Runs rough when cold
Thread Starter
|
New User
Joined: Dec 2006
Posts: 11
Likes: 0
Runs rough when cold
2002 7.3L F350. Mileage 200,000. In cold weather it runs rough till warmed up, then runs real good. Has new glow plugs, new fuel filter, new #2 & #4 fuel injectors. Starts up with no problem whether plugged in overnight or not.
If not plugged in, needs at least 10 minutes run time before it will get up enough power to creep forward.
As long as weather is warm or engine is not stone cold, it will start up and idle and drive off normally.
Here in TX weather is not bitterly cold but some nights get down to freezing on occasion. It doesn't have to be real cold for this problem to occur.
If not plugged in, needs at least 10 minutes run time before it will get up enough power to creep forward.
As long as weather is warm or engine is not stone cold, it will start up and idle and drive off normally.
Here in TX weather is not bitterly cold but some nights get down to freezing on occasion. It doesn't have to be real cold for this problem to occur.
Thread Starter
|
New User
Joined: Dec 2006
Posts: 11
Likes: 0
Originally Posted by Tenn01PSD350
How old are your batteries? Stock units? I assume the shop/dealer replaced the injectors? Why? Also is it still the stock Glow Plug Relay and Glow plugs? Does it smoke during startup?
Ford dealer replaced # 2 & 4 fuel injectors b/c was missing really bad. They said needed replacing. They said the # 8 had tested bad (?) one time but upon being retested twice more, was ok.
Glow plugs and relay were replaced 4 weeks ago by local diesel mechanic. They did show quite worn/burned.
No smoking upon start up.
Have put 1 quart transmission fluid into oil and another into fuel tank to supposedly help clean injectors.
Elder User
Joined: Dec 2005
Posts: 703
Likes: 1
From: Middle of a field CT
Trending Topics
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
I cant see line pressures being anywhere near 2000psi or greater, maybe one of our tranny guru's will chime in for us
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Cargo Master
Joined: Jan 2002
Posts: 2,079
Likes: 11
From: LA and CO
Damn, This sounds like my problem too. Please keep us informed of what problem is found. This sounds exactly like my problem.
House22 mentioned injector o-rings. Can you elaborate some more on that?
House22 mentioned injector o-rings. Can you elaborate some more on that?
Thread Starter
|
New User
Joined: Dec 2006
Posts: 11
Likes: 0
HPOP (High Pressure Oil Pump?)
It sounds like someone shakin a box of rocks. I have been faithful with my oil changes and other maintenance for the whole 205,000 miles I have on it.
A do it all fella who works on alot of diesel tractors told me he puts a quart of ATF in at every oil change and about every 3rd tank of fuel. Says he's been doing it forever.
He drives an older F350 with high mileage and has been doing this with his all along.
It sounds like someone shakin a box of rocks. I have been faithful with my oil changes and other maintenance for the whole 205,000 miles I have on it.
A do it all fella who works on alot of diesel tractors told me he puts a quart of ATF in at every oil change and about every 3rd tank of fuel. Says he's been doing it forever.
He drives an older F350 with high mileage and has been doing this with his all along.
Thread Starter
|
New User
Joined: Dec 2006
Posts: 11
Likes: 0
Sorry. I am not hearing the HPOP. When the truck is first started up the engine sounds awful if it has not been plugged in.
As long as it's been plugged in, you wouldn't know it has a problem.
It's just when it's cold and has not been plugged in that any of this is noticable.
I'll have to ask the fella about the HEUI injectors and HPOP in his truck and the tractors he works on. He knows what kind of truck I drive and the diesel mechanic who replaced the glow plugs put his blessing on the ATF in both oil and fuel.
It did not seem to affect the perf. of the truck but I have only added the ATF to the oil one time. I will be due for an oil chg. in another week and he is planning on adding it again then.
As long as it's been plugged in, you wouldn't know it has a problem.
It's just when it's cold and has not been plugged in that any of this is noticable.
I'll have to ask the fella about the HEUI injectors and HPOP in his truck and the tractors he works on. He knows what kind of truck I drive and the diesel mechanic who replaced the glow plugs put his blessing on the ATF in both oil and fuel.
It did not seem to affect the perf. of the truck but I have only added the ATF to the oil one time. I will be due for an oil chg. in another week and he is planning on adding it again then.