Re-learn?
Thread Starter
|
New User
Joined: Nov 2009
Posts: 7
Likes: 0
Re-learn?
2003 4.6 running rough at idle and then was stalling. Checked and found the rubber elbow on the vacuum line from valve cover to back of intake was almost in half. Replaced the elbow and it runs fine in park but when I put it in drive with the air on, the RPM's drop to 500 and stalls occasionally. When I turn off the air it idles ok, but runs a little rough. My question is, since the elbow has probably been cracked for quite some time, does the computer need to re-learn the change?
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
I would reccomend you remove the IAC and spray clean it's inside making sure the slide valve moves.
At the same time remove the air hose off the throttle body and spray clean inside all around the throttle plate.
After reassembly, remove one battery cable for about 2 minutes then reconnect.
Start the motor 'cold', turn on the A/C, lights and fan.
Let run to fully warm then drive about 5 miles out and back.
Do several hot restarts.
This should relearn nearly all that is needed and be perfect starts providing there are no other faults.
Your problem now is the IAC is not reacting to the A/C load and bogs the motor down because it cannot add air to keep the idle stable at 750 rpm hot.
Good luck.
At the same time remove the air hose off the throttle body and spray clean inside all around the throttle plate.
After reassembly, remove one battery cable for about 2 minutes then reconnect.
Start the motor 'cold', turn on the A/C, lights and fan.
Let run to fully warm then drive about 5 miles out and back.
Do several hot restarts.
This should relearn nearly all that is needed and be perfect starts providing there are no other faults.
Your problem now is the IAC is not reacting to the A/C load and bogs the motor down because it cannot add air to keep the idle stable at 750 rpm hot.
Good luck.
Thread
Thread Starter
Forum
Replies
Last Post
Motoshrump
Explorer, Sport Trac, Mountaineer & Aviator
4
Apr 24, 2011 09:08 PM
