Cold Start lope, why?
Thread Starter
|
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
Cold Start lope, why?
139k
Clean Oil
What are some things that will cause a lopey idle on cold start? If it sits overnight when its cold out (below 40F) - the next morning, it will crank over normally, and fire up with a VERY lopey idle. The lope will last about 10-15 seconds then idle normally. The idle doesn't 'smooth out', it just goes straight to normal idle.
I don't have a GP LED, but I can watch the voltage change (Aeroforce) when the relay disengages. And I wouldn't suspect the GPR because it fires right up - just doesn't idle smoothly.
Any thoughts?
Clean Oil
What are some things that will cause a lopey idle on cold start? If it sits overnight when its cold out (below 40F) - the next morning, it will crank over normally, and fire up with a VERY lopey idle. The lope will last about 10-15 seconds then idle normally. The idle doesn't 'smooth out', it just goes straight to normal idle.
I don't have a GP LED, but I can watch the voltage change (Aeroforce) when the relay disengages. And I wouldn't suspect the GPR because it fires right up - just doesn't idle smoothly.
Any thoughts?
Thread Starter
|
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
How do I explain this to my wife???
(This could go down a very different path out of context)
15-40 Rotella. Same as last year, with No Romps.
I haven't ohmed the GPs yet. Guess I should.
Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
Could be a glow plug issue. The glow plug relays go bad often. I installed a led light in my gage pod to be able to see if voltage is coming out of the relay, it doesn't tell you if the glow plugs are working only the relay. At least you will know if your relay fails.
Thread Starter
|
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
Update
I replaced the GPR with the AIH relay and it still romped. I then changed to 5/40 Delo synthetic and it hasn't romped once.
Senior User
Joined: May 2011
Posts: 454
Likes: 0
From: Portland, OR
Got close to twice the miles you do and old injectors are apparently a contributor.
Trending Topics
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Lead Driver
Joined: Jul 2003
Posts: 7,406
Likes: 52
From: Wheatland, Mo
I switched to Rotella T6 full synthetic and haven't had the romps since. My truck just went past 290K with the original sticks and still runs good. Complains a little if I start it without it being plugged in below 10 degrees but otherwise, no romps and runs smooth.
Thread
Thread Starter
Forum
Replies
Last Post
gungho351
1999 - 2003 7.3L Power Stroke Diesel
39
Feb 16, 2011 09:35 PM