i have a 1988 for f150 and it has great power up until 40 mph. after that it sharply goes down and i speed up slowly. this is a problem especially when i am towing or hauling anything and trying to get up to highway speeds. what can i do to change this. it is a 5.0 V8 with a 5 speed manual tranny

Asked by Jul 11, 2012 at 08:49 AM about the 1988 Ford F-350

Question type: Maintenance & Repair

5 Answers


Could be a restricted/plugged fuel filter.


I would say some restriction in fuel flow either filter, injectors, or fuel pump.


I agree on the fuel flow issue. The reason I stated fuel filter is because it's the cheapest to replace, and part of regular maintenance. A good place to start from.


And I agree, start with the least expensive repair first.

Make sure the EGR is operational and not half on the toilet seat!

Your Answer

Add photo

Related Questions


Looking for a Used F-350 in your area?

CarGurus has 294 nationwide F-350 listings starting at $6,500.


Search Ford F-350 Questions

Ford F-350 Experts

#1 tennisshoes
Reputation 120
#1 BoholMark
Reputation 120
#3 Alexander Curtis
Alexander Curtis
Reputation 80
View All

Related Models For Sale

Used Ford F-250
481 listings starting at $3,475
Used Ford F-150
2,198 Great Deals out of 206,316 listings starting at $1,499

Used Cars For Sale

1996 Ford F-350 For Sale
36 listings starting at $6,900
1994 Ford F-350 For Sale
25 listings starting at $6,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.