Codes from my 89 351 W
Thread Starter
|
New User
Joined: Jun 2002
Posts: 7
Likes: 0
Codes from my 89 351 W
I pulled the codes from my 89 351 W Bronco and this is what I got:
Code 34: Thermactor
Code 44: EGR Valve
Code 77: No Idea
now all this is well and good, but I have no idea what to do from here, I'm having major idle and acceleration problems. Can anyone help.
Oh by the way, is there any way to clean a catalytic converter?
Thanks anybody that can help.
Mike
Code 34: Thermactor
Code 44: EGR Valve
Code 77: No Idea
now all this is well and good, but I have no idea what to do from here, I'm having major idle and acceleration problems. Can anyone help.
Oh by the way, is there any way to clean a catalytic converter?
Thanks anybody that can help.
Mike
Elder User
Joined: Jul 2001
Posts: 937
Likes: 0
Codes from my 89 351 W
[updated:LAST EDITED ON 23-Jun-02 AT 11:28 PM (EST)]LOL: 77 is operator error!
Thermactor: screw it, I removed all of mine but TTBOMK it doesn't have to work for the vehicle to operate normally (but you may fail emissions tests).
Your idle problem is almost surely the EGR. Looks like your code is for the EVP (EGR valve position sensor), so replace it.
So, ignore the two codes and fix the EGR code. See this link:
http://www.off-road.com/ford/bigbroncos/tech/eec/eec-iv.html
Thermactor: screw it, I removed all of mine but TTBOMK it doesn't have to work for the vehicle to operate normally (but you may fail emissions tests).
Your idle problem is almost surely the EGR. Looks like your code is for the EVP (EGR valve position sensor), so replace it.
So, ignore the two codes and fix the EGR code. See this link:
http://www.off-road.com/ford/bigbroncos/tech/eec/eec-iv.html
Junior User
Joined: May 2002
Posts: 95
Likes: 0
From: Riverside USA
Codes from my 89 351 W
None of those codes should produce major drivability issues. You got to get into it some more. You should run thermactor and egr. They are important to good drivability. Egr helps on pinging and thermactor is just putting oxygen in to help further burning in the exhaust. Not much to gain by leaving it off. If it is working wrong it may cause problems if it is blowing upstream across the hego when it should be downstream into the cat. The air on the hego makes the signal lean so the pcm gives more fuel thinking the engine is lean when it is really the air pump putting air where it doesn't belong. Thats why I would check out the codes but keep in mind that there is something else going on. Norm.
Elder User
Joined: Jul 2001
Posts: 937
Likes: 0
Codes from my 89 351 W
>If it is working wrong it may cause problems if it
>is blowing upstream across the hego when it should be
>downstream into the cat.
It pumps straight into the cat; how could it pump air upstream?
>is blowing upstream across the hego when it should be
>downstream into the cat.
It pumps straight into the cat; how could it pump air upstream?
Junior User
Joined: May 2002
Posts: 95
Likes: 0
From: Riverside USA
Codes from my 89 351 W
Most Ford systems have an air bypass valve and a air control valve. The bypass sends air either to the control valve or vents it. The control valve either sends it upstream into the heads through a crossover tube or downstream at the cat. I use the word most since there are many different calibrations and variations on where the air is injected. I smogged a 94 van Monday that was a 49 state vehicle and it only used an air bypass valve while a 94 calif. van would use both.
