AlexXtreme
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 posted on 29/8/13 at 03:50 PM |
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running rich... and kangarooing
Hi All,
I am running a pretty std Ford Zetec with an Omex 600 / Jenvy throttle bodies etc and the car (a Quantum Xtreme) has been great over the last fwe
years however it has started behaving as though it is running with an old fashioned choke on all the time (ie running rich)and kangarooing at low
speed as well as only getting 20mpg.
I can see nothing obviously wrong and I really want (read that as I dont know if I have the ability to) to start interrogating the Omex unit to find
out want is wrong. Any ideas what can cause this? Can it be a fault water temp or lamda sensor? Is there anything that can normally cause this with
this (relatively) simple set - up?
Thanks in advance
Alex
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Xtreme Kermit
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| posted on 29/8/13 at 04:44 PM |
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Welcome along!
Can't really claim to be an Omex expert, but it sounds like you are poking the right things.
I am not sure how much use the Quantum base Omex map uses the Lambda, so I would be tempted to start with temp sensors for water and air followed by
the crank.
I am sure an Omex expert will be along soon.
BTW the Xtreme/Zetec/Omex is currently my favourite combo 
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gremlin1234
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| posted on 29/8/13 at 05:24 PM |
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whats the fuel pressure like?
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Ivan
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| posted on 29/8/13 at 05:40 PM |
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Kangarooing at low throttle angles can be a result of too much timing advance.
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Oddified
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| posted on 29/8/13 at 06:33 PM |
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If it's been ok for a several years, and now it's not happy, the first thing i'd look at it is the throttle pot (worn pot, voltage
jumping around as it's operated/incorrect idle voltage etc).
Ian
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sssline
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| posted on 29/8/13 at 06:35 PM |
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Hi,
I am no expert but if it was working fine and you havent altered anything in the Map then sensors, fuel pressure etc all seem likley, might be worth
checking the readings and seeing what the Omex is seeing... is it TPS if so is zero throttle actually zero, coolant temp and air temp do they look
right, both can be configured to alter fueling so may be having an impact if not correct, it prob uses closed loop on the lambda so that could also
have an impact if not working.
Plug in a lead and have a look, cant do any harm and it might be something obvious.... Or a session on the rollers with someone who knows what they
are doing 
Cheers
Tony.R
https://www.facebook.com/groups/swkitcars/
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I predict a Riot
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| posted on 29/8/13 at 07:10 PM |
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That sounds like classic lambda failure. Quickest way is to test by replacement, can you borrow a friends?
"Honesty is a very expensive gift. Do not expect it from cheap people ". Warren Buffet on Expectation
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britishtrident
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| posted on 29/8/13 at 08:22 PM |
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Check the coolant, inlet air sensors throttle pot in via software to see if the readings make sense.
One thing not to do is start changing sensors at random.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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AlexXtreme
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| posted on 29/8/13 at 09:34 PM |
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Hi Guys,
Firstly thanks for the comments :-)
1. I am pretty confident the fuel pressure is OK. Earlier in the year the pump was blowing off a very slightly perished fuel pipe
2. the set up has not done many miles... perhaps 5k, would the throttle sensors be worn in this time?
3. How easy is it to access the Omex management system? I see I can down load software for free, which software should I use, is it easy to do etc?
Sorry I am not a tecky but happy to learn, what do I need other than a lap top and is the software easy to use?
4. I though of trying to change sensors such as the water temp or the lambda but am afraid of chasing my tail a bit (no I cant borrow any ones :-( ).
If it is the lambda sensor, can I use a std one for say a fiesta 1.6 sigma zetec?
Cheers
Alex
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daveb666
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| posted on 29/8/13 at 09:42 PM |
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quote:
Originally posted by AlexXtreme
2. the set up has not done many miles... perhaps 5k, would the throttle sensors be worn in this time?
The sensor itself is likely to be OK, but they're usually only held in by a couple of bolt so if the bolts slacken off then the readings are
just bollox.
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AlexXtreme
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| posted on 29/8/13 at 09:44 PM |
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Thanks Dave, good suggest.
I will have a look tomorrow. I did remember having a poke round there and did not see anything untoward but could have missed something
Cheers
Alex
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daveb666
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| posted on 29/8/13 at 10:16 PM |
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Not used to Omex but the MBE/DTA stuff are very sensitive.
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dhutch
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| posted on 30/8/13 at 04:50 AM |
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Where are you based?
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AlexXtreme
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| posted on 30/8/13 at 08:04 AM |
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I had a poke round the car this morning (I was a bit late for work ... needs must!), the throttle sensor is very firmly bolted in place, the coolant
is full. Also had a quick run through the wiring (I dont like those crappy white Ford joint connectors) and it all looks sounds as far as I can
see.
Dhutch, I am based in the Southampton area, Hants.
When I get the car fixed, I was going to get it tuned on a rolling road but at the moment I can not find anyone in Hampshire who would touch it..
Cheers
Alex
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daveb666
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| posted on 30/8/13 at 01:20 PM |
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www.sbdev.co.uk are by the far one of THE best n/a mapping companies around. They also specialise in kit cars and Jenveys.
bout an hour away from you
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AlexXtreme
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| posted on 30/8/13 at 01:32 PM |
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Thanks Dave... :-), they are around 80miles. with the current fuel consumption, around a tank of fuel! I will drop them an email and see is they will
look at the car
Should I not solve the problem before getting the car tuned just in case it is just a faulty sensor or similar?
Alex
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daveb666
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| posted on 30/8/13 at 02:11 PM |
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Its worth having a look yourself first; even if only for the experience of learning how to use the management interface. I've only had
experience of MBE but it really is easy to see how everything goes together on the screen.
I'd ring though rather than email; they get emails from all over the world (some people get Steve to fly to their country to map their car!!) so
if you want a prompt answer you'd probably be best off ringing.
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AlexXtreme
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| posted on 30/8/13 at 09:39 PM |
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Thanks Dave for the comments..... will try and get a RS232 cable connected that I have lying around and see what I can see!
Anyone else have any experience looking at the Omex management software?
Alex
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sssline
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| posted on 30/8/13 at 09:51 PM |
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Alex,
I found the Omex fairly straightforward, as a fist time user, just downloaded all the guides from their web site and read a few times, once you have a
connection via MAP3000 then it's all pull down menus etc, I thought the guides were fairly easy to follow and there's loads of info via
google.
Cheers
Tony.R
https://www.facebook.com/groups/swkitcars/
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AlexXtreme
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| posted on 4/9/13 at 01:24 PM |
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Hi Tony
Based on what you have said, I am giving it a try and the USB to RS232 cable arrived today, started reading the manuel, downloaded the software... so
this is the weekend's job :-). Which is a good site to look for answer to questions I might have?
Dave, Steve did answer my email! However they do not do Omex management systems unfortunately and suggested that I contact one of their recommended
agents - the nearest one that would look at is is North London / Essex - which is too far for me!
Just in case I can't fix it myself, does anyone know of someone who can tune an Omex management system in the Hampshire area.... there must be
someone!
Cheers
Alex
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jeffw
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| posted on 4/9/13 at 01:38 PM |
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Ring Omex and ask?
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sssline
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| posted on 5/9/13 at 06:56 PM |
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Hi,
Can't help re Hampshire, mine went back to Mark at Quantum cars to be fully mapped on his rolling Road, came away much improved 150whp and 150
torques, I was interested in the transients rather than main maps so most of my google searches were around understanding these, no particular site
but deff some good info out there.
Yours sounds more like fault finding, checking signals and readings etc it can get a bit addictive, running logs, seeing what's happening etc...
Cheers
Tony.R
https://www.facebook.com/groups/swkitcars/
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AlexXtreme
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| posted on 6/9/13 at 02:54 PM |
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Cheers Guys... trying fault finding this weekend.
Even when I find the fault, I plan to get it tuned up.
Mark, I saw that you went back to Mark at Quantum, it is a good 3hours plus drive for me each way. That is my last resort!
The car originally tuned by the original Quantum company, and looking at the butterfly gaps at tick-over and reading the tuning set-up instructions
from Jenvey etc, I just get the feeling that the car is not quite running as well as it could.
Cheers
Alex
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AlexXtreme
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| posted on 6/9/13 at 02:56 PM |
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Sorry meant to say, tried calling Omex and they do not have any nearby they know of... but said that there are one-man companies who could help. Just
dont know where to find to find them
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AlexXtreme
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| posted on 7/9/13 at 11:44 AM |
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help required read out from Omex 600
feeling a bit pleased with myself
Managed to get the laptop to talk to the usb cable first time and to get the MAP3000 Omex software to talk to the ECU! Had some difficulty with board
rates changing on the driver but set it to 9600 and everything seemed happy!
The question is how do I interpret what I have seen.
I have made some screen shots of some of the readings that I thought might be relevant incl Idle and the ox screen.... I put them in a pdf and shared
them on the attached link ... hope you can access this as I have not done this before! Please let me know if you can!!!
Thanks in advance
Alex
https://docs.google.com/file/d/0B0txfXCSQTNVbEFBYTkyV3JNYVk/edit?usp=sharing
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