Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > The Entrance Gate- Welcome to Competition Diesel > Site Announcements
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Reply
 
Thread Tools
Old 05-21-2017, 01:18 PM   #1
12owner12v
 
12owner12v's Avatar

Name: 12owner12v
Title: Rookie
Status: Not Here
Join Date: Nov 2016
Member`s Gallery
Posts: 10
97 wont start when warm

hey guys I got a 97 12 valve 100% stock. Just recently when the truck gets up to operating temp it doesn't want to start back up. If I floor the pedal it'll start, rev to about 2000 rpms, then slowly die down and shut off even if I keep it floored. I know that this is a sign for when a vp44 goes bad but is it the same for a ppump? Really hoping its just the lift pump going bad. Thanks in advance!
__________________
Scott
95 sclb, s366, 5x16s, 7mm DVs, lifted 6in, 13.00@105
97 eclb, v10 gasser pull truck,
  Reply With Quote
Old 05-21-2017, 01:29 PM   #2
95cummins5.9
 
95cummins5.9's Avatar

Name: 95cummins5.9
Title: You are what you eat.
Status: Not Here
Join Date: Jun 2012
Location: Knox County, IL
Member`s Gallery
Posts: 3,495
Sound like the shutoff solenoid. Verify it is holding in the up position when it does this. Could possibly be a air leak somewhere in the fuel system also

Last edited by 95cummins5.9; 05-21-2017 at 01:30 PM.
  Reply With Quote
Old 05-21-2017, 08:15 PM   #3
12owner12v
 
12owner12v's Avatar

Name: 12owner12v
Title: Rookie
Status: Not Here
Join Date: Nov 2016
Member`s Gallery
Posts: 10
I'll check out the shut off solenoid. Before all this happened the truck would take a little while to start unless I touched the throttle a little bit. I've only had the truck for about 8 months and it's done it the whole. I was thinking maybe it could be a lift pump or air getting in the system?
__________________
Scott
95 sclb, s366, 5x16s, 7mm DVs, lifted 6in, 13.00@105
97 eclb, v10 gasser pull truck,
  Reply With Quote
Old 05-21-2017, 08:44 PM   #4
95cummins5.9
 
95cummins5.9's Avatar

Name: 95cummins5.9
Title: You are what you eat.
Status: Not Here
Join Date: Jun 2012
Location: Knox County, IL
Member`s Gallery
Posts: 3,495
Very possible. Overflow valve could be worn out also. The suction line from the tank to the pre screen and fuel heater is common too.
  Reply With Quote
Old 05-21-2017, 10:24 PM   #5
12owner12v
 
12owner12v's Avatar

Name: 12owner12v
Title: Rookie
Status: Not Here
Join Date: Nov 2016
Member`s Gallery
Posts: 10
What do you think the odds are it being the injection pump?
__________________
Scott
95 sclb, s366, 5x16s, 7mm DVs, lifted 6in, 13.00@105
97 eclb, v10 gasser pull truck,
  Reply With Quote
Old 05-22-2017, 06:09 AM   #6
95cummins5.9
 
95cummins5.9's Avatar

Name: 95cummins5.9
Title: You are what you eat.
Status: Not Here
Join Date: Jun 2012
Location: Knox County, IL
Member`s Gallery
Posts: 3,495
Slim to none.
  Reply With Quote
Old 05-22-2017, 08:35 AM   #7
Got Smoke?
 
Got Smoke?'s Avatar

Name: Got Smoke?
Title: Too Much Time
Status: Not Here
Join Date: Oct 2006
Location: Bethpage,TN
Member`s Gallery
Posts: 4,556
Overflow valve get a fixed orifice one from Tork Tek and never have that problem again!
__________________
Mark
2007 2500 Mega 68RFE FirePunk EFI/CSP5 & TCM tuning, Edge CTS II, deleted.

1997 2500 12V... far from stock

2003 Jetta Wagon TDI 5spd, .205 nozzles, Stage 3 tune, Colt Stg 2 cam, PD150 intake, EGR/CAT delete, 17/22 Custom Turbo
  Reply With Quote
Old 05-22-2017, 09:39 AM   #8
CorneliusRox
 
CorneliusRox's Avatar

Name: CorneliusRox
Title: Seasoned Rookie
Status: Not Here
Join Date: Dec 2012
Location: Minneapolis, MN
Member`s Gallery
Posts: 3,109
You can take the overflow valve apart to verify it's damaged. You could even pull the spring apart a bit to try and revive a lazy spring.

The fuel heater typically leaks, I don't think it blocks fuel or anything like that. It could be sucking air and losing prime here. It's very easy to remove for a check. I haven't had mine on in years and I can still start my truck at -25F at 21deg timing.

The lift pump (fuel transfer pump) could be on it's way out. My first one lasted around 230,000 miles before it wouldn't supply pressure consistently. You could go to a Harbor Freight and buy a fuel pressure gauge for around $20 and there's a 10mm port off your fuel filter it'll plug into.

You should also check your fuel filter.

Usually when the ppump is on it's way out, it does act goofy when warm. Typically it's just a loss of power, and or little to no idle.
__________________
12V - Thumper
Corey - BSME
97 12V Michigan Rust Bucket
  Reply With Quote
Old 08-04-2017, 10:33 PM   #9
Gambler
 
Gambler's Avatar

Name: Gambler
Title: Diesel Enthusiast
Status: Not Here
Join Date: Dec 2011
Location: Jacksonville, Ar
Member`s Gallery
Posts: 246
Fuel shut off solenoid would be my bet and then the ofv from what you stated about 8months....
__________________
97 Dodge ECLB, 4x4
Bench Flowed 180-pump/ 375cc, Mack plug, 4gsk,
#60 springs, FASS 125@55psi, Colt Big Stick , II 62/s475, SD Man ,ARP studs, Fluid Damper, 5x.014 CPP and SB 3250
  Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:10 PM.

 


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2017, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com