11:20 PM
#4
1st Gear Member
Thread Starter
Join Date: Apr 2005
Posts: 102
RE: Looses power/stutters under load
Ok, ill check the distributor cap tomorrow
I ordered a inline fuel regulator, its about a foot towards the gas tank from the fuel filter.
My pumps work because i switched both tanks and it still stutters on both tanks.
the truck used to do it at 75 mph, now it does it real bad, and i can barely get through town at 25 mph.
if the inline fuel regulator doesnt fix it what other ideas do we have?
I ordered a inline fuel regulator, its about a foot towards the gas tank from the fuel filter.
My pumps work because i switched both tanks and it still stutters on both tanks.
the truck used to do it at 75 mph, now it does it real bad, and i can barely get through town at 25 mph.
if the inline fuel regulator doesnt fix it what other ideas do we have?
10-07-2006, 11:37 PM
#5
4th Gear Member
Join Date: Aug 2006
Location: Cape May County, NJ
Posts: 1,097
RE: Looses power/stutters under load
I had the same problem wiht my f-150 i repalced almost everything finaly i go ta scan tools did a self test and it had a intermitent fault in the module in the distrubtor . so i replaced teh whole thing becuas ethe needle bearing in the dizzy were worn so bad it want worth takinh it apart to change it
10-07-2006, 11:42 PM
#6
1st Gear Member
Thread Starter
Join Date: Apr 2005
Posts: 102
RE: Looses power/stutters under load
ORIGINAL: PONY GUY
I had the same problem wiht my f-150 i repalced almost everything finaly i go ta scan tools did a self test and it had a intermitent fault in the module in the distrubtor . so i replaced teh whole thing becuas ethe needle bearing in the dizzy were worn so bad it want worth takinh it apart to change it
I had the same problem wiht my f-150 i repalced almost everything finaly i go ta scan tools did a self test and it had a intermitent fault in the module in the distrubtor . so i replaced teh whole thing becuas ethe needle bearing in the dizzy were worn so bad it want worth takinh it apart to change it
10-14-2006, 06:34 PM
#9
1st Gear Member
Thread Starter
Join Date: Apr 2005
Posts: 102
RE: Looses power/stutters under load
They checked the coil and the distributor, still a no go. Going to get it scanned tuesday.
Now if it was a plug or wire, how come it only stutters when warm or under load?
Now if it was a plug or wire, how come it only stutters when warm or under load?
