Saigon_Bob

iTrader: (2)

So i got her running last night!

First time using a MS. look below for the mods.

Anyways the timing was a lil advanced a guess and she kicked back on the starter and broke it hahah... will be the 64909 time...

anyways she barely holds and idle ( i think loadin up on fuel, if i hold around 1500 -2000rpm she will run decent and then wanna die out so i have to pedal)

The afr's are kinda rich for idle too about 11-13:1 and sometimes 9:1 and she stinks lol... needa do some tuning... but where to start? i been reading so much my head is doin circles!

The throttle response is so crisp and throaty tho... mmm mmm good.

I reflashed the MS to the MSII extra firmware. I cant wait to stand her on the two step!

Toehead

Congrats buddy!


The megamanual has a pretty good guide to tuning. You have a wideband so that really really simplifies the process.


You should probabaly talk to jim... He's a wiz at tuning and he can probably give you an AFR table for autotune that will get you pretty damn close to where you need to be.

Saigon_Bob

iTrader: (2)

Yea the megamanual has so much info its got me spinning.... I gotta say i always get the butterflies when starting her up after a project! I love it.

The harness i have has a shielded IGN wire and at first she wouldnt start so i was like waiiit how did i wire that lol...

I need to get the starter fixed but yea im excited as hell to get her on the go.

Whats jim's username? so i can message him, i find it funny with as many ppl there are with a megasquirt finding written info is easy but an actual person to explain things is a bit more difficult.

Specifically the spare port settings and a few other what-nots that i wanna play with after she's running straight.

It's unfortunate that my hands aren't true enough and my soldering skills suck, i woulda loved to build the board. ( may try it on another ). for what ever reason since i was younger my hands shake like no ones business... model buildin,etc is hard lol

Toehead

That's his username, jim


Also, Lance
(also his username) is very good as well... he wrote a lot of the manual.


I just checked and it doesnt look like jim has been on for about 5 months... hope he's alright...

Saigon_Bob

iTrader: (2)

Yea last i saw jim was doing something with the sequencer project... i'd love to get my hands on that but one thing at a time...

Saigon_Bob

iTrader: (2)

news.... got her idling steady ( finally.. ) and base timing is set.

she dies if i give gas and has a hot start issue lol... ahhh tuning... its addicitng... all i look forward to is coming home to play.!!

spills

iTrader: (9)

awesome man, how did you work out your idling issue? Im still scratchin my head over why I have 0 throttle response. You have a WB 02 correct? have you tried the autotune feature, or can you not get a reliable tune to at least drive it around?

EDIT: Just for S&G, how are yall firing your injectors, alternating or sequential? And how many squirts? Just curious if the TPI works best with one or the other

Toehead

I forget the number of squirts off the top of my head.

Spills, throttle response once you have a good cruising tune is all about acceleration enrichment. Take a serious look at that, and all the tip in problems will dissapear

edit... Seeing how i've been through this all before (only minus the wideband)

If you have ANY questions I'll do my best to help you guys out.

For the hot start problem, play around with cranking pulsewidths vs coolant temp and also the after start enrichment. (this is assuming that warm up enrichment is already finished.)

edit #2-
Mine is bank fire, alternating. It runs really well in this configuration. You would think the car has a stock computer with the way it runs.

spills

iTrader: (9)

ya, i think I may have put in the wrong amount for req_fuel. It feels like a cold carb'd motor with no choke. It may even be an IAC issue, or VE tables calibrated incorrectly. Soon as I get my WB O2 installed, Ill gonna dive into it

Toehead

Yes, the wideband will let you know right away where you stand. I had an advantage with a mostly stock motor, I was able to draw on the stock VE tables for a lot of inspiration.

Saigon_Bob

iTrader: (2)

slowly... ha.. I figured out i had alot of settings off... in the configurator my EGO was on narrowband, and i have a wideband. and i needed to set up the fueling ( which was hard untill i figured out a trick to determine if you need more fuel or less, If you need to give it throttle to start it or keep her alive more than likely a bit rich. if nothing helps ur lean. but thats a generalization)

i have the base timing dead on and have the FIdle set up to ground a relay after 300rpms is seen to trigger ECU advance.

still dies if i give any sort of throttle input lol...

Saigon_Bob

iTrader: (2)

I have mine on alternating 4 squirts with the injectors wire up 1467 on INJ1 and the rest on INJ2

the req fuel for my set is like 19.2 upper and 9.6 lower box.. i dont know if thats too high... right now she idles at 5mSec


as for the HOT start issue i've been adding alot of fuel to the ASE and WUE tables and it seems to help ( it starts in the first few cranks, catches and then almost immediately dies..)


Also spills double and triple check the VE tables... i have noticed a couple of times that they get all messy for what-ever reason ( i mean the RPM bins end up jumbled so that its like 500, 2000, 1500, 4000 etc and that the VE numbers are all haywire)

Toehead

Bob, you're using fidle output to control the timing relay?

I just did the same thing with a hot in run and not in crank power source. Lets me use the fidle to control the electric fan instead

Saigon_Bob

iTrader: (2)

My body harness was gutted when i went to carb ( i got a bit to cut happy ) so there are few wires in the engine bay and didn't feel like going thru all the trouble to find a suitable signal. Eventually I will redo it but it works for now.

I was half inclined to use the starter signal to supply 12v during cranking but decided against going that route because i would need it to ground afterwards, does the starter signal do this? ( second thought if i wire it up like i think it will keep the starter on all the time... and that wouldnt be good)


UPDATE: I got her running and idling better now. Seems that i forgot about the pump i had on the frame from my carb days.... lol a bit of restriction... Tried to cruise around my block and all was going well untill the WUE shut off and the car died... ended up pushin her back to my house.

This would lead me to believe the base VE table is too lean?

spills

iTrader: (9)

Try and get a datalog and check to see of your AFR jumps once WUE turns off. Have you let the car get to oper. temp just sitting in the driveway w/o driving? See if shuts off then, and if it does you dont have to push her back home

Saigon_Bob

iTrader: (2)

Yea, I am currently diagnosing it.... this sucks... it seems to idle forever.. but wont rev past about 2k or 3k once up to temp and then dies and wont restart.....

making me mad as hell. The AFR's are fat 11:1 or 12:1 untill it dies where its instantly 21:1

Im not sure whats happening but it seems to have something to do with being at 185* degrees or more.

for all i know my MSQ is way off....
----------
also i got her to run after the WUE turns off so i know its not that

kowboy59

iTrader: (8)

i had a similar issue. i could drive teh car around and all but after 15 minutes or so of driving it would shut off. i could however get it started right back up.


My problem was that something in the ms(wasnt getting a proper reading)was not fully functional and it was killing the motor. never found out what it was.

Saigon_Bob

iTrader: (2)

i hate you brad.... lol. you never told me that. im glad your carb set up is running good.

Toehead

Lame....

Do any of the readouts except AFR change? Do the commanded pulsewidths stay the same?


If they do, and it is most likely something in the injector control circuit. Maybe one of the FET's is not within spec. The guys at DIY autotune can sell you new parts and are damn good troubleshooters

Saigon_Bob

iTrader: (2)

Lol i put gas in her and she hasnt given me trouble yet.

been datalogging and running her a bit... drives nicely... doing to work 22miles one way. on freeway. wish me luck!

Toehead

Good luck bro!


It's funny how cars need gas to run

Saigon_Bob

iTrader: (2)

I know right.... who woulda thought that she was running into air pockets or something... had about 1/4 to half a tank... lol the wally likes fuel i guess..



1/2 tank or more for me now