wierd fuel problem?
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Freshman User
Joined: Mar 2006
Posts: 49
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From: Sunny Ft Lauderdale
wierd fuel problem?
Hey guys. I have a 2002 F350 and lately the truck will just die for a second. (all the electrical stays on lights, etc) If I have my foot on the gas it will die for a second and then continue running normal. If I have my foot off the gas (at an idle) it will just die. When this happens 3 things may happen.
1) it will start right back up
2) it will start after several attempts. (usually within a minute)
3) it wont start until I pull the neg cable off the driver side battery and put it back on. Then it fires right up every time.
I have noticed my battery light coming on here and there. I have a new alternator and both batteries are new. Any ideas?
Thanks in advance....
1) it will start right back up
2) it will start after several attempts. (usually within a minute)
3) it wont start until I pull the neg cable off the driver side battery and put it back on. Then it fires right up every time.
I have noticed my battery light coming on here and there. I have a new alternator and both batteries are new. Any ideas?
Thanks in advance....
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
Likes: 1
From: Northern Colorado
It sounds like the typical CPS problem except that I have not heard of anyone pulling the battery cable.
Ford has a recall on the CPS but their Grey one is not any better, try and find a new black CPS.
Ford has a recall on the CPS but their Grey one is not any better, try and find a new black CPS.
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
Likes: 1
From: Northern Colorado
Looking at the post again, the battery indicator makes it all look suspicious. It may not be CPS but rather a bad ground somewhere that is causing the battery light to be intermittent.
Check all of your grounds from the alt and batteries and make sure that they are clean and tight.
Check all of your grounds from the alt and batteries and make sure that they are clean and tight.
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Freshman User
Joined: Mar 2006
Posts: 49
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From: Sunny Ft Lauderdale
I thought when the CPS went that was it. Truck was dead until you replaced it. Does the CPS give you intermittent troubles? Truck has 200k miles on it and I think it has the original CPS. re battery: I have cleaned the posts and terminals on the both batteries. Think hooking it up to a diagnostic will shed any light or should I just replace the CPS and see what happens?
Elder User
Joined: Mar 2003
Posts: 699
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From: northern Michigan
I have seen the CPS cause the truck to stop like you turned it off and then will restart or may have to let it sit for 15 minutes and then restarts. Problems at that point tend to go down high fairly fast. They also can fail outright and leave you stranded. Usually the black ones are good for about 75,000 miles. I haven't heard any life expentancies on the grey ones yet.
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Freshman User
Joined: Mar 2006
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From: Sunny Ft Lauderdale
can anyone shed some light on taking off and on the neg battery terminal. It starts back up every time. It happened again today on my lunch break. Truck just died. I did the battery trick and it fired right up. It's the battery on the drivers side. Do the left and right batteries power different electrical parts on the truck?
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Elder User
Joined: Mar 2003
Posts: 699
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From: northern Michigan
The batteries are in parallel and you would need to pull both ground cables to remove power from the buss, unless the other ground cable is where you have the bad connection. But if that were true you would also have starting issues as the other battery would not recharge.
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Freshman User
Joined: Mar 2006
Posts: 49
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From: Sunny Ft Lauderdale
I will try the cable wiggle next time. All I can tell you is every time it wont start, removing and re-connecting the neg on the drivers side battery works without fail. I have doen it a dozen times.
Posting Guru
Joined: Jul 2004
Posts: 1,777
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From: Buckingham, IA
Have you checked the end of the ground cable that bolts to the truck, not the battery. When you take the cable off the battery, you are moving the whole cable which could cause a bad connection to improve, thereby allowing the truck to start and run. Unbolt the cable, clean the surfaces and reconnect. Do this to both ground cables to see if it helps.
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Freshman User
Joined: Mar 2006
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From: Sunny Ft Lauderdale
FIXED IT :-) Changed the CPS and that did it. Truck was exhibiting all the problems outlined on guzzler’s CPS page Welcome to guzzle's CPS R&R Web Page<. It was very helpful as well. The only thing I did differently was to change the CPS from the top of the engine. I pulled the belt off the alternator and that gave me the room I needed down the left side around the fan shroud. As far as the battery light, it still appears here and there. I cleaned al the terminals and posts and even re spliced the battery terminals but it still lights up here and there. Probably a bad ground somewhere.