danbaldy

I new about the shudder on decel after agressive use on the upper levels when I bought the box, which I don't have a problem with. My problem is trying to keep a steady speed of 70-75mph. To be honest it also occurs level 5 on up but gets really bad at level 7-9.You can't even drive on the upper levels(7-9). I don't know if your so light on the throttle that the TPS is playing with the fueling. I tried to do a search on this but couldn't find anything. I didn't now if anybody else has experienced this that have the same box. Just after some ideas. Thanks

Push Rod

[quote author=danbaldy link=board=7;threadid=11330;start=15#109528 date=1046312281]
My problem is trying to keep a steady speed of 70-75mph. To be honest it also occurs level 5 on up but gets really bad at level 7-9.You can't even drive on the upper levels(7-9).
[/quote]

:-[ Sorry, Dan, I completely missed the part about normal driving. In this case I'd have a peak at fuel pressures, and as Justin suggested, have a peak at the tranny. You may also not have a good enough connection at the injector pump wire. I've seen a bad connection work ok at lower levels, but not at higher ones. Did you use a Scotchlock, or one of TST's Grabbers?

As far as the box goes, this is not normal behaviour for that box, so there is definitely an issue somewhere...

[edit] I just had another thought. I've got another customer (running a DD box) who has a bucking problem at highway speeds. We're currently checking out his APP sensor to see if this may be causing some trouble. When the truck bucks, does it throw out belches of smoke? If it is smoking bad during the buck, it could also be an injector pump :'(

Rod

BigBlue

Mine throws smoke out when it bucks. Hope it's not the injector pump. :'(

danbaldy

Rod, I used the scothlock on the pump wire. I purchased the grabber but had second thoughts about using it. The scotchlock looked like it would make a better connection. As far as blowing smoke out of the exhaut,I've never paid any attention. But I will. Thanks Dan

Push Rod

[quote author=danbaldy link=board=7;threadid=11330;start=15#109950 date=1046399066]<br>I used the scothlock on the pump wire. I purchased the grabber but had second thoughts about using it. The scotchlock looked like it would make a better connection.<br>[/quote]<br><br>If you can easily repair the damage to the pump wire done by the scotchlock (a little solder, and shrink tube does wonders), I'd pop that thing off of there and use the grabber. I know the grabber doesn't look like it does much for connection, but I've never seen a single one fail. Scotchlocks don't fail often, but they do give grief occasionally.<br><br>Rod

danbaldy

Rod, I thought I would fill you in on what has happened with my problem. I took the box off and installed it on another truck. Guess what. It ran perfect. So evidently my problem is with the truck itself. So here is what happened, I sold the truck. So I never did figure out what the cause was. I now own a 2003 3500 srw eth 48re longbed. I thank you for all your help! Of course I will bomb it too. As soon as Mark gets his box ready. O by the way the truck that I put the box on, liked it so well he bought it. Thanks Dan

BigBlue

Well, there's one way to fix the problem.

Push Rod

[quote author=danbaldy link=board=7;threadid=11330;start=15#121694 date=1048903073]<br>and installed it on another truck. Guess what. It ran perfect. [/quote]<br><br> What a great way to solve a problem.<br><br>Just out of curiosity, the new truck you installed it on, was it an HO? The PM3 Comp does virtually nothing (in leve 7 - 9) on an HO equipped truck, except boost bottom end fueling, as the HO's VP44 just can't deliver anymore. As such, the Competition shudder doesn't exist on the HOs, just SOs.<br><br>Rod

Scotty

Doesn't it mention the APPS in the troubleshooting on the install instructions?<br>I recall reading a few possible problems like this.<br><br>So far I do not get the nasty stutter, I get a bit of a stumble off of hard throttle [level 9] but that is covered up by the bark of the B1KS.<br><br> <br><br>I think the solution of selling the truck worked out well.<br>LOL<br><br>

Push Rod

[quote author=Scotty link=board=7;threadid=11330;start=15#121935 date=1048981937]<br>Doesn't it mention the APPS in the troubleshooting on the install instructions?<br><br>So far I do not get the nasty stutter, I get a bit of a stumble off of hard throttle [level 9] but that is covered up by the bark of the B1KS.<br>[/quote]<br><br>I don't remember reading it, and you got the install instructions there :'(<br><br>On the stumble side, according to what TST has told me, an ETC equipped truck in levels 7 - 9 fuels very early, and very hard. When you get off the throttle, the defuel situation is also very hard. Since the ETC pump is working like a devil, and then cuts fuel, it causes a stumble. Sort of stalls out the pump I spose. The ETH pump isn't fueling as hard, so when you get off the throttle, the stumble doesn't occur or is very slight.<br><br>Bark the VP44? ;D<br><br>Rod

Scotty

[quote author=Push Rod link=board=7;threadid=11330;start=15#122043 date=1049011222]
[quote author=Scotty link=board=7;threadid=11330;start=15#121935 date=1048981937]
Doesn't it mention the APPS in the troubleshooting on the install instructions?

So far I do not get the nasty stutter, I get a bit of a stumble off of hard throttle [level 9] but that is covered up by the bark of the B1KS.
[/quote]

I don't remember reading it, and you got the install instructions there :'(

On the stumble side, according to what TST has told me, an ETC equipped truck in levels 7 - 9 fuels very early, and very hard. When you get off the throttle, the defuel situation is also very hard. Since the ETC pump is working like a devil, and then cuts fuel, it causes a stumble. Sort of stalls out the pump I spose. The ETH pump isn't fueling as hard, so when you get off the throttle, the stumble doesn't occur or is very slight.

Bark the VP44? ;D

Rod
[/quote]

Read my post again Sheep boy...that is covered up by the bark of the B1KS.

:

danbaldy

Rod, The truck that I installed the kit on was an ETC motor. I didn't really sell the truck to get rid of the problem. It just worked out that way. I had someone wanting the kit, and somebody else wanting my truck. So I bit the bullet and did it. I just hope I didn't make a mistake. Now I get to do it all over again. Bombing that is. Any suggestions. Thanks Dan