460 running rich

Reply Subscribe

Thread Tools

Search this Thread

Apr 9, 2003 | 08:57 PM

sljim

Thread Starter

New User

Joined: Apr 2003

Posts: 7

Likes: 0

460 running rich

Have a 1990 E350 with 460 engine that runs realy rich won't idle and runs very rich and blows black smoke runs like the chock was fully closed if it had one ,undrivable changed o2 and map sensor checked air filter and tubes bo change am not getting any codes
Anyone with any ideas would be a help

Apr 9, 2003 | 09:43 PM

pfogle

Lead Driver

Joined: Feb 2003

Posts: 8,140

Likes: 4

From: Oak Harbor, OH

460 running rich

have you pulled the codes?

Apr 9, 2003 | 09:54 PM

c_rossman

Posting Guru

Joined: Mar 2003

Posts: 1,349

Likes: 3

From: Cloud USA

460 running rich

Pull the vacume hose off of the fuel pressure regulator. If there is gas in the line thats whats wrong. Replace the regulator and you would be good to go. I would go with an adjustable one, they are about the same price.

Apr 11, 2003 | 12:34 PM

sljim

Thread Starter

New User

Joined: Apr 2003

Posts: 7

Likes: 0

460 running rich

Checked the regulator hose no fuel checked the codes no codes getting a fuel pressure gauge tonight to see what the pressure is could be a stuck regulator let me know what you think if it is how do you disconnect the lines any ideas would be welcomed.

**edited capital letters.

Last edited by MustangGT221; Apr 11, 2003 at 07:48 PM.

Apr 11, 2003 | 03:01 PM

c_rossman

Posting Guru

Joined: Mar 2003

Posts: 1,349

Likes: 3

From: Cloud USA

460 running rich

Look on the passenger side fuel rail, There should be a shrader valve, looks like a tire valve. The pressure tester would hook up there. Check the vac. line to the Map sensor, if and doubt replace it. I had that happen to my thunderbird. an excessive fuel pressure would only cause rich condition at idle and wot. stock pumps can only produce about 60-70 max psi.