mynew little rubber burner project,4wd/24v turbo/caddy

[powernut]

Originally Posted by foggyjames

Yeah, 13.5:1 AFR....I just wanna make sure you're not running that AFR when in boost...especially not above say 10psi. That's too lean...

I'm sure you have got it right (cos...well...you tend to do things right!)...but mapping is an art in itself, and the wording of your earlier post put me in some doubt, and I don't want to see you toast a bottom end after all this work.

cheers

James

how it works james once all the basic settings are set correct correct (tuck 1month to sort them all out and some settings i had to strip the engine to check lol,usely start on rich(idiol at 14.7 afr as it goes up the rev range u learn it off steadly my top is 12.1 afr in boost as if i had it say 14.7 it wont pull splutters, and smokes like a deisal ,,evern afer altering fuel/spark maps/ and basic setings of injector/wheel decoder settings unsure if u understand wont i mean, as all engines are differnert this staggerd v6 has to have 2percent more fuel to the rear clyinder then it dose to the front too for the amount of heat and runner lengh tubes , i also was messing with vvt system and wont a great idea i made a control unit to power and run these so a i can alter both cams electricly to either advance or retard the cams while the engine is runing , dosent half make a differnce too

[powernut]

couple more bits sorted ,
thought id best make the fuel flap work and make a spring clip as i lost the bugger, now works a treat


thought id rip door off as i had a solid one with good pins too

nice solid caddy door lol


may feel odd filling up at the other side of car

[foggyjames]

Don't worry...I'm well familiar with config and mapping of Megasquirt...we run MSnS-E on the 740...with up to 30psi of boost. I obviously got the wrong end of the stick from your earlier post...it just sounded like you were running dangerously lean in-boost...but I must have mis-read what you said.

cheers

James

[powernut]

Originally Posted by foggyjames

Don't worry...I'm well familiar with config and mapping of Megasquirt...we run MSnS-E on the 740...with up to 30psi of boost. I obviously got the wrong end of the stick from your earlier post...it just sounded like you were running dangerously lean in-boost...but I must have mis-read what you said.

cheers

James

nice james u might be able to help , as ive a problem which i carnt seem to sort , i can start run the vechical , and it will rev clean to 4000rpm and wont rev to the limiter set to 7500rpm , as soon as the engine hits 4000 the turbo will spool up to 9psi just by reving the engine and same applys when driving , also did a short data log test if u need to to see whati mean

[foggyjames]

Sounds like there's something funky going on with the timing. MS can do some weird things...like the old version we have (original 68000-series microcontroller) is known to retard the timing at the top end just because it can't crunch the numbers fast enough Yeah, post up a datalog and an msq, or email it to me (foggyjames(at)gmail.com).

cheers

James

[powernut]

frogy any idea why im having this problem , as ive used a 24v ms1 v3 map which runs fine on my friends car , after checking every setting there both idenical settings/same ecu/same board/version/ basicly when the vechical starts if i floor the acleter its like igition power is cuting the spark out ,at differnert parts of the rev range , im sure its a spark problem because if i crank the engine with the spark plugs removed im getting a intertant spark , i.e good to false to weak then good again ,ive tryed 6 differnert coilpacks/new ht leads, and still the same, only thing i can think maybe a crank sensor breaking down, or something in the ms unit which maybe breaking down as ive checked everything else ,any ideas

[foggyjames]

Hi Andy,

Sorry I haven't got back to you sooner. I got your email, and had a quick look. A couple of thoughts...
1) The battery voltage drops a bit low (to 6.5v at one point!), but I doubt that's it.
2) AFRs are a little bit lean, but nothing to get too worried about.
3) The spark map looks good, but the fuel table is obviously still a work in progress. Again, I don't think it'd be causing this problem...

It's behaving like the turbo is spooling against a rev limiter...like launch control.

Questions...
1) Does it have a boost limiter active? It should be under "Advanced" and "Overboost protection".

2) Have you checked that the timing is where it should be using a strobe?

I agree that it 'feels' like a trigger problem, rather than anything in the map / or another hardware problem.

What does it sound like? Does it misfire when it gets to ~4k, or does it just refuse to rev any further?

cheers

James

[powernut]

i went and checked the settings and there switched off , and unsure what has happernd but things have tuck a turn for the worst , i sent another msq to the ecu , as i was told (just chnge the injectors settings as i run the same setup and same ecu at 10psi ,) i thought all sounds good , so i did ,, the engine started reved up to 6000rpm and then suddernly splutterd , backfired blow a fuse and cut out , , thought ohh no ,didnt realise the spark wasnt set to inverted , it killed the ecu , but after checking i still had a switch 5v feed so , i re send a new firmware to the ecu , , but now when i try to start it , it constantly missis back fires , but odd thing is soon as i try to rev the engine the ecu dies /as in no power , then when i let the revs off , ec comes to life ,, so bloody confused , , i tryed to keep it runing in afashion and it blow another fuse (which was the injector/coil wire 12v fuse ,) , ive tryed more plugs/6coil packs/new leads and its still the same ,so im thinking maybe its back feeding from the injectors as ive heard low inpeance do odd things with these ecus, unlike most which run in high inpedance , like if there shorting to earth and killing the ecu power/

[foggyjames]

Bloody hell! Erm...given that I'm not far away, I'm tempted to suggest I come take a look sometime. We could be here a while discussing it here!

Are you running a resistor pack if the injectors are low impedance? We ran without one (by accident...Ryan neglected to tell me they were low Z, and I didn't measure them..), and it ran just fine. However....once we put the resistor pack back in the circuit...we needed to adjust the map *just a little*

So it idles....kinda ok...with a few backfires?
Try to rev it and it dies?
When exactly does it pop fuses?

cheers

James

[powernut]

Originally Posted by foggyjames

Bloody hell! Erm...given that I'm not far away, I'm tempted to suggest I come take a look sometime. We could be here a while discussing it here!

Are you running a resistor pack if the injectors are low impedance? We ran without one (by accident...Ryan neglected to tell me they were low Z, and I didn't measure them..), and it ran just fine. However....once we put the resistor pack back in the circuit...we needed to adjust the map *just a little*

So it idles....kinda ok...with a few backfires?
Try to rev it and it dies?
When exactly does it pop fuses?

cheers

James

lol cheers james ,right before the other msq was sent and caused all the problems , and now it has had firmware p0ped back on theres something causeing a dead short to the ecu ,//i.e ecu is dieing while trying to rev and wont evern start up right ,and it when it trys to , it will partly rev then the ecu will start cutting out causeing big back fires and cut out , ie spark intermitant ,evern fitted a new crank sensor and coil interfernce module, still the same,it will blow also blow a fuse which when i checked it is for the 12v feed which runs the coilpack and injector feed which will usely blow when the engines about to cut out on low rpm,the coil pack dosent have a reistor pack , as it direct coil drive , which 3 are built into the ecu ,so wounder if the problem is the injectors , going to earth