Ms tuning assistance

Postby **NitroDann** » Sun Apr 14, 2013 8:12 pm

It wouldnt start without req fuel at least 12.

Im sure the wideband needs calibrating also, unfortunately it is very very difficult to get to so we couldnt.

Something is wrong, like... it still doesnt have the 850cc injectors in or they arent 850 or something.

Im not used to 1.8Ls but do they usually run 2 squirts/cycle?

I got it to start and run a little but it wanted to run on 3ish cylinders and only revved cleanly occassionally.

Somethign basic is wrong id say.

I said move the WB02 bung so it can be calibrated and reload the base map and go from there, unfortunately there wasnt much else I could do with the time I had.

Dann

gslender · Postby **gslender** » Sun Apr 14, 2013 9:11 pm

If the reqfuel is 12 then they are not 850 cc injectors.

Can you get a log?

Is the harness stock and or normal?

G

Postby **NitroDann** » Sun Apr 14, 2013 9:18 pm

I live in newcastle and he lives in western sydney, I had an hour spare to help him so I cannot do anything now.

It was set to 2 pulses per cycle and needed a req fuel for stock injectors to run, and even then it needed huge fuel numbers to move under its own power.

Dann

sailaholic · Postby **sailaholic** » Sun Apr 14, 2013 10:51 pm

Na8 ran seq injection (one squirt) from the factory. Most 1.8 engine swaps I have seen retain the na6 control gear and hence run 2 squirts.

Postby **NitroDann** » Sun Apr 14, 2013 11:01 pm

it's an NB.

maybe it was an na8 map and that would explain a Lot.

Dann

manga_blue · Postby **manga_blue** » Sun Apr 14, 2013 11:15 pm

Slightly off topic but here is how to calibrate a wideband sensor in free air when you can't reach it:
1. Remove No1 spark plug
2. Remove oil filler cap
3. Look down oil filler hole and turn engine until exhaust valves on No 1 cylinder are open
4. Hold vacuum cleaner hose vaguely near exhaust pipe tip
5. Suck fresh air through No1 plug hole and on through whole system for 5 minutes
You now have clean air around the sensor.
(Alternate method is to shove air compressor jet at about 10psi down No1 plughole and blow instead.)

gslender · Postby **gslender** » Sun Apr 14, 2013 11:28 pm

I'm having trouble keeping up with what's in this engine... If it has 850cc injectors than the reqfuel must be set to 3.6!

If it was set to 12 then it would be way, way too rich, OR the injectors aren't 850cc.

Also, the number of squirts is irrelevant. MS2 will either halve or double the squirts and it really has no impact on sequential injection, which this engine is.

G

gslender · Postby **gslender** » Sun Apr 14, 2013 11:35 pm

Oh, and it should be set to 2 squirts for fully sequential injection.

Postby **NitroDann** » Mon Apr 15, 2013 7:34 am

Good idea magna!

grant I'm not concerned about whether the ms will auto halve the squirts I'm concerned that it's the right base map and that everything else was right.

Dann

elitee · Postby **elitee** » Mon Apr 15, 2013 7:36 am

Thanks for your help yesterday Dan.

Injectors are defiantly 850cc I will post up the flow sheet tonight that came with them, at 3.6 it definitely seems like it isn't getting enough fuel. Do the open/dead times need to be changed since they are low independent injectors ?

Sent from my GT-I9100 using Tapatalk 2

Postby **NitroDann** » Mon Apr 15, 2013 7:52 am

OMG lol.

Im pretty sure MS2 cannot run low impedence injectors at all.

Dann

elitee · Postby **elitee** » Mon Apr 15, 2013 8:05 am

Surely that cannot be the case... I have seen people running them on Ms.

Latency (Dead Time): 0.75ms at 14 volts

Sent from my GT-I9100 using Tapatalk 2

Postby **NitroDann** » Mon Apr 15, 2013 8:37 am

with resistors wired nine to increase the impedance.

Dann

gslender · Postby **gslender** » Mon Apr 15, 2013 8:38 am

If they are low impedance, you've probably damaged them.

Low impedance injectors require peak and hold circuits to correctly drive them. Not many ECUs support using low impedance due to the fact that you can buy big size high impedance injectors with the same characteristics.

Find out for sure what injectors you have, and maybe consider swapping back the stock injectors for now, until you can start and run the engine normally. Then swap in the big bad ass injectors with a tune that simply requires changing the ReqFuel to suit the injectors sizes.

G

gslender · Postby **gslender** » Mon Apr 15, 2013 9:31 am

I just checked the tune file again - it didn't have sequential injection enabled.

Under Advanced tab, Sequential Injection -> change from Untimed to Sequential/Semi-Sequential.

I'd also be concerned about those injectors, as again, if they really are 850cc then they'd flow almost 4 times as much fuel as a standard 240cc injector and require very, very small PW to fire. At a ReqFuel of 12ms it would be dumping heaps and heaps of fuel with the VE at 100%.

Something is wrong with them if you can get it to idle with a VE near 50% and the ReqFuel at 12.

G