computer
Thread Starter
|
New User
Joined: Mar 2015
Posts: 7
Likes: 0
computer
I have a 1999 ford f250 super duty with a 5.4l. The fuel injectors will not shut off when its running and sometimes will not start. I'm told its the computer. I found a higher amp fuse in the spot for the computer. Its suppose to have a 5 amp and I found a 15 amp there. Would this cause it and would it repair it if I placed the right fuse there? Or did it do some damage?
Elder User
Joined: Jan 2002
Posts: 780
Likes: 0
Your description of the problem is inaccurate. The 15 vs 5 amp fuse should be corrected, then find someone who knows how to troubleshoot the problem. Your original post indicates that neither you nor whoever told you that it was the computer should be working on this problem.
Elder User
Joined: Jan 2002
Posts: 780
Likes: 0
OK, I understand now why you said that, but it still indicates a lack of knowledge of how to troubleshoot the problem.
First,
is a ridiculous statement.
Second, I would need a lot more definitive statement than "it's the computer". Tell me what trouble codes are present. Tell me what is wrong with the computer. Does it have a bad driver? What is it not doing that gives a reason to say that it is bad. A lot of perfectly good PCMs get replaced on a guess, because the real problem cannot be identified.
I hate to say it, but I know for a fact that some techs at some dealers are just not up to the task of proper troubleshooting. Especially if the problem is intermittent.
I think you need another opinion from a different tech.
First,
The fuel injectors will not shut off when its running
Second, I would need a lot more definitive statement than "it's the computer". Tell me what trouble codes are present. Tell me what is wrong with the computer. Does it have a bad driver? What is it not doing that gives a reason to say that it is bad. A lot of perfectly good PCMs get replaced on a guess, because the real problem cannot be identified.
I hate to say it, but I know for a fact that some techs at some dealers are just not up to the task of proper troubleshooting. Especially if the problem is intermittent.
I think you need another opinion from a different tech.
Thread Starter
|
New User
Joined: Mar 2015
Posts: 7
Likes: 0
computer
Trouble code p1288. They did not say what in the PCM is Bab. When it runs it runs at about 2000 rpm and slowly goes down to 1200 rpm and will not go down any more then that. The code says it is the cylinder head temperature sensor. And after it warms up it will not restart. I'm told there are other computers in my truck other then the PCM. Is that right?
Trending Topics
Elder User
Joined: Jan 2002
Posts: 780
Likes: 0
I'm told there are other computers in my truck other then the PCM. Is that right?
Here is your troubleshooting list:
Possible causes
- Wrong thermostat
- Not at operating range
- Engine overheated
- Low engine coolant level
- Faulty Cylinder Head Temperature (CHT) sensor
- Cylinder Head Temperature (CHT) sensor harness is open or shorted
- Cylinder Head Temperature (CHT) sensor circuit poor electrical connection
If the CHT sensor (or it's wiring) is faulty, all of your symptoms would exist. You need to verify the wiring going to the sensor and check/verify the other items listed above. If all checks OK, replace the CHT sensor. (Remember the 5 amp fuse. This may have started with a blown fuse. Check that wiring harness carefully.)
If the problem persists (not likely), repost and we will discuss troubleshooting the PCM.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
New User
Joined: Mar 2015
Posts: 7
Likes: 0
Now I'm having a more serious problem. Last night I replaced the Ac accumulator. Now I'm losing all gauges and lights. The battery is draining fast. But the truck stays running. But when shur down it needs a jump start. I put in a new alternator. And battery. But still does the same.
Thread
Thread Starter
Forum
Replies
Last Post
wirelessengineer
1968-Present E-Series Van/Cutaway/Chassis
11
Nov 10, 2015 09:34 AM
79F150Seattle
1973 - 1979 F-100 & Larger F-Series Trucks
1
Aug 15, 2011 05:29 PM
ididntdoit99
Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics
4
May 22, 2008 10:48 PM
Zoomie331r
Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics
1
Jul 25, 2004 11:16 AM