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West Point
The Library
6.4 Tech & FAQ
Weird rev limiter issue.
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[QUOTE="Petro, post: 1564439, member: 751"] Finally got around to putting an engine together for my 08 that cracked a piston in early 2021. Bored the block. 020 over, rcd stage 2 cam, 72mm low pressure, stock injectors, stock pump, mini max etc etc. Buttoned it up almost a month ago, truck runs great. No codes, no leaks, runs very smooth. Here's the issue, the truck has what I can best describe as a rev limiter at 3200 to 3800. The more aggressive you are on the throttle, the sooner it hits a limiter. This is driving or free revving, doesn't matter. If I stab thr throttle very hard, it will bounce off 3200 just like a factory limiter. If I'm more gentle with the throttle and slowly ease into it, it will spin 4k as intended. Occasionally it won't do this at all but it happens almost every time I get on the throttle. What's also odd is every time it bounces on this "rev limiter" the battery light comes on. It also turns off my cruise control, soo if I go to hit resume, my cruise doesn't work until I push the on button again. Things over gone over. Batteries are brand new and hold a constant 14 volts all the time according to my minimal and my snap-on scanner. Connections are all clean. Checked them multiple times. When it does this rail pressure drops but according to my snap on scanner it's commanded. The pump holds a solid 24k in my street tune, falls off a little in my big tune but this issue is apparent in even the stock tune soo I'm sure it's not a pump issue. It never throws a code of any sort. I tried retuning, made no difference. These are also the tunes I had before the truck blew up initially and it ran flawless before. Soo sorry for the long post, tried to cover about everything. Let me know if anyone has any ideas because I'm out of them. I work on a large amount of these and have never seen or heard of this issue soo hopefully one of you has some ideas or insight. [/QUOTE]
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6.4 Tech & FAQ
Weird rev limiter issue.
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