computer
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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?
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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.
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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.
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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?
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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.
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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.
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