head-scratcher
Thread Starter
|
New User
Joined: Jan 2009
Posts: 9
Likes: 0
From: Georgia
head-scratcher
Hi All,
I'm working on this 2004 F-150 Supercab STX 4x4 4.6 V8. For a customer. The customer complaint is that on cool or cold mornings, the truck will do a near-stall and shudder somewhat with little or no response for sometimes 10 seconds upon acceleration from that first stop after a cold start. The rest of the stops, no problem. The rest of the day, no problem. I have done some things to the truck to address this problem, but to no avail. Check engine light was on for a short time, code was for Cyl .Head Temp Sensor. Replaced that, and the temp guage reads pretty low now.
Any ideas are appreciated, I need to hear them all.
David
I'm working on this 2004 F-150 Supercab STX 4x4 4.6 V8. For a customer. The customer complaint is that on cool or cold mornings, the truck will do a near-stall and shudder somewhat with little or no response for sometimes 10 seconds upon acceleration from that first stop after a cold start. The rest of the stops, no problem. The rest of the day, no problem. I have done some things to the truck to address this problem, but to no avail. Check engine light was on for a short time, code was for Cyl .Head Temp Sensor. Replaced that, and the temp guage reads pretty low now.
Any ideas are appreciated, I need to hear them all.
David
Posting Guru
Joined: Nov 2007
Posts: 2,158
Likes: 0
From: West Texas
Everytime I hear stall or shudder on those I pull the coils and plug boots before anything else. Look for signs of arcing on the boots or any condensation on them or in the holes. Just a little tiny bit can cause it.
That temp sensor code could have been caused by the thermostat not working. I've seen it before.
That temp sensor code could have been caused by the thermostat not working. I've seen it before.
Posting Guru
Joined: Nov 2007
Posts: 2,158
Likes: 0
From: West Texas
I've seen moisture do that a lot. Also small cracks in the boots can be open on a cold engine letting a missfire happen. The heat could be causing them to swell. Moisture down there is the cause of probably 90% of the problems on these engines. In this cold and damp weather it's even more likely that is the problem.
Thread Starter
|
New User
Joined: Jan 2009
Posts: 9
Likes: 0
From: Georgia
No IAC. Fly by wire. I did give the T.B. a cleaning, no difference. Remember, only happens once during the whole day.
Trending Topics
Thread Starter
|
New User
Joined: Jan 2009
Posts: 9
Likes: 0
From: Georgia
NOTE: Truck had a very poor battery and alternator, I replaced both. Could any sensors have suffered? Any guidelines on checking T.P.S. health/function?
Thanks.
Thanks.
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
Postmaster
Joined: Aug 2004
Posts: 3,392
Likes: 0
From: Greenvile, SC
....your customer usually start thier day off with less than a full tank of fuel? Any chance the moisture is going from the tank through the lines into the rail and/or possible that thier plugs need to be changed as well as coupled with the moisture?
Thread Starter
|
New User
Joined: Jan 2009
Posts: 9
Likes: 0
From: Georgia
Yes, very rarely has a full tank, usually around 1/4 at a time. Does the fuel rail need to be removed to get to the coil over plugs? I have heard bad things about plugs in these engines, is it a risk for me to remove them?
They are original with 80,000 miles on them.
Thanks Trigger
They are original with 80,000 miles on them.
Thanks Trigger
Thread
Thread Starter
Forum
Replies
Last Post
Jaime74656
1987 - 1996 F150 & Larger F-Series Trucks
268
Sep 11, 2015 07:01 PM
73FOMO
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
8
Dec 16, 2010 09:05 AM
