Engine hesitation question
Thread Starter
|
Senior User
Joined: Jun 2012
Posts: 139
Likes: 0
Engine hesitation question
It's done this since I've owned it and I never thought much about it but i'd like to know if this might be a common thing or if there is something I can do to fix it. I do know that the previous owner put new points, rotor, and a distributor cap in it.
When I put my truck in gear and push on the throttle, there is a very slight hesitation that lasts only a second or so. When I sit at idle after startup it seems to be fine, I can rev it all day long with no hesitation. I ran a can of Seafoam through the front tank and it didn't fix it. Any ideas of what it might be? 97 F250HD with the 460.
When I put my truck in gear and push on the throttle, there is a very slight hesitation that lasts only a second or so. When I sit at idle after startup it seems to be fine, I can rev it all day long with no hesitation. I ran a can of Seafoam through the front tank and it didn't fix it. Any ideas of what it might be? 97 F250HD with the 460.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
There are no points in a 1997 Ford anything including your F250. I see no mention of replacing spark plugs, wires or fuel/air filters. Start with the basics then work your way out from there.
You should also check for codes. Many times there can be a problem or code stored in Continuous Memory (CM) without turning on the MIL light.
You should also check for codes. Many times there can be a problem or code stored in Continuous Memory (CM) without turning on the MIL light.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
If it has good power while driving besides the hesitation, I would suspect a faulty TPS or MAP sensor causing the hesitation.
First pull the codes, then I'd grab a multimeter and check the TPS voltage with the key on, engine off. The voltage should rise smoothly and steadily as you open the throttle, and be between 0.5 and 1.1 volts at the idle position.
Does it hesitate with the engine hot, cold, or both?
First pull the codes, then I'd grab a multimeter and check the TPS voltage with the key on, engine off. The voltage should rise smoothly and steadily as you open the throttle, and be between 0.5 and 1.1 volts at the idle position.
Does it hesitate with the engine hot, cold, or both?
Thread Starter
|
Senior User
Joined: Jun 2012
Posts: 139
Likes: 0
It does it when it's hot or cold and only when I initially hit the throttle. The throttle is a bit stiff when I push it down too, don't know if that has anything to do with it but I thought i'd mention it.
As far as the dist cap and such, I didn't know it didn't have points but I do know the previous owner changed the cap and the plug wires look new also. I'll check the plugs while i'm at it.
How do I check codes, this truck does not have OBD II on it but I do know that it has a connector under the hood, can't remember what it is called though.
As far as the dist cap and such, I didn't know it didn't have points but I do know the previous owner changed the cap and the plug wires look new also. I'll check the plugs while i'm at it.
How do I check codes, this truck does not have OBD II on it but I do know that it has a connector under the hood, can't remember what it is called though.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
Some refer to it as the Test connector, Data Link, etc. Follow this: Fuel Injection Technical Library » How To Run a Self-Test
Or purchase one of these: Equus 3145 Code Reader
Or purchase one of these: Equus 3145 Code Reader
Trending Topics
Thread Starter
|
Senior User
Joined: Jun 2012
Posts: 139
Likes: 0
OK, I did the self test and it came back with a system pass code of 1 1 1. I Guess i'll start checking the simple stuff first and see what I can dig up.
Thanks for the link rla2005.
Thanks for the link rla2005.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
Senior User
Joined: Jun 2012
Posts: 139
Likes: 0
I thought I would post up what I found on this hesitation problem. I finally got around to getting a timing light so I disconnected the SPOUT connector and checked the timing, it was down near 7* so I adjusted it to about 11* and the hesitation disappeared and it seems to get up and go a bit better. Hoping it might help just a tad with mpg but if it doesn't that's ok.