Fail safe Engine mode
#81
12-23-2013, 06:04 PM
Join Date: Oct 2009
Location: Perth Ontario Canada
Posts: 11,058
Received 2,255 Likes
on
1,840 Posts
What makes you think we speak English well enough to understand each other?
#82
12-23-2013, 06:16 PM
Join Date: Jan 2012
Location: Newport Beach, California
Posts: 5,574
Received 2,579 Likes
on
1,784 Posts
English is a most difficult language...
#83
12-23-2013, 06:28 PM
Join Date: Oct 2009
Location: Perth Ontario Canada
Posts: 11,058
Received 2,255 Likes
on
1,840 Posts
"England and America are two countries separated by a common language."George Bernard Shaw
Irish dramatist & socialist (1856 - 1950)
Canada is stuck midway between the two. We spell things properly like the UK, use the metric system like the continent and can almost understand most US accents and expressions. We do know that there's no such words as 'walla' and 'prolly'.
#84
12-23-2013, 06:31 PM
Join Date: Jan 2012
Location: Newport Beach, California
Posts: 5,574
Received 2,579 Likes
on
1,784 Posts
#85
12-23-2013, 07:15 PM
Join Date: Oct 2009
Location: Perth Ontario Canada
Posts: 11,058
Received 2,255 Likes
on
1,840 Posts
'Prolly' is used instead of 'probably'.
Example: I poured a gallon of Seafoam and Stabil in my gas tank and 'walla' I smoked out the entire neighbourhood. I prolly shouldn't do that again.
#86
12-23-2013, 07:24 PM
Join Date: Jan 2012
Location: Newport Beach, California
Posts: 5,574
Received 2,579 Likes
on
1,784 Posts
#87
12-23-2013, 09:18 PM
Senior Member
No shouting match here. I only suggested that people try it. i have no idea if it will work for some or not.. It worked for me and my car runs great now.. that is what's important to me. However if my experience can help one other person then that was my aim... some minimized my experience because they never heard of it before. And u r right.. i live in central florida so i can imagine that the fuel could be different here
When I see comments like "I cannot imagine any technical reason for insufficient octane setting the CEL and inducing failsafe", I recall Jaguar's S-type manual that warns of the possible damage that might result from using low-octane fuel, and that Jaguar would not be responsible for such damage. That technical reason is there in print, no imagination needed.
Of course, if you and your Jag could stand the strain, there is a way to be sure. Just switch back to 87 octane for a short time!
The following users liked this post:
DPK (12-26-2013)
#88
12-24-2013, 02:33 AM
Veteran Member
An oddity in this is that the MIL would not go off until at least 3 trips with the fault no longer present (it's the law). So if it went off soon after filling with different fuel it wasn't the new fuel that caused the MIL to go off.
The doesn't rule out bad fuel as a possible cause. Doesn't confirm it, either.
I don't think we're going to find the reason, but I do think the fault will reappear. Sorry, but thats what they usually do!
(The fault codes remain stored - despite MIL off - until 40 trips without the fault, unless cleared by an OBD tool or disconnecting the battery on cars where that clears codes.)
The doesn't rule out bad fuel as a possible cause. Doesn't confirm it, either.
I don't think we're going to find the reason, but I do think the fault will reappear. Sorry, but thats what they usually do!
(The fault codes remain stored - despite MIL off - until 40 trips without the fault, unless cleared by an OBD tool or disconnecting the battery on cars where that clears codes.)
#89
12-24-2013, 09:28 AM
Join Date: Oct 2009
Location: Perth Ontario Canada
Posts: 11,058
Received 2,255 Likes
on
1,840 Posts
Beema, you are not without support. Since no one knows why the X-types had the problem, it may be surprising but quite possible that the same thing could happen with your S-type.
When I see comments like "I cannot imagine any technical reason for insufficient octane setting the CEL and inducing failsafe", I recall Jaguar's S-type manual that warns of the possible damage that might result from using low-octane fuel, and that Jaguar would not be responsible for such damage. That technical reason is there in print, no imagination needed.
Of course, if you and your Jag could stand the strain, there is a way to be sure. Just switch back to 87 octane for a short time!
When I see comments like "I cannot imagine any technical reason for insufficient octane setting the CEL and inducing failsafe", I recall Jaguar's S-type manual that warns of the possible damage that might result from using low-octane fuel, and that Jaguar would not be responsible for such damage. That technical reason is there in print, no imagination needed.
Of course, if you and your Jag could stand the strain, there is a way to be sure. Just switch back to 87 octane for a short time!
As a footnote, there's no X-types that have reported engine damage from use of low octane fuel, just the appearance of the MIL in a few cases.
It would be nice too hear back from the OP as to where things stand, if we've not scared them off.
#90
12-24-2013, 03:11 PM
Beema-
I agree with the others about not starting a pi**ng match, especially at this time of year- but please don't drag out and rehash old tired myths that have been proven to be false time and time again.
-Cars built to run on regular will not run better on premium.
-Ethanol blended fuels do not 'burn faster' to any practical degree. Flame front speed has no bearing on detonation which is the sole purpose of using high octane fuel.
If the OP(s) are not already using 95RON/91AKI fuel then obviously it will do no harm to try this. It would be useful to hear their feedback one way or the other.
My point simply and solely is that your experience flies in the face of the wisdom accumulated here across virtually all models of Jag and engine variants with the sole exception of the X-type. For reasons that no one has yet explained, a small minority of owners of those cars have been able to link a failsafe/CEL to useage of low octane fuel. Some of this same group have also noted audible pinging (detonation) , reduced power and increased fuel consumption.
Being that yours is the first and ONLY data point that is similar to the X-type, I'm curious and a little skeptical. I have no doubt that what you relate is true- the light turned off after filling with high octane fuel, but is that a direct result or merely a coincidence? If it's a direct result, I would want to dig deeper into the technical explanation.
I agree with the others about not starting a pi**ng match, especially at this time of year- but please don't drag out and rehash old tired myths that have been proven to be false time and time again.
-Cars built to run on regular will not run better on premium.
-Ethanol blended fuels do not 'burn faster' to any practical degree. Flame front speed has no bearing on detonation which is the sole purpose of using high octane fuel.
If the OP(s) are not already using 95RON/91AKI fuel then obviously it will do no harm to try this. It would be useful to hear their feedback one way or the other.
My point simply and solely is that your experience flies in the face of the wisdom accumulated here across virtually all models of Jag and engine variants with the sole exception of the X-type. For reasons that no one has yet explained, a small minority of owners of those cars have been able to link a failsafe/CEL to useage of low octane fuel. Some of this same group have also noted audible pinging (detonation) , reduced power and increased fuel consumption.
Being that yours is the first and ONLY data point that is similar to the X-type, I'm curious and a little skeptical. I have no doubt that what you relate is true- the light turned off after filling with high octane fuel, but is that a direct result or merely a coincidence? If it's a direct result, I would want to dig deeper into the technical explanation.
Mikey,
sir i just have to ask why is it that you cant accept that i had a valid experience.. What is your aim sir ? what are you trying to prove ? what in the name of heaven would i gain by tellin all here that once i switched to hi octane gasoline in my 2000 s-type 4.0 that within 3 days of driving it that the fail safe engine mode ceased and the check engine light went off but prior to that for the entire 3 weeks that i owned the car it fail safed ? it seems like you wanna be right so bad that you keep on questioning my experience.. My car ran like crap and had me on the side of the road every time i turned a block untill i switched to premium fuel. I cant explain why nor can i explain that it flies in the face of YOUR KNOWLEDGE since you helped build the cars ...lol.. most of the posters here are seeing where im coming from but u wanna keep this thing going because like i said u built the cars and you know every single thing they do... my goal is to help.. you sir wanna divide.. i dont know how old you r but obviously u need to grow up . nobody knows everything but my experience was my experience.. not yours and the whole point of JAGUAR FORUMS is to inform, bring knowledge and for us to come together as jag owners.. not to divide
The following users liked this post:
DPK (12-26-2013)
#91
12-24-2013, 03:22 PM
Beema, you are not without support. Since no one knows why the X-types had the problem, it may be surprising but quite possible that the same thing could happen with your S-type.
When I see comments like "I cannot imagine any technical reason for insufficient octane setting the CEL and inducing failsafe", I recall Jaguar's S-type manual that warns of the possible damage that might result from using low-octane fuel, and that Jaguar would not be responsible for such damage. That technical reason is there in print, no imagination needed.
Of course, if you and your Jag could stand the strain, there is a way to be sure. Just switch back to 87 octane for a short time!
When I see comments like "I cannot imagine any technical reason for insufficient octane setting the CEL and inducing failsafe", I recall Jaguar's S-type manual that warns of the possible damage that might result from using low-octane fuel, and that Jaguar would not be responsible for such damage. That technical reason is there in print, no imagination needed.
Of course, if you and your Jag could stand the strain, there is a way to be sure. Just switch back to 87 octane for a short time!
#92
12-24-2013, 04:39 PM
Join Date: Oct 2009
Location: Perth Ontario Canada
Posts: 11,058
Received 2,255 Likes
on
1,840 Posts
#94
02-17-2015, 05:08 AM
#95
02-21-2015, 03:34 PM
Hi Kelsey, I feel I have to reply to your message. I am just getting back on the forum after 2 months away. To feedback my S-Type updates. I seen your post and have to share my experience. I wasted £800 with a jag specialist who appeared to temporarily sort out my 'safe/ limp mode' issue. Same errors you are getting. Only for problems to reappear 2 weeks later. After taking advice from my boss who told me to take the car to Jag immediately, after 10 weeks with specialist I did. My issue was a PCM-ABS module communications problem. Fortunately they did not have to replace any parts. They investigated and stripped out the ABS module/PCM harness and noticed a wiring problem. Probably a broken connection. It was fixed immediately by Jaguar and I was only charged £300 for the investigation. Admittedly you may have a different issue (im not a mechanic at all) but I messed around and should have went to Jaguar immediately. Surely Jag can pin point the issue for you? Regards and good luck, Mannix
Thread
Thread Starter
Forum
Replies
Last Post
Rlover
XJ XJ8 / XJR ( X308 )
10
03-30-2016 10:04 PM
rachelstr
S-Type / S type R Supercharged V8 ( X200 )
7
09-03-2015 12:59 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)