#496: Re: Project sleeper Author: Edward, Location: In the garagePosted: Wed Jun 23, 2010 3:09 pm ---- Did some data logging earlier. I reviewed some of the data and on occasions the coolant temperature suddenly dips. The car was run for ten minutes then switched off for 10 mins. The car was then driven for another 10 mins then sat for 10 mins. Then I drove the car and it did the cutting out problem where the engine dies and the rev counter dips to zero.
Analysing the data from the Omex it shows the coolant temperature dropping to very low levels. The lowest was 6 degrees, half a second later the temp was 90 degrees. After the engine was driven so far there's no way the temperature was that low, A similar thing happened a few times and can be seen on the blue lower line on the picture. All the dips are where the low temperatures are recorded. I can see how this could cause a cut out but when the engine is still turning I don't see why the rev counter dips.
Last edited by Edward on Fri Jun 25, 2010 11:50 am; edited 4 times in total
#497: Re: Project sleeper Author: Seb, Location: Under your bedPosted: Wed Jun 23, 2010 4:33 pm ---- It must be adjusting the fuelling to compensate for the 'lower' temperate do you think?
In which case the problem would not seem to be the cutting out, but either a faulty sensor, or some sort of surge somewhere causing a spike and interfering with ECU readings?
#498: Re: Project sleeper Author: Edward, Location: In the garagePosted: Wed Jun 23, 2010 11:38 pm ---- From looking at all the other sensor outputs though it just seems like it's the coolant sensor that's spitting out strange numbers. Unless there is some other logical reason for the sesnor to be showing low numbers it must point to the sensor being faulty. I never liked the look of it anyway.
#499: Re: Project sleeper Author: macj, Location: EssexPosted: Thu Jun 24, 2010 9:28 am ---- I am not keen on crimp connectors for sensors..... nice to see your upgrade will be solder conections, That is a sure fire way of good signals
#500: Re: Project sleeper Author: Edward, Location: In the garagePosted: Thu Jun 24, 2010 12:31 pm ---- So what coolant sensor do you use Mac?
It might be interesting to see the frequency of the temperature drop offs when the car is running normally - i.e. before it has got to the cut out stage.
I'm sure fitting a proper loom will cost a few quid but it's got to be worth it. I imagine I'll have to take the thermostat housing off to get it tapped for the Omex temp sensor so there's a bit of hassle involved too. So where's the best place for the Omex in the car? I quite like the idea of it sitting in the pocket at the back of the centre console behind the alarm button but the wiring would be quite long (not too big a problem) and although the car isn't parked anywhere but in the garage it's best not to leave it exposed.
I also fitted a silicone blue vacuum hose yesterday just to make sure the existing scruffy rubber hose wasn't a potential air leak problem. Anymore blue silicone and it might start looking a bit tacky.
#501: Re: Project sleeper Author: vanman_foci, Location: Barry, South WalesPosted: Thu Jun 24, 2010 12:39 pm ----
Edward wrote:
So what coolant sensor do you use Mac?
It might be interesting to see the frequency of the temperature drop offs when the car is running normally - i.e. before it has got to the cut out stage.
I'm sure fitting a proper loom will cost a few quid but it's got to be worth it. I imagine I'll have to take the thermostat housing off to get it tapped for the Omex temp sensor so there's a bit of hassle involved too. So where's the best place for the Omex in the car? I quite like the idea of it sitting in the pocket at the back of the centre console behind the alarm button but the wiring would be quite long (not too big a problem) and although the car isn't parked anywhere but in the garage it's best not to leave it exposed.
I also fitted a silicone blue vacuum hose yesterday just to make sure the existing scruffy rubber hose wasn't a potential air leak problem. Anymore blue silicone and it might start looking a bit tacky.
Would be good to have it on show so to speak
I'm glad your now finding out whats wrong, prehaps soon it will be running like a dream for you
#502: Re: Project sleeper Author: Edward, Location: In the garagePosted: Thu Jun 24, 2010 12:47 pm ---- It's on permanent show in my garage because the bonnet is open all the time due to it's unreliability problems!
At least so far it's consistently and predictably unreliable under the same conditions.
#503: Re: Project sleeper Author: macj, Location: EssexPosted: Thu Jun 24, 2010 2:36 pm ---- will reply in full when I get home....away at present
#504: Re: Project sleeper Author: Christer, Location: Stockholm, SwedenPosted: Fri Jun 25, 2010 1:20 am ---- Maybe the wires from the coolant sensor picks up interference along the way to the Omex?
#505: Re: Project sleeper Author: Edward, Location: In the garagePosted: Fri Jun 25, 2010 10:28 am ---- They could be...who knows...I'm just going to have the delve into the loom and what's there.
#506: Re: Project sleeper Author: macj, Location: EssexPosted: Fri Jun 25, 2010 11:58 am ---- Sorry for the delay in replying, I use the standard peugeot temp sensor, I feel that they think its good enough for a production cars so its good enough for me.
I also have a smaller one tapped into the bleed screw hole for my digital dash. In your case you may need to fit the omex sensor as previously discussed and calibrate it to the ECU. Have you found out the make of the Ecosse fitted sensor?
What cable connector has your ECU got to connect the laptop?
#507: Re: Project sleeper Author: Edward, Location: In the garagePosted: Fri Jun 25, 2010 11:59 am ---- There's been quite a bit of emailling Omex this week. I must say their customer service is very impressive.
They asked for a copy of the data logging and the map calibration (thankfully it wasn't locked) and they agree the coolant temperature fluctuating isn't right.
Best thing is they even did some mapping adjustments to it to help it run better. They've lowered the default air inlet temp setting which was fixed at 25 degrees and lowered it to 20 degrees. This will sort itself when an inlet air temp sensor is fitted.
They also adjusted the ignition timing at idle and changed the scatter spark idle control slightly so hopefully that may help with the idle problem. They have also reduced the ignition timing at closed throttle at around 3000rpm to see if ignition timing is holding the engine speed up.
A few other companies could certainly learn a thing or two about the support Omex provide.
#508: Re: Project sleeper Author: Edward, Location: In the garagePosted: Fri Jun 25, 2010 12:19 pm ----
macj wrote:
Sorry for the delay in replying, I use the standard peugeot temp sensor, I feel that they think its good enough for a production cars so its good enough for me.
I also have a smaller one tapped into the bleed screw hole for my digital dash. In your case you may need to fit the omex sensor as previously discussed and calibrate it to the ECU. Have you found out the make of the Ecosse fitted sensor?
What cable connector has your ECU got to connect the laptop?
Can you think of a reason the Omex can't be plugged into the standard sensor? Mine is just there to operate the dash guage but why can't it operate the Omex too?
So yours just works the opposite way round to mine...I don't know what make the sensor is.
I've just bought a serial to USB convertor that plugs straight into the laptop.
#509: Re: Project sleeper Author: macj, Location: EssexPosted: Fri Jun 25, 2010 12:27 pm ---- OK
I see no reason you cant use it for both. I would try using it for just the ECU, get it working and then see if it will run in parallel with your guage.
alternatively get an OEM sensor fitted in the casting and run them seperately, Got a feeling it may sort out your issues.
On a seperate note, I got MOT tested yesterday, Emissions were over double the limit at idle but the lambda was spot on across the range. A little tweak and passed with no advisories.... very happy
#510: Re: Project sleeper Author: Edward, Location: In the garagePosted: Fri Jun 25, 2010 12:42 pm ---- I think I'll invest in one of the Omex temp sensor. At least it will look the part too.
When it comes to MOT I dread to think what mine will be pumping out. Were all your emissions a problem or just certain ones? Mine only just scraped through before the TB's were fitted. I don't think the 200 cell cat helped much.
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