Engine shaking while driving
Thread Starter
|
New User
Joined: Mar 2009
Posts: 22
Likes: 0
Engine shaking while driving
I have a 96 F250 with a straight 6 in it and a 5 speed. When I am driving in about any gear on a light pedal the engine shakes and the truck bucks, like it is dropping a cylinder. As soon as I push down on the gas a little more it clears right out and runs great. I have replaced the plugs, wires, cap and rotor, the fuel filter and air filter, and also the IAC motor trying to figure this out. Any ideas on what to try next? I have also checked for vaccum leaks and did not find any.
PLEASE HELP
PLEASE HELP
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
You have a laundry list of stuff to check out first.
- What's the fuel pressure at idle? Does it jump to about 60 when you take the vacuum line off the FPR?
- Pull the codes?
- What does a vacuum gauge look like if you attach one?
- When was the last tune up, including all filters and ignition parts?
- What's the timing set at? (unlikely to be the direct cause but it would be good to know)
- What's the fuel pressure at idle? Does it jump to about 60 when you take the vacuum line off the FPR?
- Pull the codes?
- What does a vacuum gauge look like if you attach one?
- When was the last tune up, including all filters and ignition parts?
- What's the timing set at? (unlikely to be the direct cause but it would be good to know)
Trending Topics
Postmaster
Joined: Oct 2006
Posts: 4,056
Likes: 0
From: Waterford, CT
I have a 96 F250 with a straight 6 in it and a 5 speed. When I am driving in about any gear on a light pedal the engine shakes and the truck bucks, like it is dropping a cylinder. As soon as I push down on the gas a little more it clears right out and runs great. I have replaced the plugs, wires, cap and rotor, the fuel filter and air filter, and also the IAC motor trying to figure this out. Any ideas on what to try next? I have also checked for vaccum leaks and did not find any.
PLEASE HELP
PLEASE HELP
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
More Turbo
Joined: Sep 2003
Posts: 630
Likes: 4
From: Northeast
Mine developed a slight stumble, only at approx. 1,700 RPM, after I disconnected the battery, which wiped the memory of the ECU. But that is supposed to clear up after a certain number of drive cycles.
Lots of good advice here, re: codes, etc....
Good luck.
Lots of good advice here, re: codes, etc....
Good luck.
Thread
Thread Starter
Forum
Replies
Last Post
Mctod22
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
11
Jul 31, 2011 10:50 PM
BroncoBoss351
1978 - 1996 Big Bronco
13
May 13, 2006 12:37 PM
