Did I make a mistake?
Thread Starter
|
Lead Driver
Joined: Jul 2011
Posts: 8,679
Likes: 191
From: On the Edge of the Desert
Originally Posted by Conanski
What fuel pressure do you have and does it hold after the engine is shut off? If you have some leaking injectors that would result in a very rich idle mixture.
Lead Driver
Joined: Apr 2002
Posts: 5,319
Likes: 1,244
Short article from motor trend on thermostats. They say that EFI engines run most efficiently at 195 degrees opening temp and above.
Carburetor vehicles are more efficient at 180 degrees opening temp.
https://www.motortrend.com/how-to/ho...r-classic-car/
Carburetor vehicles are more efficient at 180 degrees opening temp.
https://www.motortrend.com/how-to/ho...r-classic-car/
4wd Low
Joined: Aug 2018
Posts: 11
Likes: 0
From: Earth
Good point and pull the vacuum hose off of the fuel pressure regulator and look for fuel entering the vacuum line.
Thread Starter
|
Lead Driver
Joined: Jul 2011
Posts: 8,679
Likes: 191
From: On the Edge of the Desert
Swapped the 180 thermostat back to a 195 after figuring out that fuel maps don't begin to self-tune until the computer sees 185*. (Which it was barely touching with the 180 stat)
It does run better (and leaner) with the 195 thermostat. Operating temp has came back up to 200-205 as it was before the entire engine swap.
I'm still dealing with the falling/surging idle. But I'm hopeful that getting the EEC chipped will correct everything.
It does run better (and leaner) with the 195 thermostat. Operating temp has came back up to 200-205 as it was before the entire engine swap.
I'm still dealing with the falling/surging idle. But I'm hopeful that getting the EEC chipped will correct everything.
Thread
Thread Starter
Forum
Replies
Last Post
mooktank
1987 - 1996 F150 & Larger F-Series Trucks
5
Dec 1, 2004 10:02 AM
