wierd timeing issue
Posting Guru
Joined: Jan 2012
Posts: 1,410
Likes: 1
From: Dallas, GA
For the EGR...there are so many different configurations that it's dificult to guess how yours was originally hooked up.
We may have asked this already but do you have the original emissions sticker on the top radiator support? That should show you how the EGR was originally plumbed and the best info.
We may have asked this already but do you have the original emissions sticker on the top radiator support? That should show you how the EGR was originally plumbed and the best info.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Anyway, I'll try to decipher it this time. I'm not familiar with the hot air tube on a six, but typically the hot air tube is a closed loop. It starts at the air cleaner or carb inlet, loops through the exhaust manifold, and then goes into the choke housing.
I don't know how your EGR is supposed to be connected, but the vacuum diagram on the radiator support should show that. As for checking it, you should be able to see the pintle on the EGR move when you hit it with full vacuum. And the engine won't like full EGR at idle so you can tell if it does move whether the passages are full of carbon or not.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Kevin - Sorry, but I STILL can't rep you! Guess I'm too stingy with my reps, so I'm going on a campaign to search and reward. That way I may be able to rep you next time - which probably won't be long in coming given your willingness to help. GOOD JOB!
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
A working EGR valve is connected to a series of VCVs - Vacuum Control Valves - that allow it to operate only when the engine is warmed up.
Here is one for reference, they come in multiple colors & nipple variants:
Older vehicles, the EGR was connected to only one such VCV with probably only one delay valve inline.
Look on the label under your hood on the radiator support to see the exact routing that came from the factory.
One way to see if it's working is to apply vacuum to it and watch it, you should be able to see the diaphragm open and close. This won't tell you if the insides are all carboned up or not but you can at least see if it's trying to open & close.
Here is one for reference, they come in multiple colors & nipple variants:
Older vehicles, the EGR was connected to only one such VCV with probably only one delay valve inline.
Look on the label under your hood on the radiator support to see the exact routing that came from the factory.
One way to see if it's working is to apply vacuum to it and watch it, you should be able to see the diaphragm open and close. This won't tell you if the insides are all carboned up or not but you can at least see if it's trying to open & close.
Thread Starter
|
Freshman User
Joined: Mar 2012
Posts: 36
Likes: 0
Ok guys got new stuff to check out. Tryed my fixes out this morning after truck sat all night. It started first first turn and stumbled onto its face. After the third try it stayed running.
As for the egr i will take some pictures and post them i have a feeling iam missing alot of stuff..... Thanks tons for all the help!!!
As for the egr i will take some pictures and post them i have a feeling iam missing alot of stuff..... Thanks tons for all the help!!!
Thread
Thread Starter
Forum
Replies
Last Post
Bluethunder3320
1987 - 1996 F150 & Larger F-Series Trucks
10
Dec 24, 2012 07:39 AM
mcastleberg
Electrical Systems/Wiring
8
Dec 10, 2003 10:58 PM
