Closed loop Co prob
26-07-2008, 01:58 PM
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Closed loop Co prob
Just fitted a msd closed loop chip
Took the car into work to check the co and this is what i have
Wtf is going on
Could this be a sensor problem i used a bosch lambda sensor(not from msd) so should i try another lambda
This is all new stuff to me
26-07-2008, 01:59 PM
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Did you follow the procedure for resetting the CO screw aswell that came with the fitting instructions for the chip?
26-07-2008, 02:04 PM
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26-07-2008, 02:06 PM
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put a multimeter across ecu pins 1 and 2....you should see the rise and fall in voltage from the lambda sensor....
26-07-2008, 02:09 PM
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you did the wiring change on your tps? if it was L6....before
26-07-2008, 02:16 PM
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Quote:
Originally Posted by
JTECHSAFF
put a multimeter across ecu pins 1 and 2....you should see the rise and fall in voltage from the lambda sensor....
fuel pressure set to 3 bar
just checked wih the multimeter set to 20v and was getting a reading of .065 ish
and got a 2nd hand 4x4 tps off Ryan and swapped the wires over this morning
26-07-2008, 02:28 PM
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fuel pressure on stus chips is 3.5bar at idle, vac pipe off...giving around 3.2 pipe on.
26-07-2008, 02:38 PM
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Quote:
Originally Posted by
JTECHSAFF
fuel pressure on stus chips is 3.5bar at idle, vac pipe off...giving around 3.2 pipe on.
ect is less than 2 years old
set the tps to .35v via pin 1 and 17
the engine has always had high co but this takes the piss
26-07-2008, 02:43 PM
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try unplugging the lambda ..does the c.o change?
Last edited by JTECH James; 26-07-2008 at 02:50 PM .
26-07-2008, 02:51 PM
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Quote:
Originally Posted by
JTECHSAFF
try unplugging the lambda ..
got a secs moniter the map sensor part has never worked (thinking about it always shown 0.00)
26-07-2008, 02:53 PM
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back home so cant see if the co changes but i have a zeitronix afr if i could use that
26-07-2008, 02:55 PM
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lamda wouldnt cause the mixture to be out by THAT much tho! i suspect a more important sensor fault
26-07-2008, 02:56 PM
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check your secs wiring then for the map signal....you may find its over reading...
26-07-2008, 03:00 PM
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Quote:
Originally Posted by
Jim Galbally
lamda wouldnt cause the mixture to be out by THAT much tho! i suspect a more important sensor fault
they can do jim, mine went to 8%odd when the lambda was unplugged, it depends how the global mod is adjusted iirc.
they always go rich when lambda sensor fails for safety
26-07-2008, 03:00 PM
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Quote:
Originally Posted by
JTECHSAFF
check your secs wiring then for the map signal....you may find its over reading...
its got a new loom off Ryan but was the same this with the old loom
26-07-2008, 03:02 PM
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think i will get a new map sensor and see what that does anything
26-07-2008, 03:04 PM
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jtech, not THAT rich tho
the closed loop wouldnt even adjust that much extra fuel if it was reading constantly lean on the sensor!
26-07-2008, 03:06 PM
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mine did jim,,,it ran at 0.90% LS plugged in, and 8%unplugged
on 55lb injectors.
i could weaken it off,by using the global mod, but i ran it uber safe at the top, so chose to run it rich, the closed loop dealt with it a treat low down
mind you i probably had big issues back then
Last edited by JTECH James; 26-07-2008 at 03:23 PM .
26-07-2008, 03:35 PM
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Best to phone stu and make use of his excellent after sales service matt.
26-07-2008, 03:58 PM
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i don't beleive for a minute that stu sets his base map to 8% and the closed loop is the only thing bringing it down to lambda 1.
there must be something fishy going on
26-07-2008, 04:16 PM
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it was a year ago
its all new now
26-07-2008, 05:21 PM
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Best to phone stu and make use of his excellent after sales service matt.
i tried to call him but the lazy git only does a half day on saturdays
with any luck stu will see this post and might be able to shed some light on whats going on
26-07-2008, 05:24 PM
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hes playing metal gear solid on his ps3 right now
26-07-2008, 05:35 PM
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Quote:
Originally Posted by
Matt Baxter
i tried to call him but the lazy git only does a half day on saturdays
with any luck stu will see this post and might be able to shed some light on whats going on
Alright for some. !!
26-07-2008, 07:44 PM
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i know, i must be doing the wrong job
26-07-2008, 08:00 PM
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not sure if its any help bu twhen i had my car set up at stus kenny couldnt get the ecu to lock on to the lamber sensor, it kept returning to base map, turned out the lamber was fooked
26-07-2008, 08:14 PM
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Quote:
Originally Posted by
JTECHSAFF
hes playing metal gear solid on his ps3 right now
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Matt I assume the car is warm etc whenyour checking the co? does it idle very smoothly or seem to slightly hunt?
Last edited by trevCOSS; 26-07-2008 at 08:16 PM .
26-07-2008, 08:25 PM
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tev, it shouldnt be 8% when its stone cold
26-07-2008, 08:29 PM
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Quote:
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Matt I assume the car is warm etc whenyour checking the co? does it idle very smoothly or seem to slightly hunt?
yeah nice and hot fans had cut in/out
the idle is fine/smooth (idle valve disconnected)
26-07-2008, 08:31 PM
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Quote:
Originally Posted by
Jim Galbally
tev, it shouldnt be 8% when its stone cold
rubbish im all out of ideas then lol
26-07-2008, 08:34 PM
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Evening Matt, before i go back to MGS, have you actually tried triming it with the CO screw? Some of the ECU analogeis circuits seem to differ. try taking 1 - 2 turns anti clockwise off the trimmer.
26-07-2008, 08:56 PM
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Quote:
Originally Posted by
Stu @ M Developments
Evening Matt, before i go back to MGS, have you actually tried triming it with the CO screw? Some of the ECU analogeis circuits seem to differ. try taking 1 - 2 turns anti clockwise off the trimmer.
Hi Stu
yeah tried adjusting the co screw didnt make a lot of difference (was at 9+ co)
can you do me a deal on all of the above sensors + map sensor as at least then i can rule them out
26-07-2008, 08:58 PM
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also on the afr its about 10.5 at idle what sort of figure should be looking for
26-07-2008, 08:59 PM
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did you get the lambda just for this ? or for a wideband gauge ?
26-07-2008, 09:03 PM
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Quote:
Originally Posted by
Matt Baxter
also on the afr its about 10.5 at idle what sort of figure should be looking for
14.5-14.7 ish id say
26-07-2008, 09:39 PM
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it should be bang on 14.7 as it's closed loop
10.5:1 would be considered "properly rich" even if on full boost at full revs
26-07-2008, 09:42 PM
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Jim it will cycle as it's in a closed-loop feedback system
e.g.
Lambda < 1: Trim fuel
Lambda > 1: Add fuel
ad nauseum.
Neil.
26-07-2008, 09:44 PM
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pmsl @atu playing ps3 that shit will stop when young un makes a appearence
26-07-2008, 09:46 PM
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Quote:
Originally Posted by
Jim Galbally
it should be bang on 14.7 as it's closed loop
10.5:1 would be considered "properly rich" even if on full boost at full revs
doesnt stay static jim
take it you have seen a lambda signal on a scope then......
Last edited by JTECH James; 26-07-2008 at 09:49 PM .
26-07-2008, 09:47 PM
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yeah but it will wander around 14.7 not 14.5
26-07-2008, 01:58 PM
Closed loop Co prob
