Funny thing going on with motor

wade w · 05-05-2009, 08:58 PM

My truck has a kinda miss to it at a steady slower speed. Up around 70 it goes away. and it idles dead smooth. If you accell at all when it is doing it. It goes away as long as you are speeding up. Some times it doesnt do it at all ,but most of the time it does as long as I am going slow enough. Any ideas? Somebody told me it might be some funky named thing that had something to do with the EGR. Cant remember what he called it. I know its on the driverside of the blower with some vacuum lines and i think some wires going to it.

BTW I fixed the boost gauge. Had a broken fitting that was blocking the line to the gauge. Also the factory boost gauge is on crack. It goes to what would be at least 15 lbs. I got a big aftermaket gauge from somebody that I hooked up just temp. it was showing 12 to 12.75. That seems about right to me.

bgstew6 · 05-05-2009, 09:06 PM

that would be the DPFE

DolSVT00 · 05-05-2009, 09:16 PM

yup, cap off the vaccuum line that comes off of the top of the egr (black rusty flange flying saucer lookin thingy bolted to the plennum) then drive it around and see if it fixes it.

wade w · 05-05-2009, 10:04 PM

Cool. Thanks. If it does fix it? Then what?

DolSVT00 · 05-05-2009, 10:06 PM

Delete that SHAT!

wade w · 05-05-2009, 10:12 PM

Ya I would really like to, but I would have to get another tune for it. Money's funny right now.

bgstew6 · 05-05-2009, 10:41 PM

IF you got a predator turn it off in the tune yoruself

wade w · 05-05-2009, 10:45 PM

Na. I have a SCT.

DolSVT00 · 05-05-2009, 10:58 PM

Delete it anyway, it will throw a code but there's no adverse effects from it.

wade w · 05-08-2009, 08:00 AM

Quote:

Originally Posted by DolSVT00

Delete it anyway, it will throw a code but there's no adverse effects from it.

I did block the line. I seemed to fix it, but I havent really got to drive it much to make sure. If it does throw a code wont the CEL come on?

DolSVT00 · 05-08-2009, 10:32 PM

Quote:

Originally Posted by wade w

I did block the line. I seemed to fix it, but I havent really got to drive it much to make sure. If it does throw a code wont the CEL come on?

yup

05-05-2009, 08:58 PM	#1
wade w Senior Member Join Date: Aug 2007 Location: Savannah GA Posts: 1,725	Funny thing going on with motor My truck has a kinda miss to it at a steady slower speed. Up around 70 it goes away. and it idles dead smooth. If you accell at all when it is doing it. It goes away as long as you are speeding up. Some times it doesnt do it at all ,but most of the time it does as long as I am going slow enough. Any ideas? Somebody told me it might be some funky named thing that had something to do with the EGR. Cant remember what he called it. I know its on the driverside of the blower with some vacuum lines and i think some wires going to it. BTW I fixed the boost gauge. Had a broken fitting that was blocking the line to the gauge. Also the factory boost gauge is on crack. It goes to what would be at least 15 lbs. I got a big aftermaket gauge from somebody that I hooked up just temp. it was showing 12 to 12.75. That seems about right to me. __________________

05-05-2009, 09:06 PM	#2
bgstew6 Senior Member Join Date: Jan 2009 Location: Summerville, SC Posts: 444	that would be the DPFE __________________ 2k2 Black Harley Davidson SCrew, #1088 21lbs of Pure, Cogged, Kenne Bell Screamin Hell! Touched by the Hand of DolSVT "If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle." - Sun Tzu

05-05-2009, 10:04 PM	#4
wade w Senior Member Join Date: Aug 2007 Location: Savannah GA Posts: 1,725	Cool. Thanks. If it does fix it? Then what? __________________

05-05-2009, 10:12 PM	#6
wade w Senior Member Join Date: Aug 2007 Location: Savannah GA Posts: 1,725	Ya I would really like to, but I would have to get another tune for it. Money's funny right now. __________________

05-05-2009, 10:41 PM	#7
bgstew6 Senior Member Join Date: Jan 2009 Location: Summerville, SC Posts: 444	IF you got a predator turn it off in the tune yoruself __________________ 2k2 Black Harley Davidson SCrew, #1088 21lbs of Pure, Cogged, Kenne Bell Screamin Hell! Touched by the Hand of DolSVT "If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle." - Sun Tzu

05-05-2009, 09:16 PM	#3
DolSVT00 Moderator Join Date: Jan 2007 Location: Goose Creek Posts: 3,913	yup, cap off the vaccuum line that comes off of the top of the egr (black rusty flange flying saucer lookin thingy bolted to the plennum) then drive it around and see if it fixes it.

05-05-2009, 10:06 PM	#5
DolSVT00 Moderator Join Date: Jan 2007 Location: Goose Creek Posts: 3,913	Delete that SHAT!

05-05-2009, 10:45 PM	#8
wade w Senior Member Join Date: Aug 2007 Location: Savannah GA Posts: 1,725	Na. I have a SCT. __________________

05-05-2009, 10:58 PM	#9
DolSVT00 Moderator Join Date: Jan 2007 Location: Goose Creek Posts: 3,913	Delete it anyway, it will throw a code but there's no adverse effects from it.