Engine struggles to start when warm
Thread Starter
|
New User
Joined: Jan 2002
Posts: 19
Likes: 0
From: Brigham City USA
Engine struggles to start when warm
I have a 75 390.
I'm not talking about fuel or a carburetor issue. It has a hard time turning over. It struggles to turn over like there is no oil. The reason I'm thinking about oil is that after my truck warms up and I slow to an idle the oil gague drops off to nothing. I don't have any knocking noises but it runs rough until the oil pressure gauge comes back up.
Any thoughts?
I'm not talking about fuel or a carburetor issue. It has a hard time turning over. It struggles to turn over like there is no oil. The reason I'm thinking about oil is that after my truck warms up and I slow to an idle the oil gague drops off to nothing. I don't have any knocking noises but it runs rough until the oil pressure gauge comes back up.
Any thoughts?
New User
Joined: Jun 2003
Posts: 23
Likes: 0
From: michigan
If your motor struggles to turn over only after it is warm check if you have a good enough ground.I hade the same problem.
when its bucking touch the ground wire it might be hot if it is you have a bad ground
when its bucking touch the ground wire it might be hot if it is you have a bad ground
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Trending Topics
Fleet Mechanic
Joined: Sep 2002
Posts: 1,769
Likes: 7
From: Gretna ,LA.
It could be timing is too high,heat soak in the starter,i fixed a hot start problem on my 74 F100 by changing all the cables to the solenoid fr/battery and fr/solenoid to starter with larger cables.Also i had a starting problem once on one of my vehicles, and it turned out to be a film of oil between the starter and bellhousing causing it not to get a good ground.
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
Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 5
From: Jefferson, Iowa
Sounds like this is more of an oil problem. I would take the pan off and then clean the pickup screen, and if pressure is still low, try replacing the oil pump. Otherwise a low end rebuild might be needed.
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Check to make sure that the chassis ground strap is still hooked from the cab to the engine. It could be an unrelated problem with the gauge and maybe the ground for the ignition.
When does the pressure come back? When still idling or do you have to rev it up to regain pressure.
I am curious, because you should have some lifter noise if you have no pressure.
Have you checked the actual oil pressure with a mechanical gauge to see for sure what you have?
Jimmy
When does the pressure come back? When still idling or do you have to rev it up to regain pressure.
I am curious, because you should have some lifter noise if you have no pressure.
Have you checked the actual oil pressure with a mechanical gauge to see for sure what you have?
Jimmy
Thread
Thread Starter
Forum
Replies
Last Post
thesellout77
1987 - 1996 F150 & Larger F-Series Trucks
3
Mar 2, 2013 04:23 PM
jagarcia89
1987 - 1996 F150 & Larger F-Series Trucks
5
Aug 2, 2011 01:02 PM
crypticshredder
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
Nov 26, 2010 01:25 PM
brooklyn
1973 - 1979 F-100 & Larger F-Series Trucks
13
Jan 26, 2010 08:39 PM
