jonesier1
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| posted on 23/9/09 at 08:23 PM |
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getting co down in m's
i have now sorted most of my problems and the car now running and starts ok'ish,idles fine,drives on light throttle ok but dies any with more
and the same if rev'd ,i only have till tues due to a late sva retest and am struggling to get the co down to the correct level for the test.The
co is 5% at idle and off the scale at 3000rpm with a cat  ,i have tried adjusting fuel req (now at 3)and the ve map,will changing the pw of the inj
help?(75 current and 1.0 threshold).I am using cossie inj with ms2 extra 2.0 on a 2.0 zetec. and its on alpha n.
[Edited on 23/9/09 by jonesier1]
[Edited on 23/9/09 by jonesier1]
im in my own little world...its ok though they know me there
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brianthemagical
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| posted on 23/9/09 at 09:02 PM |
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Wat kind of afr's are you running? Try and have a play with the ignition timing aswell, that has an effect.
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jonesier1
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| posted on 23/9/09 at 09:10 PM |
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the gauge on the screen reads 12 so do i adjust that on the afr table? it has an lc-1 not tried the timing,again adjust on the table to get the req
reading on the gauge ?
im in my own little world...its ok though they know me there
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brianthemagical
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| posted on 23/9/09 at 09:28 PM |
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Well it's running too rich. But with your req fuel so low, you could do with sorting that first. what engine is it on?
Can you post up your MSQ?
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BenTyreman
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| posted on 23/9/09 at 10:28 PM |
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Are those low impedance injectors? High impedance injectors should have current limit = 100% and threshold = 25.4 ms.
Calculate the Req Fuel value using built-in calculator. You will need to know the approximate flow rate of the injectors. If the injectors are quite
big, you will probably have to go for 2 squirts alternating to get a decent Req Fuel.
Once Req Fuel is set, change the AFR by altering the VE table only.
As said, it's hard to help without the MSQ and a corresponding datalog.
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jonesier1
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| posted on 24/9/09 at 09:45 AM |
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its a 2.0 zetec silver top with a single throttle body,lc-1 and i have now put the standard ford injectors in,upped the fuel req and ve to get it to
run but co is still high but not as much also now a pig to start,could be down to the coolant sensor values,not sure what they should be for a
standard ford coolant temp sensor.
msq attached (i think!)
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BenTyreman
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| posted on 24/9/09 at 11:58 AM |
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I have 2 other 2.0 Zetec MSQs. They have Req Fuel values of 9.5 and 10.0. That would imply your setting of 7.5 is still a bit low, depending on your
injector size.
If you have a single throttle body the first thing I would do is switch from Alpha-N to Speed Density. Also change the Primary Ignition Load to Speed
Density. I would disable the Secondary Fuel Load.
Your AFR table suggests you are trying to tune for for values other than 14.7 at 3000 RPM. As well as low CO, you need to maintain lambda between 0.95
and 1.05 (AFR values of 14.0 and 15.4).
The cranking values are a multiplier of your Req Fuel value. If it was starting fine before, then divide your cranking values by the percentage
increase in Req Fuel (i.e. if Req Fuel has gone from 2.5 to 7.5, divide all the cranking values by 3). You would have to ask someone else about the
calibration of Ford temperature sensors, but a good check is to make sure the air temp and coolant temp match when the engine is cold, and that they
stay reasonable as the engine heats up.
I would change the Accel Enrichment to be somewhere between 100% MAP driven to 50%. Your current TPSdot threshold is 0.0 %/s. I would suspect you are
getting many false acceleration event triggers, but without a datalog I can't confirm this. You will need to increase both the MAPdot and TPSdot
thresholds to above the natural jitter in the system.
I believe I have a MAPdot of around 100 kPa/s and a TPSdot of around 10 %/s. Depending on which code version you have installed, it may or may not
have the TPSdot scale bug fixed, which will affect your TPSdot values. At the moment you have AE RPM Scaling disabled (both set to 9000). As you get
the tuning nearer the mark, you might want to consider going back to something like 3000 RPM and 6000 RPM.
You say you have a LC-1 lambda sensor. What range is it set to? As factory default I believe it's set to 0V = lambda 0.5 and 5V = lambda 1.5
(AFR 7.4 to AFR 22.1). A popular setting is 0V = AFR 10.0 and 5V = AFR 20.0. The important thing is that your MS unit is calibrated correctly for your
LC-1 (and preferably checked against a proper gas machine).
Of lesser note, change the Battery Voltage Correction to some like 0.1 or 0.2 ms/V. Your warmup enrichment seems to be a bit up and down, and it drops
to 100% at quite a low temperature.
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brianthemagical
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| posted on 24/9/09 at 01:53 PM |
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Pretty much as above.
Only things i'd add are there's no need for fuel load of 125, 100 will be fine. And the pread could be a little better, the top 2 two bins
can be something like 85 and 100, with the bottom few start at 0, then 1, 3, 5, nice and tight to your cruising TP.
Your ignition advance also looks abitfrantic.
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matt_gsxr
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| posted on 25/9/09 at 08:48 AM |
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It might be an idea to indicate where you are (in the side-bar bit).
You may be surprised who lives around the corner with the same specification!
The pleasure from taking a car to rough and unhappy to a purring beast is immense, and with MS it (can) be almost trivial. I am sure if there is
someone local they will pop around at the weekend.
When is the SVA retest deadline?
Matt
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jonesier1
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| posted on 25/9/09 at 09:27 AM |
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im just the cornwall side of plymouth and sva dead line is next week.retest is tues pm at exeter . my fault for leavin it to the last minute.
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MikeRJ
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| posted on 25/9/09 at 11:46 AM |
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quote:
Originally posted by jonesier1
im just the cornwall side of plymouth and sva dead line is next week.retest is tues pm at exeter . my fault for leavin it to the last minute.
I notice you have enabled the secondary fuel load map as Speed-density ("Basic Setup | More Engine Constants" menu in MegaTune). This may
well be hampering your tuning efforts! Disable the secondary fuel load map for now, having dual maps makes tuning much more difficult.
If you are using a single throttle body and plenum induction, and you have a MAP sensor wired to your MS, then using Speed-Density for the fuel
control makes much more sense, and it will be easier to tune.
I'm in Plymouth, I may be able to pop over this w/e if you want but I'm not a megasquirt mapping guru, though I have some experience.
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jonesier1
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| posted on 25/9/09 at 01:32 PM |
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car is in wadebridge where i work so i can use co machine,i live in liskeard.
im in my own little world...its ok though they know me there
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