Ford 6.7L Power Stroke Diesel :: Cruise Control Won't Engage?
Nov 9, 2014
I had a nice level straight stretch in front of me and engaged the cruise control. No go! I tried a few more times and it still did not engage, even with various button sequences. My thought was that this truck is a computer on wheels. So at the next opportunity I stopped and shutdown the engine, turned the ignition switch OFF and then restarted started the engine (and rebooted the computer). The cruise control works fine!
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I have a 6.7 diesel extcab longbed 4wd with the 3.31 rearend. I have been experiencing a surge primarily told by the boost gauge when using the cruise control unloaded and either or both going up a steady climb in elevation or headwind. It does not surge if I shift down to 5th. Does not occur pulling a load. Still occurs in manual mode and tow-haul mode. Does not occur if your controlling throttle with your foot. I find that it happens at speed of 65-70. It will boost to about 10 pounds then fall to about 3 and will continue this until maybe a hill or change in direction. It does not occur with a tail wind. I took it to the dealer today and ford had a new flash for the pcm and the tcm. Hoping that this would fix it but I don't believe it did.
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Just looking for comments on using the cruise control while towing? and what's the recommended weight for using the tow haul mode. The enclosed trailer I have is about 3300 lbs. taking it across the country empty. 2004 6 liter.
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Here is the issue i am having. 2011 F-350 King ranch with all bells and whistles. In Arizona now we are in the season that the weather is cold in the AM and sometimes hot enough in the late afternoon to need the A/C in the truck. with the settings on Auto which i normally do, and the external temp reading in the 80s, and the internal thermostat set at 70 or lower, the A/C compressor will not engage and allow for cooling the cab of the truck. But sometimes it will work just fine. I am assuming there is a temp sensor for cabin temperature. Where that is located. or will i have to change out the entire Climate Control Module. I would take it in to have it checked out but it is an intermittent problem, and i cant not have my truck for a couple of days while they try and figure it out.
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My cruise control stopped working today on my trip back from Yosemite. Tried looking through the owners manual, but apparently it doesnt have its own fuse. Everything else seems to work just fine, so I am gonna start there.
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I have been trying to figure my cruise control not working. I verified the switch for the brake pedal and the one on the master cylinder are not the problem. I have read about the clock spring but would like to verify signal is passing through/ not before replacing.
2 Questions.
#1 I have is how does the overall system work? Ok not that in depth but, is there some kind of servo that regulates the flow to,the injectors or is it strictly controlled by the PCM? and it tell the injectors to open to allow fuel to pass.
#2 Looking for a wiring diagram for the cruise control control circuit. Namely looking to verify switches are working.
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I recently purchased the 2006 Mazda Tribute and the previous owner has confirmed the cruise was not working. What I have looked at:
Checked fuses
checked cable and connections
check connections at unit
What I have is the cruise will power on (light on dash comes on) but it does not appear to engage. I tried to use the diagnostics built into the car, where you hold the off button and turn the key on. I get a flash for off, and on, but do not get a flash when I push the resume button.
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2000 F 150, 4.2 v6, M5OD-2 Manual Transmission, LX, reg cab .. Cruise Control passed all static and dynamic self test. All fuses inside and under hood checked good and still cruse control will not engage. All other functions work: brake lights, turn signals, etc. Green cruise light is operational, checked pin #10 on wiring harness at servo,amplifier unit under hood and have good ground. The Cruise ON button will not turn on cruise control system and will not light green cruse light.
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Well, last night I took my F-350 up a wheeling trail. I'd been up quite a few times in my old Rover, so I knew I could go a ways in without damage. Just uphill, muddy, and ruts / rock steps.
One thing I notice is that when you engage low range in the diesel, the transmission starts in 2nd gear. My previous gas Super Duties always started in 1st. I'm assuming this is to protect the transfer case from torque overload. Also, the throttle response seems to change when low is engaged (the pedal becomes less responsive, which is nice).
I've had the gas Super Duties off road before, and all of mine have had the locking rear diff. The diesel lugged along perfectly. My biggest fear was crunching the DPF / SCR / DOC canister on a rock step. In that respect, I'd rather wheel a gas. The manual shift function makes a lot of sense in low range - you can force a start in 1st, 2nd, or 3rd. And prevent meaningless up / down shifts since the grade can change quickly.
These trucks' biggest hindrance is their size. However, if you have the trail room, they are actually excellent off road. Many people look at a Super Duty and see a vehicle good only for pulling or hauling. Not so, these trucks are as good as a Jeep off road, again with trail room being the only concern. The locking rear diff was never really needed, but I engaged and disengaged a few times to keep the mechanism free. I really love this feature.
One thing that happens frequently for me in north-east wheeling is water crossings. Could be a simple brook but mostly it is mud holes encountered on tight trails. In some cases these are only a foot or so deep; in other cases they are 4 feet deep. Ford states to "try" to keep the water below the level of the hubs, which amounts to about 15". Aside from possible front axle contamination, my biggest concern would be the electronics on the diesel which are mounted to the frame or floor pan (transmission module, NOx module, etc.) The gas Super Duties don't have these concerns. In the old days, as long as a diesel had air, the engine would run under water. This engine requires electronic control of many things, including the injectors...so it won't. There are also some axle / transmission breathers which run about floor pan high to be concerned about, but these can be easily extended.
Maybe it's due to the twisty frame which GM loves to insult Ford about, but these trucks have excellent wheel articulation. I'd be surprised if a coil sprung power wagon flexed more, at least in the rear. I'm impressed.
Finally, the traction control. I experimented a bit on a slippery rock step. This was the only step which required the rear locker - sort of. The front wheels climbed the step, but the back flexed to the point of one rear wheel basically almost off the ground and severely unloaded. With 4x4 Low engaged, and traction control "off" as much as Ford will allow, the truck could not pull itself up. Turning traction control on allowed the truck to very nearly pull itself up. A little more throttle / finesse probably would have gotten the truck over, but lots of ETC operation glazes the brakes and spews brake dust everywhere. Being able to start in a higher gear manually really adjusts the torque control. Locking the rear end and the loaded wheel bit right in and she went up and over.
When doing some off-road driving, the "off-road" screen for those of you with the LCD message center is kind of fun and informative to watch. It's nice to see how far your wheels are turned left or right when spinning in ruts or what crazy angle your truck is on. Howie Long could probably document the exact up / down / left / right slope angle a Super Duty needs to be on in order for the tailgate not to open. I never had an reason to open the tailgate while in these crazy angles, of course.
Overall, very impressed. It's not as good as my old Range Rover, but I would say more talented off road than ALL other Ford vehicles except the Raptor.
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On my commute home today I tried to engage cruise only to find that would not engage. I cycled the switch a few times but that didn't work. I told a friend of mine about it and he mentioned that he experienced problems with his cruise on his GTI after he had switched the units on the MFD. Even though I didn't switch my units, when I got home I put the car in park and changed the units from U.S. MPH to KM/H and then back again to U.S. MPH. Lo and behold, cruise worked again afterward. Strange.
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I have a 2003 that won't engage all the time. I have manual locking hubs.
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This has happened 3 or 4 times now while driving down the road. Just cruising down the road the CC will just cut out. I'll hit the "set accel" button on the wheel and all is good again until it randomly decides to do it again.
The only thing I've changed recently is the rear end speed sensor to cure the ABS light. I wouldn't/didn't think this would have any effect on the cruise control, but IDK, maybe I'll put the original one back in and test it.
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Cruise just stopped working. The fuses all check out ok. What would be the next simplest thing that I could check before turning the problem over to a mechanic?
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So the PO tells me he was flying down the highway and went to cancel his cruise control and it wouldn't turn off. He claims he made it to the shoulder of the highway and killed the ignition. When he restarted the truck is was turned off and it hasn't been used since. I tried to use it yesterday but couldn't get it to work?
So I do the search and find out that the deactivation switch is most likely the issue. I just picked up a new one today and was curious if it is just a R & R thing or if it needs to be bleed off or something? Is there a need to test it or just change it out? Sound like something that would cause these issues?
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I searched here, but could not find anything. My cruise control would not engage this morning. Worked fine yesterday on the way home. Of course the car just passed 30K Miles (now at 30,800) and will be out of warranty. I looked in the owners manual and could not find the number for the fuse and if it is in the right or left panel on the dash.
I will also check tonight when driving home if I can shift into gear w/o pushing the brake and if the green "push break pedal" indicator comes on or not when I try to shift into gear w/o pushing the break pedal. I read on this forum that this could indicate a fault in one of the switches at the brake pedal.
BTW, it's a 2010 Touareg with the 3.6L V6 and 30,800 Miles on it. So, what fuse to check??
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I have a 2.4 camry with 1 big mystery. I can't get the cruise control to engage. I've tried everything, took it to toyota who put it on the computer, but nothing is showing, no faults anywhere, and i mean none, every switch for the cruise comes up as working fully and the light also comes on for it.
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I have a 2003 F350 6.0 liter crew cab. It's all stock minus the FICM and bullet proof I did a few years ago when I purchased the truck. truck runs amazing with 136K miles on her, but i rarely drive the truck and she's been sitting. SO, I went out to start her up because it's been in the low teens and I wanted to keep the battery up to par. When I had turned the ignition key on to start the truck (after I cycled the glow plugs), I could hear the starter spin but instead of turning the truck over, it made a grinding noise followed by a spin type sound which I assume is the drive gear of the starter not engaging. I can get her to start but it takes multiple attempts.
Once she's warmed up, it seems to stop grinding when i try and start it which makes me think it's more of a resistance issue, possibly a relay. BTW, where is the starter relay on our trucks? I am wondering if the cold has something to do with the proper power and amps to the starter via the relay causing the starter not getting enough power to the starter. Anyway, I'm hoping there is a way to diagnose this through my torque program by looking at amps but not sure which parameters to look at on torque android.....I'm hoping it's a relay problem instead of a starter problem. I really dont want to replace a starter with a bum shoulder.......in the cold to top it off
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With -37C and -50C with windchill today, I tried starting my truck after being plugged in all night, and it was a no-go. Sounded like the starter turned over but didnt engage. On another note, what is with the glow plug light? mine lights up for a few seconds, maybe, then nothing. Today was the first time it ever stayed on for 5 seconds, and that was only after i tried cranking it over twice. First two times it didnt stay on.
I think my block is still maybe too cold,maybe dead batteries too, and yes the block heater had power made sure to check that, I notice my passenger side battery has some corrosion ontop (1000watt amp hooked into drivers side) so maybe I am needing better batteries.
Usually fires right up, haven't noticed a problem lately either starting. Gonna let it warm up some more, and I put a charger on the truck too, gonna go check the battery voltages and see what it says. This is the coldest yet I have tried to start the truck.
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RPM's are dropping way off when coasting downhill while towing (as if the motor shut down), CC is on and maintaining desired speed. When at the bottom of the hill, all of a sudden, with a big bang(in the motor) the rpm's have came back up and you drive on down the road as normal. This seems to happen only when towing. "99 F250 7.3 I haven't pulled any codes as of yet. Whats happening?
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I have a 2001 f350 7.3 powerstroke electric shift 4x4 auto trans, truck cruise control just quit, no illumination at dash, when switched on, checked all fuses they are good, owners manual doesn't say much...
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I have a 2000 f250, 5.4l triton v8 that cranks like crazy, but won't start. When I spray a little starter fluid in it it will run until the spray wears off. Brand new battery and full gas tank. it does have check engine light on dash, probably from the o2 sensor as the exhaust has almost completely rusted out. Also on a side note the cruise control will not engage.
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