Cruise Control more aggravating then helpful - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 08-30-2013, 05:14 PM Thread Starter
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Cruise Control more aggravating then helpful

Alright guys I have googled a bunch and I couldnt find any articles relating to this particular problem. Well im not even sure if its a problem but doesnt seem like how its should operate. First off I have a 2008 6.4 job 3 with an egr delete, edge race tuner(running level 2 tow tune for now bout to upgrade to a spartan), dpf delete and cold air intake. Now when ever I turn on cruise control and hit any kind of grade especially while towing the transmission drops down a gear or two depending on the grade i guess and load it senses and then revs to the roof and maxes out the boost. This whole process is very abrubt and aggressive. Egts start off stable but then start to climb rather quickly. This is usually when I turn off cruise and control the throttle manually. Now if I hit a grade while controlling the throttle myself I barely have to lean on the skinny pedal just a tad more and she chugs right on up the hill without missing a beat or loosing a mph. So is this kind of thing normal with these trucks or this an actual problem.

2008 F-350 Lariat TRCCSB Lifted, Tuned, and Deleted
2003 Mach1 Bassani, 4.10s, pro5.0, bama tuned

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post #2 of 5 Old 09-02-2013, 06:57 AM
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What is the boost right before it downshifts?

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post #3 of 5 Old 09-02-2013, 07:35 AM
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zero cruise control issues with either of my H&S equipped 08's
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post #4 of 5 Old 09-02-2013, 08:14 AM Thread Starter
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I'm not sure exactly I wanna say I remeber it being around 20 to 25# pounds and climbing and then when it downshifts it maxs out the stock boost gauge. Thanks for the info drunk on diesel i'm kinda wondering if my tuner is causing this guess ill fund out once I get my spartan installed.

2008 F-350 Lariat TRCCSB Lifted, Tuned, and Deleted
2003 Mach1 Bassani, 4.10s, pro5.0, bama tuned

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post #5 of 5 Old 09-02-2013, 08:49 AM
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I prefer my truck to downshift. not really on the hills, but my H&S will TC lock in 5th gear and while pulling my skidsteer you can watch the egts go up 300 plus degrees until it shifts down a gear. it could be your truck wanting to keep cooler EGTs.
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