My "White Truck" build/project - Competition Diesel.Com

BramanteCummins · 05-03-2016, 07:14 PM

Hey guys, its been a LONG time but I'm finally back in a truck. Played with TDI and V8 audi a bit and got bored. Until I found this gem...

1998.5 with a supposedly 13mm pump, full cuts, 7x14 injectors, hamilton 188/220, 66 over 83, fass 200, studded, o-ring'd, cut pistons, marine head gasket.

Seller said "it runs till its warmed up then gets dead pedal and dies"

Went down, ran it till warm. nothing. over ¾ throttle it got choppy and rough but came down and idled smooth. Bought it.

Went to load it on the trailer and it finally dies. wouldn't start. pulled off clogged/collapsed air filter, fires right up. Idles rough takes some pedal to keep it running.

At the shop, fires right up runs great. a few shakedown passes later and it stalls. start with pedal, stalled. start it with ¾ throttle, fires up unwillingly, let it run at high rpm until its semi stable then slowly let rpm down until foot is off pedal.

another pass back the the bay and blew a boot... doh!

A few questions, is a 13mm pump the same as 12mm as far as timing it goes? (lift amount in correlation to degrees)
Opinions on what is going on with the pump. Seems like a funky gov to me. haven't gotten into it yet. maybe this weekend.

stubz616 · 05-03-2016, 07:23 PM

I assume fuel pressure is still good when the truck is acting up starting?

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97rada · 05-03-2016, 08:07 PM

Sounds a lot like fuel supply. Maybe tie the shut off back and check fuel pressure

BramanteCummins · 05-03-2016, 08:09 PM

Quote:

Originally Posted by stubz616

I assume fuel pressure is still good when the truck is acting up starting?

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Fuel pressure is good. Though it will draw pressure down to 25-30 from 45

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stubz616 · 05-03-2016, 08:11 PM

Quote:

Originally Posted by BramanteCummins

Fuel pressure is good. Though it will draw pressure down to 25-30 from 45

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I'm with 97Rada then. Tie the Solenoid up and see if it still acts up.

BramanteCummins · 05-03-2016, 08:12 PM

Quote:

Originally Posted by 97rada

Sounds a lot like fuel supply. Maybe tie the shut off back and check fuel pressure

Shut off solenoid is gone, converted to cable operated (going back to solenoid). Not sure if that answers that.

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97rada · 05-03-2016, 08:16 PM

Not the problem then. When does it draw down that hard? Sounds kinda like air to. I would hook up a line and fresh filter to shop fuel and run it

BramanteCummins · 05-03-2016, 08:21 PM

There is no filter at the moment, the old one was starting to invert.

Problem is it will do this after a WOT pass easiest. Otherwise it will take hours of idle time

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BramanteCummins · 05-03-2016, 08:23 PM

The fuel sensor is just after the pump/filter. I'll move it up to just before the injection pump

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*Big Blue24* · 05-03-2016, 10:17 PM

Sounds like it could be a bad injection pump with scored barrels/plungers.

I'd swap the pump out and see how the truck runs.

BramanteCummins · 05-03-2016, 10:25 PM

That's expensive

I was hoping to not have to rebuild. What's the going rate for redoing a 13mm...

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DDually · 05-03-2016, 11:43 PM

Quote:

Originally Posted by Big Blue24

Sounds like it could be a bad injection pump with scored barrels/plungers.

I'd swap the pump out and see how the truck runs.

Thats what i was thinking. Had a friends truck that acted that same way. Got a rebuilt and benched P7100 and it solved the problem.

56cummins · 05-04-2016, 01:23 AM

Maybe it has those fancy Chinese 13mm barrels off ebay.

jlibert · 05-04-2016, 03:13 AM

Is the fuel tank venting properly? Run it with the cap off.

jlbayes · 05-04-2016, 06:49 AM

Knew your name looked familiar. Sucks to hear you're having problems already.

R1raptor · 05-04-2016, 07:12 AM

The last time I had one with those exact symptoms it was a plunger in the pump hanging when it got hot. Swapping pumps fixed it.

*Snedge* · 05-04-2016, 07:12 AM

I'm going to have to agree with BigBlue.

Does the fuel pedal become harder to push when it acts up? If so... pump time.

*zfaylor* · 05-04-2016, 07:38 AM

Another vote for pump. Exact symptoms I have seen when the pump was the culprit. I think some put way too much faith in that oil line on the side of a P7100 and ignore fuel quality/pressure.

BramanteCummins · 05-04-2016, 08:17 AM

Quote:

Originally Posted by Snedge

I'm going to have to agree with BigBlue.

Does the fuel pedal become harder to push when it acts up? If so... pump time.

Not that I noticed, seems the same.

Thanks for the input, I'll see if my socket has enough spline left to pull the holders off for inspection.

What is everyone running for injectors/delivery valves nowadays? I know these are too big.

https://vimeo.com/165295074

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jlbayes · 05-04-2016, 09:54 AM

Quote:

Originally Posted by BramanteCummins

What is everyone running for injectors/delivery valves nowadays? I know these are too big.
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6x.018s and 024s

05-03-2016, 07:14 PM	#1
BramanteCummins Name: BramanteCummins Title: ADD maniac Status: Not Here Join Date: Nov 2012 Member`s Gallery Posts: 636	My "White Truck" build/project Hey guys, its been a LONG time but I'm finally back in a truck. Played with TDI and V8 audi a bit and got bored. Until I found this gem... 1998.5 with a supposedly 13mm pump, full cuts, 7x14 injectors, hamilton 188/220, 66 over 83, fass 200, studded, o-ring'd, cut pistons, marine head gasket. Seller said "it runs till its warmed up then gets dead pedal and dies" Went down, ran it till warm. nothing. over ¾ throttle it got choppy and rough but came down and idled smooth. Bought it. Went to load it on the trailer and it finally dies. wouldn't start. pulled off clogged/collapsed air filter, fires right up. Idles rough takes some pedal to keep it running. At the shop, fires right up runs great. a few shakedown passes later and it stalls. start with pedal, stalled. start it with ¾ throttle, fires up unwillingly, let it run at high rpm until its semi stable then slowly let rpm down until foot is off pedal. another pass back the the bay and blew a boot... doh! A few questions, is a 13mm pump the same as 12mm as far as timing it goes? (lift amount in correlation to degrees) Opinions on what is going on with the pump. Seems like a funky gov to me. haven't gotten into it yet. maybe this weekend. __________________ '94 12v 4x4 RCLG - no idea where this build is going anymore, too many WICKED COOL ideas.... GAME ON.

05-03-2016, 07:23 PM	#2
stubz616 Name: stubz616 Title: Too Much Time Status: Not Here Join Date: Oct 2008 Location: Brewster, MA Member`s Gallery Posts: 1,327	I assume fuel pressure is still good when the truck is acting up starting? Sent from my iPhone using Tapatalk __________________ 95 RCLB Farrell Diesel Stage 5 13mm pump,Hamilton Springs,Retainers,Pushrods,Fluidampr,Steed Speed,S467.7/soon to be S488 atmo,Full Billet Trans,DPC 4 disk TC,BD Pressure Loc,Haley Speed 5x.022s,Diesel Pros Custom Cam,O-Ringed,.010 over HG,A1000,Hellman sump,625 Studs, 30*

05-03-2016, 08:07 PM	#3
97rada Name: 97rada Title: Too Much Time Status: Not Here Join Date: Feb 2008 Member`s Gallery Posts: 5,410	Sounds a lot like fuel supply. Maybe tie the shut off back and check fuel pressure __________________ Austin tow truck- 14-3500 with tuning toy truck -94 rclb auto- 5.2x with a lot left. Shooting for 4s Any intelligent fool can make things bigger and more complex...it takes a touch of genius- and alot of courage to move in the opposite direction.

05-03-2016, 08:16 PM	#7
97rada Name: 97rada Title: Too Much Time Status: Not Here Join Date: Feb 2008 Member`s Gallery Posts: 5,410	Not the problem then. When does it draw down that hard? Sounds kinda like air to. I would hook up a line and fresh filter to shop fuel and run it __________________ Austin tow truck- 14-3500 with tuning toy truck -94 rclb auto- 5.2x with a lot left. Shooting for 4s Any intelligent fool can make things bigger and more complex...it takes a touch of genius- and alot of courage to move in the opposite direction.

05-03-2016, 08:21 PM	#8
BramanteCummins Name: BramanteCummins Title: ADD maniac Status: Not Here Join Date: Nov 2012 Member`s Gallery Posts: 636	There is no filter at the moment, the old one was starting to invert. Problem is it will do this after a WOT pass easiest. Otherwise it will take hours of idle time Sent from my iPhone using Tapatalk __________________ '94 12v 4x4 RCLG - no idea where this build is going anymore, too many WICKED COOL ideas.... GAME ON.

05-03-2016, 08:23 PM	#9
BramanteCummins Name: BramanteCummins Title: ADD maniac Status: Not Here Join Date: Nov 2012 Member`s Gallery Posts: 636	My "White Truck" build/project The fuel sensor is just after the pump/filter. I'll move it up to just before the injection pump Sent from my iPhone using Tapatalk __________________ '94 12v 4x4 RCLG - no idea where this build is going anymore, too many WICKED COOL ideas.... GAME ON.

05-03-2016, 10:17 PM	#10
Big Blue24 Name: Big Blue24 Title: Comp Diesel Sponsor Status: Not Here Join Date: Jan 2008 Location: Cedar City, UT Member`s Gallery Posts: 6,310	Sounds like it could be a bad injection pump with scored barrels/plungers. I'd swap the pump out and see how the truck runs. __________________ 95' 2wd Junker Drag Truck 1502 HP Fuel-Only 12mm P7100 Pump SXE 472 over GTX55 116mm OEM 12v Block

05-03-2016, 10:25 PM	#11
BramanteCummins Name: BramanteCummins Title: ADD maniac Status: Not Here Join Date: Nov 2012 Member`s Gallery Posts: 636	That's expensive I was hoping to not have to rebuild. What's the going rate for redoing a 13mm... Sent from my iPhone using Tapatalk __________________ '94 12v 4x4 RCLG - no idea where this build is going anymore, too many WICKED COOL ideas.... GAME ON.

05-04-2016, 01:23 AM	#13
56cummins Name: 56cummins Title: Too Much Time Status: Not Here Join Date: Mar 2014 Member`s Gallery Posts: 736	Maybe it has those fancy Chinese 13mm barrels off ebay. __________________ 95 cummins

05-04-2016, 03:13 AM	#14
jlibert Name: jlibert Title: Too Much Time Status: Not Here Join Date: Jun 2007 Location: CA Member`s Gallery Posts: 3,454	Is the fuel tank venting properly? Run it with the cap off. __________________ J.P. Libert https://instagram.com/jplibert/

05-04-2016, 06:49 AM	#15
jlbayes Name: jlbayes Title: Too Much Time Status: Not Here Join Date: Mar 2011 Location: michigan Member`s Gallery Posts: 2,399	Knew your name looked familiar. Sucks to hear you're having problems already. __________________ Jacob, 97 rclb

05-04-2016, 07:12 AM	#16
R1raptor Name: R1raptor Title: Diesel Enthusiast Status: Not Here Join Date: Nov 2011 Location: North florida Member`s Gallery Posts: 127	The last time I had one with those exact symptoms it was a plunger in the pump hanging when it got hot. Swapping pumps fixed it. __________________ 93 chevy 3500 : 215hp p-pump, 5sp, 19, afc tuned ,plate delete , 3.54 d80 , slipping clutch. 83 chevy 3500 : 215 hp p-pump,5sp,19,afc tuned,plate delete,rack plug, valair ceramic single,3.42 14b, Vintage air, in need of twins.

05-04-2016, 07:12 AM	#17
Snedge Name: Snedge Title: Comp Diesel Sponsor Status: Not Here Join Date: Sep 2006 Location: Western Pa. Member`s Gallery Posts: 18,859	I'm going to have to agree with BigBlue. Does the fuel pedal become harder to push when it acts up? If so... pump time.

05-04-2016, 07:38 AM	#18
zfaylor Name: zfaylor Title: Comp Diesel Sponsor Status: Not Here Join Date: Nov 2010 Location: P-TOWN!, Indiana Member`s Gallery Posts: 5,024	Another vote for pump. Exact symptoms I have seen when the pump was the culprit. I think some put way too much faith in that oil line on the side of a P7100 and ignore fuel quality/pressure. __________________ 2015 half ton heavy chevy 81 Fairmont LS project Many yard ornament projects... North American Turbo