460 Lean engine codes - Stammers from stop
Thread Starter
|
Tuned
Joined: Apr 2003
Posts: 351
Likes: 1
From: Davis County, UT
460 Lean engine codes - Stammers from stop
I am in the midst of troubleshooting the old Ford. When on the rear tank I occasionally get lean trouble codes. The truck runs slightly worse on the rear tank. From a stop I have to give it more gas to get it going than I used too. Within the last 1200 miles, I have replaced both Fuel Pumps with Airtex brands. I have changed the fuel pressure regulator, and I ran a OTC Fuel Injection Cleaner through the injectors along with the Decarbonizer treatment.
Yesterday I was checking fuel pump pressures. The only thing I am within spec is WOT (Vaccum Plugged on Fuel Pressure Reg), there I am running 35psi. Engine Off I am running 32 PSI (spec 35 - 45 PSI), Engine On I am running 28 PSI (spec 30 - 45psi). These readings are on both pumps, I could find no fault to the rear pump. This tells me I either have a vaccum problem or a bad fuel pressure regulator. I wished someone made an adjustable fuel pressure regulator for this application. The condition of the Engine is good, I have 160psi in every hole. Truck has had a recent tune-up (plugs, cap, rotor, fuel filter, cleaned the K&N)
Yesterday I was checking fuel pump pressures. The only thing I am within spec is WOT (Vaccum Plugged on Fuel Pressure Reg), there I am running 35psi. Engine Off I am running 32 PSI (spec 35 - 45 PSI), Engine On I am running 28 PSI (spec 30 - 45psi). These readings are on both pumps, I could find no fault to the rear pump. This tells me I either have a vaccum problem or a bad fuel pressure regulator. I wished someone made an adjustable fuel pressure regulator for this application. The condition of the Engine is good, I have 160psi in every hole. Truck has had a recent tune-up (plugs, cap, rotor, fuel filter, cleaned the K&N)
Elder User
Joined: Feb 2008
Posts: 797
Likes: 1
From: ohio
Im sure that u could get an adjustable regulator for it. The regulator controls the fuel pressure and since its the same on both tanks id just grab up a new regulator and be done. By the looks of things the adjustable mustang regulator should fit ur truck, 302 and 460 show same part number on autozone website and i have an adjustable reg on my truck
Thread Starter
|
Tuned
Joined: Apr 2003
Posts: 351
Likes: 1
From: Davis County, UT
Im sure that u could get an adjustable regulator for it. The regulator controls the fuel pressure and since its the same on both tanks id just grab up a new regulator and be done. By the looks of things the adjustable mustang regulator should fit ur truck, 302 and 460 show same part number on autozone website and i have an adjustable reg on my truck
Posting Guru
Joined: Apr 2008
Posts: 1,532
Likes: 1
From: Wendover, NV.
OK, I am digging up this thread because I have a similar problem. I ordered the 5.0 fuel pressure regulator and am about to send it back to Summit Racing. There is no way it is going to fit my 460. What year 460's are you guys running? Mine is a '96.
Posting Guru
Joined: Apr 2008
Posts: 1,532
Likes: 1
From: Wendover, NV.
Thanks for the info. I figured that might have been my problem. I was looking at my invoice and I had ordered for the '86-'94 mustang by accident
Thought I would double check first just to be sure. Time to send this one back and get another.
Thanks again
Thought I would double check first just to be sure. Time to send this one back and get another.Thanks again
Thread
Thread Starter
Forum
Replies
Last Post
Gunnerboy
1987 - 1996 F150 & Larger F-Series Trucks
2
Aug 16, 2016 05:56 PM
johnvirgil
1987 - 1996 F150 & Larger F-Series Trucks
30
Dec 7, 2015 04:52 PM
