Help! Weird starting issue!
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Well... I really feel stupid now! But I'm also very grateful!!
The noise was from some cupping on my front tires after having run too long between rotations/balancing. I will NOT admit to how long "too long" was for me, but I have learned a valuable lesson!!
Still no word on the codes yet from the shop, but I am about determined that I'm going to very quickly be investing in AE 7.0 with a long cable so I can keep my PC inside the house but still run a cable to the truck (can run up to 50 feet, I think, but only need to go about 30 feet). Longer term plan will be an inexpensive laptop for testing "on the run".
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Here are the codes:
1) P0122 - Throttle Position Sensor - circuit low
2) P0541 - Internal Air Heater - circuit low
3) P0603 - Internal Control module - KAM (Keep Alive Memory) malfunction
Here are my comments/questions:
1) Makes sense regarding the recent hesitation on acceleration - Can this sensor be cleaned and/or replaced as a single sensor, or do I really need to replace the entire throttle pedal assembley? If complete replacementis necessary... any insights on the best place for the best price?
2) No big surprise, since I have removed the IAH... not worried at all about this code. Will at some time in teh future get the device to eliminate the code, but I have bigger fish in the pan at the moment.
3) Interesting. Could this be the infamous problem I've been experiencing since I installed my lift pump last year? The one that causes one of the modules under the steering wheel to start clicking and not allow the engine to start until I cycle the key fob several times? If so, what kind of fix is there? Any way to reset the existing module, or does it need replacement? If replace... again, suggestions for best location/price are welcome.
1) P0122 - Throttle Position Sensor - circuit low
2) P0541 - Internal Air Heater - circuit low
3) P0603 - Internal Control module - KAM (Keep Alive Memory) malfunction
Here are my comments/questions:
1) Makes sense regarding the recent hesitation on acceleration - Can this sensor be cleaned and/or replaced as a single sensor, or do I really need to replace the entire throttle pedal assembley? If complete replacementis necessary... any insights on the best place for the best price?
2) No big surprise, since I have removed the IAH... not worried at all about this code. Will at some time in teh future get the device to eliminate the code, but I have bigger fish in the pan at the moment.
3) Interesting. Could this be the infamous problem I've been experiencing since I installed my lift pump last year? The one that causes one of the modules under the steering wheel to start clicking and not allow the engine to start until I cycle the key fob several times? If so, what kind of fix is there? Any way to reset the existing module, or does it need replacement? If replace... again, suggestions for best location/price are welcome.
Thread Starter
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Senior User
Joined: May 2008
Posts: 252
Likes: 0
Here are the codes:
1) P0122 - Throttle Position Sensor - circuit low
2) P0541 - Internal Air Heater - circuit low
3) P0603 - Internal Control module - KAM (Keep Alive Memory) malfunction
Here are my comments/questions:
1) Makes sense regarding the recent hesitation on acceleration - Can this sensor be cleaned and/or replaced as a single sensor, or do I really need to replace the entire throttle pedal assembley? If complete replacementis necessary... any insights on the best place for the best price?
2) No big surprise, since I have removed the IAH... not worried at all about this code. Will at some time in teh future get the device to eliminate the code, but I have bigger fish in the pan at the moment.
3) Interesting. Could this be the infamous problem I've been experiencing since I installed my lift pump last year? The one that causes one of the modules under the steering wheel to start clicking and not allow the engine to start until I cycle the key fob several times? If so, what kind of fix is there? Any way to reset the existing module, or does it need replacement? If replace... again, suggestions for best location/price are welcome.
1) P0122 - Throttle Position Sensor - circuit low
2) P0541 - Internal Air Heater - circuit low
3) P0603 - Internal Control module - KAM (Keep Alive Memory) malfunction
Here are my comments/questions:
1) Makes sense regarding the recent hesitation on acceleration - Can this sensor be cleaned and/or replaced as a single sensor, or do I really need to replace the entire throttle pedal assembley? If complete replacementis necessary... any insights on the best place for the best price?
2) No big surprise, since I have removed the IAH... not worried at all about this code. Will at some time in teh future get the device to eliminate the code, but I have bigger fish in the pan at the moment.
3) Interesting. Could this be the infamous problem I've been experiencing since I installed my lift pump last year? The one that causes one of the modules under the steering wheel to start clicking and not allow the engine to start until I cycle the key fob several times? If so, what kind of fix is there? Any way to reset the existing module, or does it need replacement? If replace... again, suggestions for best location/price are welcome.
Hotshot
Joined: Jan 2008
Posts: 13,144
Likes: 11
From: Rochdale MA
Here are the codes:
1) P0122 - Throttle Position Sensor - circuit low
2) P0541 - Internal Air Heater - circuit low
3) P0603 - Internal Control module - KAM (Keep Alive Memory) malfunction
Here are my comments/questions:
1) Makes sense regarding the recent hesitation on acceleration - Can this sensor be cleaned and/or replaced as a single sensor, or do I really need to replace the entire throttle pedal assembley? If complete replacementis necessary... any insights on the best place for the best price?
2) No big surprise, since I have removed the IAH... not worried at all about this code. Will at some time in teh future get the device to eliminate the code, but I have bigger fish in the pan at the moment.
3) Interesting. Could this be the infamous problem I've been experiencing since I installed my lift pump last year? The one that causes one of the modules under the steering wheel to start clicking and not allow the engine to start until I cycle the key fob several times? If so, what kind of fix is there? Any way to reset the existing module, or does it need replacement? If replace... again, suggestions for best location/price are welcome.
1) P0122 - Throttle Position Sensor - circuit low
2) P0541 - Internal Air Heater - circuit low
3) P0603 - Internal Control module - KAM (Keep Alive Memory) malfunction
Here are my comments/questions:
1) Makes sense regarding the recent hesitation on acceleration - Can this sensor be cleaned and/or replaced as a single sensor, or do I really need to replace the entire throttle pedal assembley? If complete replacementis necessary... any insights on the best place for the best price?
2) No big surprise, since I have removed the IAH... not worried at all about this code. Will at some time in teh future get the device to eliminate the code, but I have bigger fish in the pan at the moment.
3) Interesting. Could this be the infamous problem I've been experiencing since I installed my lift pump last year? The one that causes one of the modules under the steering wheel to start clicking and not allow the engine to start until I cycle the key fob several times? If so, what kind of fix is there? Any way to reset the existing module, or does it need replacement? If replace... again, suggestions for best location/price are welcome.
Pete IIRC the TPS is very inexpensive and very quickly changed out. I just bought some 470 ohn 1\2 watt resistors and made a fooler for my AIH. I will be pulling that out soon. I will make one up for you and send it out if you'd like.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Pete, don't forget you can get phantom codes too. Did they clear the codes, test drive, then retest? I've seen the TPS code on my truck a few times after one of the AE upgrades. Cleared the codes & it didn't come back.
The 0603 can be caused from disconnecting the batteries as you mentioned. It can also come from loose or corroded cables which could explain the clicking, and can also be thrown by a chip / tuner.
I don't recall anything about your lift pump. Did you install a lift pump in the tank or other location? Did you use the factory wiring or run new wires to it? If new wires, where did you pull power from? If existing wiring, what's the amp / voltage draw of the new pump compared to stock? Just throwing some additional ideas out there that our electrical inclined friends might see something with.
The 0603 can be caused from disconnecting the batteries as you mentioned. It can also come from loose or corroded cables which could explain the clicking, and can also be thrown by a chip / tuner.
I don't recall anything about your lift pump. Did you install a lift pump in the tank or other location? Did you use the factory wiring or run new wires to it? If new wires, where did you pull power from? If existing wiring, what's the amp / voltage draw of the new pump compared to stock? Just throwing some additional ideas out there that our electrical inclined friends might see something with.
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Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Chris... yes, the phantom codes can be an issue, but since I have been noticing an acceleration "hiccup", I think this one might be real. Knowing that the TPS is such a common issue, I'll probably get a price and change it if for no other reason thatn to be proactive, but I think it will clear up my accel issues.
I still have never pulled my PCM to check for a chip, and I really need to do that. I know that the PCM has either been flashed or has a chip because it runs better than stock. Otherwise, I would not be able to run over 115mph the way I've been able to ever since I go tthe truck 2 years ago.
The lift pump....
- installed between the tank and the stocker, Baldwin filter between the lift pump and tank
- ran new power supply straight from the driver side battery with an inline fuse
- ran a jumper off the existing power line to the stocker to a relay switch so that the lift pump would come on with the key on and also lose power if the stock pump lost power - this jumper is "permissive" only on the relay
- have not checked amp/voltage draw on either pump... excellent thought! I'll have to check that one
Jim... that's awfully nice of you, my friend. I would be grateful!
I still have never pulled my PCM to check for a chip, and I really need to do that. I know that the PCM has either been flashed or has a chip because it runs better than stock. Otherwise, I would not be able to run over 115mph the way I've been able to ever since I go tthe truck 2 years ago.
The lift pump....
- installed between the tank and the stocker, Baldwin filter between the lift pump and tank
- ran new power supply straight from the driver side battery with an inline fuse
- ran a jumper off the existing power line to the stocker to a relay switch so that the lift pump would come on with the key on and also lose power if the stock pump lost power - this jumper is "permissive" only on the relay
- have not checked amp/voltage draw on either pump... excellent thought! I'll have to check that one
Jim... that's awfully nice of you, my friend. I would be grateful!
Gone Fishin for Mark
Joined: Nov 2004
Posts: 1,354
Likes: 2
From: West of Houston
Pete, if you need to replace the throttle position sensor, you do not have to buy the whole pedal assembly. O'reilly sells the sensor by itself. It is a Dorman product. You can search Throttle Position Sensor here for more. IIRC it is about $50. Easy swap.
For some reason I am on my 3rd.
For some reason I am on my 3rd.
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Thanks, Andrew.
Joe, I actually managed to locate the TPS from Millineum Ford (Y2K) in Washington state, and it was only $35. I also ordered the brackets for my new '08 console so I can get that little puppy in place pretty soon, too.
On the starting issue, it almost is beginning to seem like the truck is starting almost as good as it used to, and I haven't done anything except replace the CPS.
I took the gray unit out that I had purchased/installed last June, and had not been having any typical CPS symptoms at all, but decided to swap it back out with the original black unit that was running well when I got the gray one... did that because of the reports of two cylinders not in spec on rotational velocity in other engines where the gray unit was running. There have also been reports of increased mileage with the black units compared to the gray ones, and my first tank on the black unit seems to be a little better, but the jury is still out on that issue for me.
Joe, I actually managed to locate the TPS from Millineum Ford (Y2K) in Washington state, and it was only $35. I also ordered the brackets for my new '08 console so I can get that little puppy in place pretty soon, too.
On the starting issue, it almost is beginning to seem like the truck is starting almost as good as it used to, and I haven't done anything except replace the CPS.
I took the gray unit out that I had purchased/installed last June, and had not been having any typical CPS symptoms at all, but decided to swap it back out with the original black unit that was running well when I got the gray one... did that because of the reports of two cylinders not in spec on rotational velocity in other engines where the gray unit was running. There have also been reports of increased mileage with the black units compared to the gray ones, and my first tank on the black unit seems to be a little better, but the jury is still out on that issue for me.
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