7.3L problems
Thread Starter
|
Senior User
Joined: Jan 2012
Posts: 191
Likes: 0
7.3L problems
I dont really know a whole lot about diesel motors. I dont even own one. Are work truck on the other hand has a few problems. It seems to hesitate and cut out around 30mph and 65mph. Also the heat barely works. It seems to blow out the defrost a lttle but not out of the vents are blow hard at all. It's a newer model but im not 100% on the year. I heard my boss say that it was the last year of the 7.3 so that might help. Any help would be great. We changed the fuel filter on the top of the motor. Is there an inline one we should check out?
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
The last year of the 7.3 was 2003. As for the fuel filter, there is only one, on top.
I want to say you should check the CPS. Its on the front of the motor. It is often responsible for "cutting out"
I want to say you should check the CPS. Its on the front of the motor. It is often responsible for "cutting out"
Postmaster
Joined: Apr 2006
Posts: 3,524
Likes: 2
From: CA Bay Area
Starting with fuel filter and than tank strainers is probably in order.
The defrost only means you have vacuum leak and there is not enough vacuum power to direct it to other vents. If that is 4WD the common leak is at the hubs. Otherwise check the vacuum pump on passenger side inner fender.
The defrost only means you have vacuum leak and there is not enough vacuum power to direct it to other vents. If that is 4WD the common leak is at the hubs. Otherwise check the vacuum pump on passenger side inner fender.
Senior User
Joined: Feb 2004
Posts: 320
Likes: 0
From: Kansas City, MO
I'd pop over to the 7.3L forum and do about 2 weeks worth of reading. You'll wind up knowing way more about these motors than you ever thought you cared to learn. And you'll likely wind up being your boss's favorite employee if he relies on that truck at all.
Probably also worth trying to find someone local who has a copy of AutoEnginuity to check that thing out and see if there is something glaring wrong with it.
Probably also worth trying to find someone local who has a copy of AutoEnginuity to check that thing out and see if there is something glaring wrong with it.
New User
Joined: Oct 2011
Posts: 9
Likes: 0
With respect to the heat, I'd check the level of the fluid in the radiator first. Diesels normally run a lot hotter then gas and almost all my mid 90s F350s have warmer cabs with far less powerful air blowers when compared to a small car.
Postmaster
Joined: Apr 2006
Posts: 3,524
Likes: 2
From: CA Bay Area
I slept in my truck with 7.3 in -20F and even the whole engine/cabin have been very warm at evening from towing, in the middle of the night the idling engine temperature dropped to the bottom of the scale I was getting cold even in sleeping bag.
In cold weather that engine will never reach full operating temperatures unless you put some serious load on it.
Thread
Thread Starter
Forum
Replies
Last Post
midsouth
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
May 17, 2012 09:08 AM
stangclassic66
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
4
Nov 7, 2005 08:18 PM
