Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-11-2007, 01:20 PM
jayr7864 jayr7864 is offline
New User
 
Join Date: Sep 2002
Location: N. Smithfield United Stat
Posts: 8
jayr7864 is starting off with a positive reputation.
Fuel Injector Pump 1990 7.3 Diesel

My engine started giving me some trouble a few weeks ago. Upon starting a warm engine, it would starve for fuel and run rough until I feathered the pedal and increased RPM's.

I also noticed on occasion while at highway speed a loss of fuel for a second or two.

Yesterday it started and died. Since then, starting is difficult.When I try to turn it over there is no smoke from the exhaust at first. Turning it over for a while increases the smoke from the exhaust until it starts and then dies like it is out of fuel again. I changed the fuel pump with no changes to running.

I can hear the solenoid in the fuel injector make and break contact as I remove and replace the connectors with the ignition in the on position.

I strongly suspect the fuel injector pump is gone and I am going to replace it.
Problem is I do not know which 7.3 liter diesel I have. It would appear tha there are 2 engines, a 166 HP and a 188 HP engine. The truck is not a high altitude or arctic version.

It is a 1990 F250 Diesel with auto and a/c, 4x4.
Vin is 1FTHX26M3LKA95702

Anyone have a clue which one I have?

Thanks,
Jason
Reply With Quote
  #2  
Old 08-11-2007, 02:46 PM
tjc transport's Avatar
tjc transport tjc transport is online now
Moderator
 
Join Date: Mar 2005
Location: Marlboro Mental Hospital
Posts: 32,307
tjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputation
look on the passenger side valve cover, behind the fuel filter. there is a tag with all the engine info on it.
__________________
Tom

rarely in life do you meet a person that will drop everything to help a stranger,
and give the shirt off his back to a friend.
Steve Price was that kind of person.
Godspeed "window licker", the short bus will never be the same with you gone.
Reply With Quote
  #3  
Old 08-11-2007, 03:13 PM
jayr7864 jayr7864 is offline
New User
 
Join Date: Sep 2002
Location: N. Smithfield United Stat
Posts: 8
jayr7864 is starting off with a positive reputation.
Thanks! How did I miss that? 185 it is!

Now tell me, where can I get the socket necessary to remove the multi point star drive on the oil fill cover in front of the pump? It looks to have 16 points rather than the usual 8 point star.

Thanks again,
Jason
Reply With Quote
  #4  
Old 08-11-2007, 03:28 PM
jayr7864 jayr7864 is offline
New User
 
Join Date: Sep 2002
Location: N. Smithfield United Stat
Posts: 8
jayr7864 is starting off with a positive reputation.
Duh! Nevermind.... standard 12 point 5/16 socket
Reply With Quote
  #5  
Old 08-11-2007, 05:11 PM
justin25taylor justin25taylor is offline
Junior User
 
Join Date: Nov 2004
Location: Taylor, TX
Posts: 81
justin25taylor is starting off with a positive reputation.
Check the injector return lines for leaks. Fuel leaking out or air going in.
Hate to see ya change a good pump.
pm me if you want me to walk you thorough it
Reply With Quote
  #6  
Old 08-11-2007, 05:33 PM
Linemo Linemo is offline
Senior User
 
Join Date: Nov 2002
Location: Mathews Virginia
Posts: 281
Linemo is starting off with a positive reputation.
my brother has a newer version of the 7.3 and his did the same thing and it was the CPS {camshaft position sensor } located on the front of the engine
Reply With Quote
  #7  
Old 08-11-2007, 06:36 PM
jayr7864 jayr7864 is offline
New User
 
Join Date: Sep 2002
Location: N. Smithfield United Stat
Posts: 8
jayr7864 is starting off with a positive reputation.
LOL.... too late. I pulled it out just a short time ago.
I spoke with a very knowledgeable mechanic about it and he too thought it was the pump.

I couldn't get the three nuts off and resorted to pulling the injection pump gear housing. Of course I messed up the location of the gear. Duh! I took a good look at the position before lifting it but I am uneasy about replacing it.

How bad did I screw this one up?????

Will it run at all if I'm off a tooth?
I assume if it does in fact run but runs poorly I can just loosen the cover and move it over one tooth (one way or the other)

I should have taken a picture of the position BEFORE even considering popping the cover. Ugh!!!!!!

Last edited by jayr7864; 08-11-2007 at 06:59 PM.
Reply With Quote
  #8  
Old 08-12-2007, 08:43 AM
justin25taylor justin25taylor is offline
Junior User
 
Join Date: Nov 2004
Location: Taylor, TX
Posts: 81
justin25taylor is starting off with a positive reputation.
It might run but not very well.
Did you get another pump?
I have a 92 7.3 that just threw a rod at 470,000 miles. It was without a doubt the best truck I have ever had.
Good luck and let us know the outcome.
Best,
Justin
Reply With Quote
  #9  
Old 08-12-2007, 09:52 AM
jayr7864 jayr7864 is offline
New User
 
Join Date: Sep 2002
Location: N. Smithfield United Stat
Posts: 8
jayr7864 is starting off with a positive reputation.
Pump is on order and by the looks of things, I might not need it.
I found it leaking fuel this morning and upon inspection I found a hole in the metal supply line feeding the fuel pump. It is leaking where the line runs over the axle.

I am beginning to think there was a pin hole there to begin with and that it was sucking air....

Last week, it was wet on the frame but I could not detect any smell. I and my mechanic both thought it was power steering fluid. I suspect now it was fuel and that the pump was sucking air....

Question now is, do I just go ahead and replace it anyway. I've already got it out of the truck and all....

Truck has 210,000 miles. Typically, how long do these injection pumps last?

BTW... I ordered the pump from AutoZone online for $300 delivered.
Reply With Quote
  #10  
Old 08-12-2007, 10:09 AM
justin25taylor justin25taylor is offline
Junior User
 
Join Date: Nov 2004
Location: Taylor, TX
Posts: 81
justin25taylor is starting off with a positive reputation.
In my experience the original pump will outlast several "remanufactured" ones. If you are commited to buy it I would hang onto it as a spare or sell it to a forum brother.
My truck had the original pump at 470k. I did repair a leak similar to yours and did the return lines a couple times. It ran perfect until the day it died.
I always used power service, 2cycle oil, or ATF with the fuel to lubricate the pump.
Keep the filter changed and that ruck will last a long, long time.
Remember to use the Wixcool or something in the coolant to stop cavitation.
I used 15W40 Rotella for many years then switched to Delvac by Mobil.

I believe you have the best truck ever made by anyone.
It may be a little weak in the towing dept. but just give it time and it will do whatever you ask of it. The other great thing is they dont overheat when pulling long grades. I have passed all kinds of other trucks sitting on the side of a 6% grade cooling off.

Good luck, and let us know the outcome. If I can help on or off board let me know. I have been through lots of things having owned 4 of the Intl. Diesels.

Best,
Justin
Reply With Quote
  #11  
Old 08-12-2007, 11:21 AM
archangel archangel is offline
Posting Guru
 
Join Date: May 2003
Location: Joliet, Illinois
Posts: 1,236
archangel is starting off with a positive reputation.
The 5 "P's" Proper Prep Prevents Pennyless Pockets

Before you ever buy a pump you should check or replace all the fuel system related seals and flex fuel lines, check the metal lines, and if you can, have the injectors pressure tested before spending big$$$ on a new pump.

Injectors can be had for $17 online (but that's still $136 for all 8), but the pump is costly to swap out just to have it run no better.

__________________
Had to sell the Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
It had a verified 19 mpg city taking off slow as hell then shutting it down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors still on I got 24 mpg at 50 to 55 mph on the freeway empty!
Reply With Quote
  #12  
Old 08-12-2007, 01:57 PM
jayr7864 jayr7864 is offline
New User
 
Join Date: Sep 2002
Location: N. Smithfield United Stat
Posts: 8
jayr7864 is starting off with a positive reputation.
Update: It's running!

Decided to put it all back together. I repaired the fuel feed line and put the pump back in.
I had a heck of a time getting the timing back but in the end it's running strnger than ever before (weak fuel pump perhaps).

I emailed Autozone and tried to cancel the injector pump. It was still showing as being processed so hopefully, it won't ship. If it does, I may keep it or I may just refused delivery....

One thing I have noticed is that under hard acceleration I now have some smoke from the exhaust which I never had before. Then again, I have more power now too....
I think that in the 8 years I've owned this truck, it has been starving for fuel. It was lacking in the towing dept. but it was still manageable. I'm about out of fuel from the leaking overnight (there wasn't much in there to begin with) so trailering the boat for a test run will have to wait until later.

What do you all think of the presence of black smoke when I stomp on it now? Normal, timing still off a bit?

Thanks,
Jason
Reply With Quote
  #13  
Old 08-12-2007, 03:17 PM
tjc transport's Avatar
tjc transport tjc transport is online now
Moderator
 
Join Date: Mar 2005
Location: Marlboro Mental Hospital
Posts: 32,307
tjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputation
a little smoke when you stomp on it is normal with a non turbo engine. if it is allot of black smoke, the fuel may have been turned up to compensate for the fuel line sucking air.
__________________
Tom

rarely in life do you meet a person that will drop everything to help a stranger,
and give the shirt off his back to a friend.
Steve Price was that kind of person.
Godspeed "window licker", the short bus will never be the same with you gone.
Reply With Quote
  #14  
Old 08-12-2007, 10:03 PM
justin25taylor justin25taylor is offline
Junior User
 
Join Date: Nov 2004
Location: Taylor, TX
Posts: 81
justin25taylor is starting off with a positive reputation.
Black smoke looks cool
I agree with Tom a little smoke is normal.
Glad you got it fixed.
Reply With Quote
  #15  
Old 08-16-2007, 05:24 PM
jayr7864 jayr7864 is offline
New User
 
Join Date: Sep 2002
Location: N. Smithfield United Stat
Posts: 8
jayr7864 is starting off with a positive reputation.
Just posting to extend my gratitude for the help.
I managed to cancel the order for the injection pump and the truck is running better than it ever did.
My screwing with the timing had the benefit of getting it right on.
The truck starts in the blink of an eye now, has more power and is using less fuel.

I feel like one lucky guy.

Too bad the body on this truck is so bad. I feel like it could run forever now.

Thanks again,
Jason
Reply With Quote
Old 08-16-2007, 05:24 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

Tags
1990, 73, 90, diesal, diesel, ford, injector, picture, pump, sensor, test

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 07:46 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup