lambda sensor
14-12-2006, 09:01 AM
#43
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Originally Posted by Dave Henshall
gingers
any updates - are you working again?
any updates - are you working again?
Fitted the new plugs and lambda sensor on Sunday afternoon.
Adjusted the CO pot and started her up. Seemed to start ok, (still takes longer than the old chip, for some unknown reason, maybe the babyboard I fitted?)
Took her for a long drive on Monday, my day off, and dropped in at SCC for a quick check.
Bunged the exhaust analyser up its bum, and the CO was at 0.5-6%
I was under the impression it needed to be at 0.9% (to be rich enough on boost, global modifier and all that) so I messed around with it but couldn’t richen it up without it switching to the conventional map (non closed loop).
As I didn’t wanna take up too much of pat and rob’s time, we got it running at about 1% CO but I think its too rich as it keeps swapping from closed loop to normal (I can tell this by the voltage output from the lambda).
Upon chatting with Stu after I had got home it seems perfectly fine to have it running at 0.5% CO and 0.9% is the maximum value. So all the fiddling was unnecessary, just my luck!
So I am planning on going back to SCC at the weekend and getting it running.
Then put a full tank of juice in it, and seeing what the mpg does now
14-12-2006, 09:49 AM
#44
I was under the impression it needed to be at 0.9% (to be rich enough on boost, global modifier and all that) so I messed around with it but couldn’t richen it up without it switching to the conventional map (non closed loop).
As I didn’t wanna take up too much of pat and rob’s time, we got it running at about 1% CO but I think its too rich as it keeps swapping from closed loop to normal (I can tell this by the voltage output from the lambda).
Upon chatting with Stu after I had got home it seems perfectly fine to have it running at 0.5% CO and 0.9% is the maximum value. So all the fiddling was unnecessary, just my luck!
As I didn’t wanna take up too much of pat and rob’s time, we got it running at about 1% CO but I think its too rich as it keeps swapping from closed loop to normal (I can tell this by the voltage output from the lambda).
Upon chatting with Stu after I had got home it seems perfectly fine to have it running at 0.5% CO and 0.9% is the maximum value. So all the fiddling was unnecessary, just my luck!
Simply ensure the fuel mixture is below 0.9% with the engine hot and all electrics switched off. No further adjustments are required and the instructions to adjust co for non lambda software can be ignored totally unless the Co needs trimming down to meet the figures above.
14-12-2006, 10:15 AM
#45
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Originally Posted by Stu @ M Developments
I was under the impression it needed to be at 0.9% (to be rich enough on boost, global modifier and all that) so I messed around with it but couldn’t richen it up without it switching to the conventional map (non closed loop).
As I didn’t wanna take up too much of pat and rob’s time, we got it running at about 1% CO but I think its too rich as it keeps swapping from closed loop to normal (I can tell this by the voltage output from the lambda).
Upon chatting with Stu after I had got home it seems perfectly fine to have it running at 0.5% CO and 0.9% is the maximum value. So all the fiddling was unnecessary, just my luck!
As I didn’t wanna take up too much of pat and rob’s time, we got it running at about 1% CO but I think its too rich as it keeps swapping from closed loop to normal (I can tell this by the voltage output from the lambda).
Upon chatting with Stu after I had got home it seems perfectly fine to have it running at 0.5% CO and 0.9% is the maximum value. So all the fiddling was unnecessary, just my luck!
Simply ensure the fuel mixture is below 0.9% with the engine hot and all electrics switched off. No further adjustments are required and the instructions to adjust co for non lambda software can be ignored totally unless the Co needs trimming down to meet the figures above.
all sorted, will be at 0.5% on saturday morning
it idled very smoothly at this point, just didnt have the instructions with me, but did re-read after and it does say 0.9% max value
0.5% is pretty much lambda =1 so the chip must be doing its job
14-12-2006, 11:31 AM
#47
Originally Posted by gingeRS
all sorted, will be at 0.5% on saturday morning
it idled very smoothly at this point, just didnt have the instructions with me, but did re-read after and it does say 0.9% max value
0.5% is pretty much lambda =1 so the chip must be doing its job
it idled very smoothly at this point, just didnt have the instructions with me, but did re-read after and it does say 0.9% max value
0.5% is pretty much lambda =1 so the chip must be doing its job
14-12-2006, 11:52 AM
#48
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Originally Posted by Stu @ M Developments
Originally Posted by gingeRS
all sorted, will be at 0.5% on saturday morning
it idled very smoothly at this point, just didnt have the instructions with me, but did re-read after and it does say 0.9% max value
0.5% is pretty much lambda =1 so the chip must be doing its job
it idled very smoothly at this point, just didnt have the instructions with me, but did re-read after and it does say 0.9% max value
0.5% is pretty much lambda =1 so the chip must be doing its job
set base idle first, then adjust CO?
14-12-2006, 01:13 PM
#49
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the GGR ones are what i use, they have a weber 'W' stamped on them.
here is what the voltage should do, I measured it on my closed loop l8 at 2000rpm
here is what the voltage should do, I measured it on my closed loop l8 at 2000rpm
14-12-2006, 01:30 PM
#50
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Originally Posted by the original
the GGR ones are what i use, they have a weber 'W' stamped on them.
here is what the voltage should do, I measured it on my closed loop l8 at 2000rpm
here is what the voltage should do, I measured it on my closed loop l8 at 2000rpm
i didnt have an oscilloscope but from monitoring it on a voltmeter
thats the output signal i was getting at idle.
now in a few weeks i'll report back to see if my fuel economy has improved
14-12-2006, 01:38 PM
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im sure it will, as that is how it should work - only if you are at more than somthing like 30% throttle(stu's instructions conform the exact figures), above certain boost or below certina temp does the closed loop not work and the standard mapping takes over for safety reasons.
likei said earlier, on mine on a cruise i can get 34mpg running greens with a t34
likei said earlier, on mine on a cruise i can get 34mpg running greens with a t34
14-12-2006, 02:17 PM
#52
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Originally Posted by Dave Henshall
likei said earlier, on mine on a cruise i can get 34mpg running greens with a t34
14-12-2006, 02:44 PM
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it'll be reeet
as stu said in another post about his idle setup - its not something i noticed until he said, but yes indeed, the cold idle is MUCh improved even over the factory chip, much more stable and refined
as stu said in another post about his idle setup - its not something i noticed until he said, but yes indeed, the cold idle is MUCh improved even over the factory chip, much more stable and refined
18-12-2006, 11:53 AM
#56
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Originally Posted by JTECHSAFF
i checked my lambda voltage today and its reading between 0v and 1.5v....... is that ok?
you guys mentioned about it reading 1v rich, not 1.5v
you guys mentioned about it reading 1v rich, not 1.5v
i was trying to set my base idle yesterday but couldnt get it to idle real smoothly. when in closed loop it would idle @ 900 rpm and hunt around (from 900-1000rpm, in sync with what the lambda sensor was doing).
when i had it idling really smoothly, i would stick the probes on the ecu, only to discover it was reading 1.31v and was out of closed loop. then i would back the CO off to get it into closed loop and the slower idle would happen.
will take a litttle more fine tuning i feel
18-12-2006, 12:31 PM
#58
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Originally Posted by JTECHSAFF
contact Stu again ,mine doesnt hunt around like that, can be a sign that its too weak if it picks up on the lambda surge, may be other adjustments you need to make,
the engine deffo over 70 degrees when you adjust it?
the engine deffo over 70 degrees when you adjust it?
no point contacting stu just yet, will try and get to the bottom of it.
just seems to be a really fine art to getting it to idle:
a) so its definetly on closed loop
b) at 950rpm
c) that the iscv is having no effect on it at all
will have another go at SCC tomorrow, if i get the chance.
it much easier to do with a CO analyser than it is with a voltmeter on pins 1 and 2.
had it idling happily at 0.5% before, will try and get that again
18-12-2006, 01:17 PM
#60
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Originally Posted by Dave Henshall
does the l8 have any keep alive parameters that need resetting by ditching the power..?
my friend did this on his TVR the other day and said it totally transformed the car, behaved much better afterwards
dunno really?
18-12-2006, 06:42 PM
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Originally Posted by gingeRS
Originally Posted by JTECHSAFF
i checked my lambda voltage today and its reading between 0v and 1.5v....... is that ok?
you guys mentioned about it reading 1v rich, not 1.5v
you guys mentioned about it reading 1v rich, not 1.5v
i was trying to set my base idle yesterday but couldnt get it to idle real smoothly. when in closed loop it would idle @ 900 rpm and hunt around (from 900-1000rpm, in sync with what the lambda sensor was doing).
when i had it idling really smoothly, i would stick the probes on the ecu, only to discover it was reading 1.31v and was out of closed loop. then i would back the CO off to get it into closed loop and the slower idle would happen.
will take a litttle more fine tuning i feel
19-12-2006, 08:20 AM
#64
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Originally Posted by trevCOSS
Originally Posted by gingeRS
Originally Posted by JTECHSAFF
i checked my lambda voltage today and its reading between 0v and 1.5v....... is that ok?
you guys mentioned about it reading 1v rich, not 1.5v
you guys mentioned about it reading 1v rich, not 1.5v
i was trying to set my base idle yesterday but couldnt get it to idle real smoothly. when in closed loop it would idle @ 900 rpm and hunt around (from 900-1000rpm, in sync with what the lambda sensor was doing).
when i had it idling really smoothly, i would stick the probes on the ecu, only to discover it was reading 1.31v and was out of closed loop. then i would back the CO off to get it into closed loop and the slower idle would happen.
will take a litttle more fine tuning i feel
mine idles dead smoothly, then as it hits a certain temp, you can feel it cut to closed loop and the idle starts oscilalting with the lambda
going SCC this afternoon see if i can get it sorted
let me know, if your new map sensor has any effect, mine only 12 months old
19-12-2006, 09:38 AM
#65
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Originally Posted by gingeRS
mine idles dead smoothly, then as it hits a certain temp, you can feel it cut to closed loop and the idle starts oscilalting with the lambda
19-12-2006, 10:20 AM
#66
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Originally Posted by Dave Henshall
Originally Posted by gingeRS
mine idles dead smoothly, then as it hits a certain temp, you can feel it cut to closed loop and the idle starts oscilalting with the lambda
19-12-2006, 03:50 PM
#68
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got her running at scc today
she runs at 0.5% CO @ idle and the lambda closed loop is working
you can still feel the idle changing as it closed loop goes from rich to lean, but there doesnt seem to be much i can do about that
have filled her up with juice and will report back any improvement in fuel economy as i finish this tank
she runs at 0.5% CO @ idle and the lambda closed loop is working
you can still feel the idle changing as it closed loop goes from rich to lean, but there doesnt seem to be much i can do about that
have filled her up with juice and will report back any improvement in fuel economy as i finish this tank
19-12-2006, 04:25 PM
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Originally Posted by gingeRS
Originally Posted by trevCOSS
Originally Posted by gingeRS
Originally Posted by JTECHSAFF
i checked my lambda voltage today and its reading between 0v and 1.5v....... is that ok?
you guys mentioned about it reading 1v rich, not 1.5v
you guys mentioned about it reading 1v rich, not 1.5v
i was trying to set my base idle yesterday but couldnt get it to idle real smoothly. when in closed loop it would idle @ 900 rpm and hunt around (from 900-1000rpm, in sync with what the lambda sensor was doing).
when i had it idling really smoothly, i would stick the probes on the ecu, only to discover it was reading 1.31v and was out of closed loop. then i would back the CO off to get it into closed loop and the slower idle would happen.
will take a litttle more fine tuning i feel
mine idles dead smoothly, then as it hits a certain temp, you can feel it cut to closed loop and the idle starts oscilalting with the lambda
going SCC this afternoon see if i can get it sorted
let me know, if your new map sensor has any effect, mine only 12 months old
19-12-2006, 04:27 PM
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Originally Posted by JTECHSAFF
what makes you think you have a map sensor fault mate?
mines been reading higher than normall for a week ,reads 0.07 when ign is on ,engine off..... normally was 0.03...
mines been reading higher than normall for a week ,reads 0.07 when ign is on ,engine off..... normally was 0.03...
but seriously it had been glued before and im not sure that it wasnt leaking air very slightly
19-12-2006, 04:30 PM
#71
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i set mine to 950 rpm, with iscv un plugged today
ford rev counter is miles out, i used a mac timing light, and 950 rpm on the timing light looks like 700rpm on the rev counter
seems ok, it seems low, but the fact i have vibratecnic mounts all round may be misleading me
any other way to verify engine speed?
ford rev counter is miles out, i used a mac timing light, and 950 rpm on the timing light looks like 700rpm on the rev counter
seems ok, it seems low, but the fact i have vibratecnic mounts all round may be misleading me
any other way to verify engine speed?
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