Fuel Injection Pump Replacement?

Moderator: Founder

Fuel Injection Pump Replacement?

Postby JMK3521 » 12 Dec 2011, 14:17

I have an M1165 that starts and runs fine, when running for awhile and then shut off the vehicle will not start back up. You have to wait a substancial amount of time until it will start back up again... does my injection pump need replacing?
JMK3521
Newb
Newb
 
Posts: 8
Joined: 11 Dec 2011, 23:41

Re: Fuel Injection Pump Replacement?

Postby WRECKERMAN » 12 Dec 2011, 14:55

I have an M1165 that starts and runs fine, when running for awhile and then shut off the vehicle will not start back up. You have to wait a substancial amount of time until it will start back up again... does my injection pump need replacing?



I have had a few trucks with those exact symptoms and it was the injection pump. Replace that bad boy.

I think the solenoid on top of the pump is malfunctioning. Like i said i have had some trucks do that and when the truck is shut off and the pump is hot/warm the truck will not start. Once the truck/Engine/pump cools off it will start and run fine. During my first deployment to OIF we were having to cool the pumps with water sometimes to get the trucks to start again. I am not sure exactly what the heat does to cause the pump not to work. Another cause may be the JP8. The trucks were designed to run on diesel. Diesel has lubrication in it which lubes the moving parts inside the pump. JP8 is a cleaner fuel without much lubrication and may cause the pumps to quite working properly. The 624k TRAM actually has a filter on it that adds lubricant to the fuel when using JP8 to avoid having the same issues. I am not telling you to do this with your trucks but more for general info. A little bit of dextron can be added to JP8 to give it some lubrication if ever needed.
WRECKERMAN
Site Founder
Site Founder
 
Posts: 120
Joined: 02 Jun 2010, 16:41

Re: Fuel Injection Pump Replacement?

Postby JMK3521 » 12 Dec 2011, 18:07

thank you for the advice. I'm sure i'll be requesting more in the future.
JMK3521
Newb
Newb
 
Posts: 8
Joined: 11 Dec 2011, 23:41

Re: Fuel Injection Pump Replacement?

Postby deving1007 » 15 Feb 2012, 08:47

There is a little ball in the injection pump that if the truck gets to hot that ball will swell and not let fuel go around it. That is why putting cool water on it will fix it temporarily but once it has swollen and cooled so many times it is to big so you have to replace the pump and send it in to be repaired.
deving1007
 
Posts: 4
Joined: 29 Nov 2011, 10:43

Re: Fuel Injection Pump Replacement?

Postby oldschool327 » 27 Jan 2016, 04:11

Gents,
This may help you all when having issues with hot starts.
Attachments
HMMWV HOT STARTS.docx
(14.57 KiB) Downloaded 81 times
oldschool327
Gear Wrench
Gear Wrench
 
Posts: 15
Joined: 13 Apr 2015, 21:28
Location: Quantico

Re: Fuel Injection Pump Replacement?

Postby SUPERMOD » 28 Jan 2016, 04:48

Thanks oldschool?
SuperMod
3521/0411/0916

"IF YOU DONT LIVE FOR SOMETHING, YOU DIE FOR NOTHING"
User avatar
SUPERMOD
Site Founder
Site Founder
 
Posts: 938
Joined: 02 Jun 2010, 16:33
Location: Camp Pendleton, Ca


Return to Fuel

Who is online

Users browsing this forum: feeduser and 1 guest

cron