Author |
Topic: HO2S ?? one or two ?? (Read 1121 times) |
|
a11mcr
Junior Member
1995 Scorpio cosworth 24V ultima
Posts: 89
|
 |
HO2S ?? one or two ??
« on: Jan 8th, 2008, 10:37pm » |
 Quote  Modify
|
Hi all just lookig at the manuals on the main site (got some work planned for the weekend).
Now it says there are two HO2S sensors (front & rear) but mine only has the front is this right? 2.3 16V.
Hope someone can shed some light on this (hunting at idle and very low MPG).
Cheers
mark
|
|
 IP Logged |
|
|
|
Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
|
|
Re: HO2S ?? one or two ??
« Reply #1 on: Jan 8th, 2008, 11:52pm » |
Quote Modify
|
Yep, the 2.3 only has the one (pre-cat) sensor 
Have you had a scan done to see if there any fault codes ? 
|
|
IP Logged |
|
|
|
a11mcr
Junior Member
1995 Scorpio cosworth 24V ultima
Posts: 89
|
|
Re: HO2S ?? one or two ??
« Reply #2 on: Jan 9th, 2008, 9:14am » |
Quote Modify
|
Cheers.
No fault codes!
How can you get 23-24 MPG and mine gets 16-18MPG round town  even when i take my lead boots off 
Mark
|
|
IP Logged |
|
|
|
solarpanel
Full Member
I love YaBB 1G - SP1!
Posts: 551
|
|
Re: HO2S ?? one or two ??
« Reply #3 on: Jan 9th, 2008, 6:35pm » |
Quote Modify
|
dont beleive all you read,i could not get that out of my 2.0 manual in town,def not with 2.3 auto est either and my cossie 16 ish.
|
|
IP Logged |
|
|
|
ADroste
Full Member
S-Type 2.7D SE 2008 replaced Scorpio 2.3 Ult.1998
Posts: 598
|
|
Re: HO2S ?? one or two ??
« Reply #4 on: Jan 9th, 2008, 8:55pm » |
Quote Modify
|
on Jan 8th, 2008, 11:52pm, jonnycab wrote:| Yep, the 2.3 only has the one (pre-cat) sensor |
|
Not necessarily. Russian wiring diagrams say that there was a post-catalyst sensor before 4/97 in manual and auto 2.3 DOHC.
Regards
Armin
|
|
IP Logged |
|
|
|
Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
|
|
Re: HO2S ?? one or two ??
« Reply #5 on: Jan 10th, 2008, 1:28am » |
Quote Modify
|
on Jan 9th, 2008, 6:35pm, solarpanel wrote:| dont beleive all you read,i could not get that out of my 2.0 manual in town,def not with 2.3 auto est either and my cossie 16 ish. |
|
I'm not fibbing, honest
Update.......I've deleted what I wrote before, in favour of the following link, that proves that the 2.3 should be running at a much higher mpg that the late teens....
....http://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl?board=Advice;action=di splay;num=1199976164
|
|
IP Logged |
|
|
|
Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
|
|
Re: HO2S ?? one or two ??
« Reply #6 on: Jan 10th, 2008, 2:11am » |
Quote Modify
|
on Jan 9th, 2008, 8:55pm, ADroste wrote:
Not necessarily. Russian wiring diagrams say that there was a post-catalyst sensor before 4/97 in manual and auto 2.3 DOHC.
Regards
Armin
|
|
Maybe something got lost in translation somewhere along the line 
Are there any 96/early 97, 2.3 owners on here that can confirm the existance of a post-cat lambda on their vehicles ?
|
|
IP Logged |
|
|
|
Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
|
|
Re: HO2S ?? one or two ??
« Reply #8 on: Jan 10th, 2008, 7:56am » |
Quote Modify
|
My '97 2.3 has a blank plug screwed into the exhaust post cat & the socket for a sensor tucked up by the autobox.
I queried it with Trevor at fordpartsuk sometime ago & he said mine had never had one (checked against the VIN).
|
|
IP Logged |
ABS multiplug wheel sensor pins MK IV or MK 20
|
|
|
pete from Hull
Senior Member
Non Scorpio at the moment, but still interested...
Posts: 1365
|
|
Re: HO2S ?? one or two ??
« Reply #9 on: Jan 10th, 2008, 8:53am » |
Quote Modify
|
on Jan 10th, 2008, 7:56am, Tompion wrote:My '97 2.3 has a blank plug screwed into the exhaust post cat & the socket for a sensor tucked up by the autobox.
I queried it with Trevor at fordpartsuk sometime ago & he said mine had never had one (checked against the VIN).
|
|
Interesting, I believe mine's the same, 'S' Reg
I wonder if you fitted one it would be recognised and used by the ecu and also if it did, weather it would make any difference.... just a thought
pete
|
|
IP Logged |
Bring back fair wages.........
|
|
|
TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
|
|
Re: HO2S ?? one or two ??
« Reply #10 on: Jan 10th, 2008, 4:45pm » |
Quote Modify
|
Guys, excuse me if I'm miles off here but the second lambda is normally a 'cat efficiency sensor' and is a requirement of the OBD-II emissions regulations (I think came into force in 1996?), it has nothing to do with the running of the engine like the first (pre cat) one does. As the Scorp is regarded as a 'parts bin special', this might explain things
No mine didn't have one either and it was an July/August 1996 build, only the pre cat like Jonny's.
|
|
IP Logged |
Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
|
|
|
ADroste
Full Member
S-Type 2.7D SE 2008 replaced Scorpio 2.3 Ult.1998
Posts: 598
|
|
Re: HO2S ?? one or two ??
« Reply #11 on: Jan 11th, 2008, 3:35pm » |
Quote Modify
|
In minimum, it must have been intended to fit the post cat sensor as you can see here in figure 2 of picture 7. http://www.fordscorpio.co.uk/manual/exhaust/exhaustcat16v.pdf
Wiring diagrams (English as well as German) say two sensors in 2.3 DOHC manual "As of before 04/97", and in auto "Sensors before 04/96". So consequently only pre-cat sensor in 2.3 DOHC manual "as of 4/97" , but wondrously "As of 04/97 in auto. So, what was fitted between 4/96 and 4/97 in auto? Maybe only a print msitake.
Regards
Armin
|
|
IP Logged |
|
|
|
solarpanel
Full Member
I love YaBB 1G - SP1!
Posts: 551
|
|
Re: HO2S ?? one or two ??
« Reply #12 on: Jan 11th, 2008, 10:25pm » |
Quote Modify
|
my 95 2.0ltr has two sensors 97 est has one
|
|
IP Logged |
|
|
|
|
Home
Help
Search
Members
Login
Reply
Send Topic
Print