Rough Start, Runs Fine
Thread Starter
|
Senior User
Joined: Aug 2012
Posts: 124
Likes: 0
Rough Start, Runs Fine
I've finally crossed out the fuel system as the culprit for the issue at large. After resealing the fuel bowl, my 97 F350 OBS STILL starts rough. It takes a longer time to turn over, and when it does, it sounds like it's misfiring really bad at first, then brings itself to a normal purr. Starter is a year old, and checked out good, fuel system is clean all the way to the heads. What else am I looking for?
Junior User
Joined: Jan 2008
Posts: 77
Likes: 0
The dash GP light goes out and the alt gauge goes up at the same time so I am pretty sure that GP are not staying on. Have used both Ford and aftermarket glow plugs with the same result.
Trending Topics
Lead Driver
Joined: Apr 2016
Posts: 7,188
Likes: 1,338
From: Bahstun
jump the GPR for 30 seconds and then start it, if it starts easier then you may have PCM issue
if using block heater and start nice then there is a issue with controlling GPR
if using block heater and start nice then there is a issue with controlling GPR
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
Crank it then let the gp's turn off and check the GPR with a meter to see if voltage is still passing through
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
Both of these are signs of a bad GPR. Not a pcm issue
Junior User
Joined: Jan 2008
Posts: 77
Likes: 0
Plugging in the block heater for a few hours is how I start it now. After a few hours it starts right up and is good for the day. Truck is not a daily driver but still it would be nice to fix this problem.
Thanks for the help, I will check the GPR
Thanks for the help, I will check the GPR
Junior User
Joined: Jan 2008
Posts: 77
Likes: 0
Thanks for that. I googled and found the Stancor relay. 586-902 part # I believe. Should be better as it is a much larger relay. Ordering that upgrade today.
Thread
Thread Starter
Forum
Replies
Last Post
Mike Hannahs
1994.5 - 1997 7.3L Power Stroke Diesel
29
Oct 9, 2013 08:16 PM
Opossum
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
5
Oct 17, 2012 12:18 PM
tazmania18235
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
20
May 4, 2004 06:44 PM