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Truck will not go over 4,000 RPM.
Posted: Wed Aug 19, 2015 12:22 am
by RotorWolf
So the first time I experienced this, I went through about a foot of water at about 15 mph slowed down after the wave.. Then punched it and it was like I hit a wall at 4,000 RPM, I let off then accelerated through 50 mph (below 4k). So I stopped and punched it again and the same thing happened wall at 4k. Once I got home I shut the truck off and went straight for the air box thinking I ingested some water and found it dry as a bone. Take my truck for a drive and everything was back to normal...
So I can repeat this very easily, every time I hit deep water I get the same 4k wall. Then all I have to do is shut off the truck, restart and everything is back to normal.
No codes ever.
Any ideas??
Moisture sensing?
Abuse prevention??
Maybe the tansmission harness has a short making the computer think it's in nuteral.
Re: Truck will not go over 4,000 RPM.
Posted: Wed Aug 19, 2015 12:39 am
by Ducky's Dad
Probably some sort of abuse prevention rev limiter kicking in. My '05 would only touch 3900-4000rpm when revved in neutral and it was obviously bouncing off a rev limiter, but would easily go above 4000rpm when driving in any gear (auto). When I installed the 87 econo tune recently with my Edge Evolution programmer, the engine will now rev to 5000rpm in neutral.
Re: Truck will not go over 4,000 RPM.
Posted: Wed Aug 19, 2015 9:41 am
by verdesardog
hehe what's wrong with those numbers? the engine in my truck REDLINES at 3200rpm.
Re: Truck will not go over 4,000 RPM.
Posted: Wed Aug 19, 2015 1:24 pm
by Ducky's Dad
the engine in my truck REDLINES at 3200rpm.
I had a '39 Chevy like that, about the same color as your truck.
Re: Truck will not go over 4,000 RPM.
Posted: Sun Jul 24, 2016 5:57 pm
by RotorWolf
Bump, same thing except I was in 2 wheel drive and the rpms were limited to 5 k.
Anyone have any ideas??
Re: Truck will not go over 4,000 RPM.
Posted: Sun Jul 24, 2016 7:33 pm
by coder
I'm not sure which motor you have but something is definitely wrong based on the factory horsepower and torque ratings nothing should be stopping at 4,000 rpms.
[Hemi 5.7]
Horsepower 345 @ 5,600 rpm
Torque 375 @ 4,400 rpm
[Hemi 6.4]
Horsepower 410 @ 5,600 rpm
Torque 429 @ 4,400 rpm
Re: Truck will not go over 4,000 RPM.
Posted: Sun Jul 24, 2016 7:46 pm
by nts007
Traction control??
Re: Truck will not go over 4,000 RPM.
Posted: Sun Jul 24, 2016 11:27 pm
by waldo
nts007 wrote:Traction control??
Sounds possible.
Re: Truck will not go over 4,000 RPM.
Posted: Mon Jul 25, 2016 9:40 pm
by laramieskibum
waldo wrote:nts007 wrote:Traction control??
Sounds possible.
Good thought. Happens to me. Do te early 3Gs have it?
Re: Truck will not go over 4,000 RPM.
Posted: Mon Jul 25, 2016 10:13 pm
by waldo
laramieskibum wrote:waldo wrote:nts007 wrote:Traction control??
Sounds possible.
Good thought. Happens to me. Do te early 3Gs have it?
My 07 doesn't.
Re: Truck will not go over 4,000 RPM.
Posted: Mon Jul 25, 2016 10:27 pm
by MSCH2112
here's some reading info below. and yeah, it's the traction control thing.
http://forum.powerwagonregistry.org/vie ... on+control
FYI, regarding snowsled's comments, he's old school and hate's electronics. the addition of an am/fm radio even sends him over the edge.
mike
Re: Truck will not go over 4,000 RPM.
Posted: Mon Jul 25, 2016 11:31 pm
by RustyPW
MSCH2112 wrote:here's some reading info below. and yeah, it's the traction control thing.
http://forum.powerwagonregistry.org/vie ... on+control
FYI, regarding snowsled's comments, he's old school and hate's electronics. the addition of an am/fm radio even sends him over the edge.
mike
