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Dodge Competition and Performance General Dodge Competition and Performance Discussion |
04-16-2019, 06:20 PM
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#1
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Miss at an idle 12 valve
I’ve got a 12 valve that has a miss that is only at an idle. Once it’s warm and you’re driving the miss goes away. It doesn’t feel down on power and starts easy as well. It made 1157hp on the engine dyno on a stock bottom end 😬. I’ve narrowed it down to cylinder 3 I’ve moved injectors around, and it stays at cylinder 3. I did a leakdown test today to eliminate a valve issue. And that checked out good. Didn’t hear anything out of the exhaust or intake. And it would push the piston down after a few seconds. Checked the delivery valve and holder didn’t see anything abnormal either. Thanks for any help
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__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-16-2019, 07:11 PM
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#2
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Name: Rich dzl
Title: 12v guru
Status: Not Here
Join Date: Mar 2011
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Posts: 741
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Still running delivery valve gaskets ? Seen them blow
Last edited by Rich dzl; 04-16-2019 at 07:12 PM.
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04-16-2019, 07:26 PM
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#3
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Quote:
Originally Posted by Rich dzl
Still running delivery valve gaskets ? Seen them blow
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The o ring looked good to me when I pulled it off
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__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-16-2019, 07:46 PM
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#4
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Name: Rich dzl
Title: 12v guru
Status: Not Here
Join Date: Mar 2011
Member`s Gallery
Posts: 741
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Sealing washer some pump builders use a gasket between barrel and DV
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04-16-2019, 07:50 PM
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#5
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Quote:
Originally Posted by Rich dzl
Sealing washer some pump builders use a gasket between barrel and DV
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Gotcha ! I don’t believe Seth uses one. I’ll double check tomorrow
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__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-16-2019, 08:49 PM
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#6
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Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,396
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13mm pump?
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04-16-2019, 09:11 PM
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#7
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Name: Rich dzl
Title: 12v guru
Status: Not Here
Join Date: Mar 2011
Member`s Gallery
Posts: 741
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No Seth doesn't
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04-17-2019, 02:49 AM
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#8
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Quote:
Originally Posted by jasonc
13mm pump?
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Yes 13mm
Sent from my iPhone using Tapatalk
__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-17-2019, 07:44 PM
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#9
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Sooo after Messing with it some more today, cylinders 3 and 5 are dead at an idle. If I take it on the road and spool it up. The miss goes away.
Sent from my iPhone using Tapatalk
__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-17-2019, 08:43 PM
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#10
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Name: 95cummins5.9
Title: Old man ***** gossiper
Status: Not Here
Join Date: Jun 2012
Location: U.S.A
Member`s Gallery
Posts: 4,715
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Heads probably cracked.
__________________
Quote:
Originally Posted by jfaulkner
puzzy, tune it.
I don't own anything stock, from engines to boobies I've modded them all. Life is too short to live with mediocre chit.
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04-18-2019, 05:23 AM
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#11
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Name: CumminNotRunnin
Title: Internet Mechanic
Status: Not Here
Join Date: May 2007
Location: North West, NJ
Member`s Gallery
Posts: 1,090
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Quote:
Originally Posted by 95cummins5.9
Heads probably cracked.
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Yea I would do leak down test on holes while cold and pull valve train. Either cracked head or broken piston rings.
__________________
Got Er Cummin
"A business that makes nothing but money, is a poor business."
-Henry Ford
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04-18-2019, 06:57 AM
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#12
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Quote:
Originally Posted by CumminNotRunnin
Yea I would do leak down test on holes while cold and pull valve train. Either cracked head or broken piston rings.
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I’ll do that after work. There is no blowby tho
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__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-18-2019, 08:07 AM
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#13
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Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,396
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Mine has always had a chop to it I guess youd call it. Been that way ever since I went to a 13mm pump and high timing.
It kinda comes across as a skip at light throttle. But has been the exact same way from when I first installed the pump.
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04-18-2019, 08:21 AM
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#14
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Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,396
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Was it acting this way before that 1100hp dyno run?
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04-18-2019, 08:40 AM
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#15
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Name: DISTURBED
Title: YEA WE RIDE THE SHORT BUS
Status: Not Here
Join Date: Nov 2007
Location: Winchester, Va
Member`s Gallery
Posts: 6,417
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Do a compression check on it. It may have bent a rod and once warm there is enough heat in the cylinder to fire the fuel or pull the injectors and use a dial indicator in a good cylinder then the dead ones to make sure the piston is coming up all the way. Double check your valve lash also. Cold vs hot plays with tolerances
__________________
Thanks, Jeremy
01 CTD Retired sled puller, dedicated "Twin Turbo" tow rig
96 CTD "TOO" Disturbed 3.0 - Built by Disturbed Diesel Performance
96 CTD "The Sickness" 2.6/2.8- Built by Disturbed Diesel Performance
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04-18-2019, 11:33 AM
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#16
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Quote:
Originally Posted by jasonc
Was it acting this way before that 1100hp dyno run?
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It’s been making this power for the last 2 years. This miss is all new lol.
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__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-18-2019, 11:37 AM
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#17
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
|
Quote:
Originally Posted by DISTURBED
Do a compression check on it. It may have bent a rod and once warm there is enough heat in the cylinder to fire the fuel or pull the injectors and use a dial indicator in a good cylinder then the dead ones to make sure the piston is coming up all the way. Double check your valve lash also. Cold vs hot plays with tolerances
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I’ll check that out. Bent rods has been in the back of my head.
Sent from my iPhone using Tapatalk
__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-20-2019, 09:35 AM
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#18
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Checked valve lash again, it was checked out good, pulled the pushrods on cylinder 3, they’re straight, did another leakdown test, it was good. Checked compression, everything was within 20 psi of each other. But I used a cheap Harbor freight tester, and it was reading 180-200psi which seems awfully low. But the adapter in there needed a little grinding to get it to fit. I’m guessing maybe it’s not sealing all the way. Also talked to Seth about it being a pump issue, and he said to check the DV’s. They move freely and I didn’t notice anything out of the ordinary.
Sent from my iPhone using Tapatalk
__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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04-20-2019, 02:22 PM
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#19
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Name: Rich dzl
Title: 12v guru
Status: Not Here
Join Date: Mar 2011
Member`s Gallery
Posts: 741
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Pop test the injectors
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04-20-2019, 05:46 PM
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#20
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Name: kole32
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Location: Knox, IN
Member`s Gallery
Posts: 569
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Quote:
Originally Posted by Rich dzl
Pop test the injectors
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Taking em in Monday ! Thanks for the advice, it’s appreciated
Sent from my iPhone using Tapatalk
__________________
1993 w250, 215hp pump benched by Seth. 5ks. Hamilton valve springs, colt 181/218 cam, fire ringed head. Airdog 150 at 45psi torktek ofv 6x16 injectors, timing is roughly 30*. S366 soon to have a s475 with it.
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