cruise control surging issue
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Senior User
Joined: Dec 2007
Posts: 452
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From: Lizton, IN
I agree It is a small thing. Plus I have not been able to get it to surge again ever since I've started this thread.
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Senior User
Joined: Dec 2007
Posts: 452
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From: Lizton, IN
Well I took the boat down to lake cumberland over the weekend and the cruise worked like a charm.
Last night I unhitched the boat and went for a spin. The cruise controll acted up again. Seems like the extra weight of a trailer makes it work right.
Last night I unhitched the boat and went for a spin. The cruise controll acted up again. Seems like the extra weight of a trailer makes it work right.
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
Or maybe there's something going on with the brake light circuit, affecting the cruise, that isn't happening when the trailer wiring is connected. I suppose you could (1) try it with a lighter trailer or the trailer without the boat, and/or (2) try it with the full load, but with the trailer wiring disconnected (unless trailer brakes are needed).
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Senior User
Joined: Dec 2007
Posts: 452
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From: Lizton, IN
Or maybe there's something going on with the brake light circuit, affecting the cruise, that isn't happening when the trailer wiring is connected. I suppose you could (1) try it with a lighter trailer or the trailer without the boat, and/or (2) try it with the full load, but with the trailer wiring disconnected (unless trailer brakes are needed).
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
IMO the surging is still there with a trailer connected...you just don't feel it in the butt-o-meter because of the additional load it needs to move with small throttle inputs.
Our CC's are simple and very sensitive compared to gassers. It's handled solely by the PCM because we have 'fly-by-wire' throttles unlike our gas counterparts that have a throttle cable and servo/amplifier actually pulling on the throttle.
The RABS signal is measured in hertz (Hz). A Hz signal can be affected by stray electrical fields very easily... especially when all the wiring/sensors/connectors get corroded/loose with age. Hard to believe on 15 year old trucks.
My 2 cents
Our CC's are simple and very sensitive compared to gassers. It's handled solely by the PCM because we have 'fly-by-wire' throttles unlike our gas counterparts that have a throttle cable and servo/amplifier actually pulling on the throttle.
The RABS signal is measured in hertz (Hz). A Hz signal can be affected by stray electrical fields very easily... especially when all the wiring/sensors/connectors get corroded/loose with age. Hard to believe on 15 year old trucks.
My 2 cents
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Senior User
Joined: Dec 2007
Posts: 452
Likes: 0
From: Lizton, IN
IMO the surging is still there with a trailer connected...you just don't feel it in the butt-o-meter because of the additional load it needs to move with small throttle inputs.
Our CC's are simple and very sensitive compared to gassers. It's handled solely by the PCM because we have 'fly-by-wire' throttles unlike our gas counterparts that have a throttle cable and servo/amplifier actually pulling on the throttle.
The RABS signal is measured in hertz (Hz). A Hz signal can be affected by stray electrical fields very easily... especially when all the wiring/sensors/connectors get corroded/loose with age. Hard to believe on 15 year old trucks.
My 2 cents
Our CC's are simple and very sensitive compared to gassers. It's handled solely by the PCM because we have 'fly-by-wire' throttles unlike our gas counterparts that have a throttle cable and servo/amplifier actually pulling on the throttle.
The RABS signal is measured in hertz (Hz). A Hz signal can be affected by stray electrical fields very easily... especially when all the wiring/sensors/connectors get corroded/loose with age. Hard to believe on 15 year old trucks.
My 2 cents
I bet your right. I'm going to try to disconnect it anyway to make sure. But I'm betting it won't be there.
So, you say the PCM could have something to do with it or corroded wiring, the RABS? I hope it's not wiring, I'm not a big fan of it. but like you said these trucks are not young bucks anymore and this stuff happens...
I should also mention again that this just started to occur once I put my chip in. Could it be because the chip isn't installed incorrectly? Not sure how I could have screwed it up. I cleaned it up good and followed the directions to the T.
What does a VSS or RABS run at the stealership? I may go throw one on and see if I can fix it that way.
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Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
you can get one from any parts store.. autozone, napa, oriely's.. wherever. i bought one for a buddy one time and i think it was around 20 bucks. not too bad for a sensor that can do lots of bad things to our trucks when it goes out. i have had this surging in my CC for awhile too. very small surges, but you can definitely feel it. it's like the truck is just vibrating a little til you turn off the CC then it is smooth.. haven't even tried to fix it though b/c i barely use the CC anyways.
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Senior User
Joined: Dec 2007
Posts: 452
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From: Lizton, IN
you can get one from any parts store.. autozone, napa, oriely's.. wherever. i bought one for a buddy one time and i think it was around 20 bucks. not too bad for a sensor that can do lots of bad things to our trucks when it goes out. i have had this surging in my CC for awhile too. very small surges, but you can definitely feel it. it's like the truck is just vibrating a little til you turn off the CC then it is smooth.. haven't even tried to fix it though b/c i barely use the CC anyways.
I wonder...would a bad RABS affect fuel mileage any? I would think a slight surging would use excess fuel. Would it also affect mileage when not using the CC?
My mileage is not the greatest.
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
i don't think it would hurt fuel mileage much if at all. mine is doing the same thing and i get 21 mpg on the highway at 60-65 mph.
might have something to do with i have stage 1's and you have the stage 2's though. haha
might have something to do with i have stage 1's and you have the stage 2's though. haha
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Senior User
Joined: Dec 2007
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From: Lizton, IN
4x4 versus your 4x2
4.10 versus well I don't know your rear end
Plus I have problems maintaining 60-65, I usually run the speed limit or a little more 70-75.
All of these would add up to a significant mileage difference in your favor. Mayby I'm doing just fine with mileage once all things are considered. I can get 14.5 mpg when driving normally, back roads and rairly any interstate driving-plus only a 5 minute drive to and from work. I just took a boat probably 3-4000# on a trip and I got 14.78 mpg at a 70 mph clip somethimes 75. So I may be close to what I should be doing. I've never got more than 17.5 mpg's and that was all highway in illinois at 65 mph right when I bought the truck 5 years ago. And i swear the 285's Mickey Thopmspn Baja ATZ rubbers i have on have hurt my mileage a little.
I know the stage 2's are not helping , but I can honestly say my mileage is not any worse than before i put them in.
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Senior User
Joined: Dec 2007
Posts: 452
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From: Lizton, IN
Update: I believe I found the culprit. Left work yesterday and noticed a back tire looked a little low. It was actually 45 pounds (rated 65 cold). Put more air in it and hit the intersate. I drove 40 miles on CC and it was smooth as can be.
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