Author |
Message |
Rick Bowman Samba Member
Joined: July 03, 2014 Posts: 4 Location: VIRGINIA
|
Posted: Thu Jul 03, 2014 5:46 pm Post subject: Vanagon O2 sensor causes hesitation |
|
|
I have a 1990 Vanagon Carat that runs terrible, hesitates, loses power. I disconnected the O2 sensor and it runs like a top. Got a new sensor, and same problem. Runs fine disconnected. Suggestions?
On another topic, anyone have a right side rear body trim panel? Between the rear wheel and sliding door.
Thanks,
Rick |
|
Back to top |
|
|
geo_tonz Samba Member
Joined: August 01, 2012 Posts: 1472 Location: Courtenay, BC, CANADA
|
Posted: Fri Jul 04, 2014 12:59 am Post subject: Re: Vanagon O2 sensor causes hesitation |
|
|
Rick Bowman wrote: |
I have a 1990 Vanagon Carat that runs terrible, hesitates, loses power. I disconnected the O2 sensor and it runs like a top. Got a new sensor, and same problem. Runs fine disconnected. Suggestions?
On another topic, anyone have a right side rear body trim panel? Between the rear wheel and sliding door.
Thanks,
Rick |
CIP1 carries the panel. Look on Bens place website for a great pictorial on replacing it. _________________ ---------------------------------------------------
"Ron Burgundy": 1991 Vanagon Multivan (Weekender) 2.1L Auto - Driver/Camper |
|
Back to top |
|
|
morymob Samba Member
Joined: November 09, 2007 Posts: 4683 Location: east-tn
|
Posted: Fri Jul 04, 2014 4:34 am Post subject: |
|
|
Do a search, do a little reading & u will find all the details of testing oxy wire at the plug & to ecu, u have a meter??. |
|
Back to top |
|
|
Ahwahnee Samba Member
Joined: June 05, 2010 Posts: 9776 Location: Mt Lemmon, AZ
|
Posted: Fri Jul 04, 2014 5:01 am Post subject: |
|
|
This manual in particular should prove useful...
Digifant ProTraining Manual
With little more than a simple multimeter most such issues can be resolved.
Much better (quicker, cheaper) to perform a methodical systems check than throw new parts at the problem. |
|
Back to top |
|
|
Howesight Samba Member
Joined: July 02, 2008 Posts: 3262 Location: Vancouver, B.C.
|
Posted: Fri Jul 04, 2014 11:07 am Post subject: Re: Vanagon O2 sensor causes hesitation |
|
|
Rick Bowman wrote: |
I have a 1990 Vanagon Carat that runs terrible, hesitates, loses power. I disconnected the O2 sensor and it runs like a top. Got a new sensor, and same problem. Runs fine disconnected. Suggestions?
On another topic, anyone have a right side rear body trim panel? Between the rear wheel and sliding door.
Thanks,
Rick |
1. Show us pics of the O2 sensor connection, please. That will clarify a lot.
2. Does your exhaust system have any leaks in it at all? Note that the O2 sensor senses the presence/absence of oxygen relative to the ambient level of oxygen. Any leak in the exhaust system, especially a large one or one located near the O2 sensor, allows ambient oxygen into the exhaust system which then produces incorrect oxygen readings, which then causes the lambda system to add fuel to burn the "excess" oxygen. The exhaust system pulses produce wave action that literally sucks air in through any exhaust system leaks. _________________ '86 Syncro Westy SVX |
|
Back to top |
|
|
eeebee Samba Member
Joined: July 17, 2009 Posts: 429 Location: Tujunga
|
Posted: Fri Jul 04, 2014 11:13 am Post subject: |
|
|
When you unplug the O2 sensor, the ecu runs in open loop mode and ignores the input from the other sensors. Look into the protraining manual as mentioned above for the complete diagnostic procedure. _________________ Eric
1987 Vanagon Wolfsburg Special Edition
GoWesty 2.3
Democracy is the recurrent suspicion that more than half of the people are right more than half of the time. |
|
Back to top |
|
|
OldBlueSyncro Samba Member
Joined: April 24, 2018 Posts: 206 Location: British Columbia
|
Posted: Mon Jan 28, 2019 7:10 pm Post subject: Re: Vanagon O2 sensor causes hesitation |
|
|
Did you ever figure out the issue?
I'm having the same symptoms after wiring my O2 sensor back in and driving it for the first time with an O2 sensor. |
|
Back to top |
|
|
Rick Bowman Samba Member
Joined: July 03, 2014 Posts: 4 Location: VIRGINIA
|
Posted: Tue Jan 29, 2019 4:20 pm Post subject: Re: Vanagon O2 sensor causes hesitation |
|
|
Still driving without the O2 sensor. Need to check on it again. Might have an exhaust leak. Let me know what you find. |
|
Back to top |
|
|
|