ECU Tunes and Installs

[ROBAPHENT]

Ask who your selected tuner prefers, and tell them the features you want/need.

SM4 is about 40 years old, so it's pretty low on most peoples lists now days.

Dam, not bad for a 40 year old ECU that can do fly by wire. must of been ahead of its game.... the only issue is inputs/outputs really it does everything else with no issues my tuner is autronic guru. so i would find a new turner but knowing me i will just stay with the sm4 and just deal with not having all the input/outputs

[E-Z]

Jason, what's the jewest way to trigger a 7th injector on a v6? Hobbs switch and pulse from existing injectors?

[Slides]

Got a spare digital output?

What ecu?

[crack]

Jason, what's the jewest way to trigger a 7th injector on a v6? Hobbs switch and pulse from existing injectors?

assuming you don't have an aftermarket ecu, then IMO the options are in order of tune-ability:
1. very cheap second hand aftermarket ecu and use that for the extra injector / errything
2. duty cycle switching with this: http://www.autospeed.com/cms/A_2471/article.html
3. on/off switching with a pressure switch (if boosted) or this: http://www.autospeed.com/cms/article...witch&A=113008 (e.g. monitoring TPS)

[E-Z]

assuming you don't have an aftermarket ecu, then IMO the options are in order of tune-ability:
1. very cheap second hand aftermarket ecu and use that for the extra injector / errything
2. duty cycle switching with this: http://www.autospeed.com/cms/A_2471/article.html
3. on/off switching with a pressure switch (if boosted) or this: http://www.autospeed.com/cms/article...witch&A=113008 (e.g. monitoring TPS)

yes jerry rigging a stock h25a for beach woosh rooster tails
thankyou. piggyness doesnt matter as long as its somewhat durable.

[Slides]

Boost switch, pressurised tank and air atomiser pre-turbo? Can mix your choice of alcohol(s) and water for power and temp control?

Off the shelf complete kits for $400 iirc.

[Jason Broadhurst]

I assume it's because of turbo and no ECU?

Adjustable FPR will do most of what you want, plus -5/10 degrees base timing. It's rough but works just fine.

[trdee]

Helping out a friend last night. He has a haltech elite on a 2GRFE in an SW20 MR2 race car. The thing wouldn't fire and he suspected the timing and wanted to stick a timing light on it when cranking. I noticed that the timing light was flashing only intermittently so got him to log some data.



Now, I don't really know haltechs very well, and I don't know the elites at all, but from what I could tell the rpm trace looks fine so I assume the crank trigger is working. However the "trigger synchronization" seems to be doing funny things, and i noticed that the "trigger system errors" trace seems to follow the points where the timing light stopped flashing, the trigger tooth count also is more jittery than i would have assumed it should be, but again I dont have a frame of reference with these ecus.

Would the trace above possibly indicate that the cam reset isn't working properly?

Also full disclosure, the wiring on this car is aids. I've told him he probably needs to pull it apart and start again




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[Jason Broadhurst]

TARDEE (LOL)

If you go to the pull-down menu View -> Load Page and then load "diagnostics" it will show you the real time trigger count registers within the ECU.

RPM is calculated (for display) off of only one of the triggers, so it isn't really a reliable source of diagnostics to just witness ESP showing/logging RPM.

Being toyota, it likely has the 24+1 or 24+2 system for CAS along with reluctor sensors yeah? If so, may I suggest investigating the triggering threshold settings, and setting them to similar voltages as found here within the bottom right table on sheet 2 (MOTEC triggering settings

That could be a factory Haltech loom. They solder the sensor earth during construction in the factory. Less than ideal, but we shouldn't start the whole solder vs crimp debate (because I solder on occasions HAH)

[trdee]

thank you mr butthurts next time im over there ill check out the diags tab

i believe the engine runs separate crank trigger and cam sensors? will look into it

and yeah im not even talking about the earth, more the mess of wires cut and joined randomly, and what looks like exposed power wires etc

[Jason Broadhurst]

The triggers should increment in multiples of 24, then reset to zero. if they are going above 24, you have a home problem. If they are going below, you have a ref problem.
Home being the cam reset per 2 revolutions
Ref bring the 12 tooth wheel on crank, counting twice per home reset.

[Jason Broadhurst]

and yeah im not even talking about the earth, more the mess of wires cut and joined randomly, and what looks like exposed power wires etc

Get some tape on that stat :D

24+1 references the ref counts per home counts (24 pulses from crank and then 1 pulse from cam).

[elfturbomax]

That engine doesn't have 24+1. Try 36-2 for crank and 3 equal spaced falling edges for each cam.

[JZK25]

Yep 36-2 crank and 3 on cams. Reluctor on crank and some have reluctor cam and some hall on cam. Is it quad VVTi or dual?

[trdee]

i didnt look too closely but i seem to remember seeing what looked like two vvt solenoids on each cylinder head

thanks for all the tips gents. will do some further digging next time oldmate wants to look at it again