blitz acces with safcII questions

rage

rage

Lifer
after turning the fuel pressure down to 2.3 bars it does feel like the car behaves a lot better and pulls a bit better than with the safc, rrfpr@3 bar with stock ecu.

so there is some improvement to be noted, but compared to the price and the performance upgrade it were quite expensive horsepowers to be gained
 
Chris@CCM

Chris@CCM

Member +
hardcoreep said:
Had the same problem for a week. It would shut off at low rpms. It was adjusting. Should stop. If not, try the ECU on another car, if it behaves the same way the the ECU is probably damaged. Dose it still have the security stickers on it, unopened?

Toyota ECU doesn't have a multiple tables like a honda or a Nissan. It also has a check signal it uses for timing changes. If it doesn't get that signal it either throws an error or retains the timing value placed there.
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U talk of all this about the Toyota ecu I've seen with my own eyes on cars I've tuned with the emb timing is changed , some of the stuff I read on here r silly I don't go by any thing ppl say I go by what happends in the real world ! Some of the stuff I read about Toyota ecus is pure bull IMO
 
rage

rage

Lifer
anyone else know a few things about the high idle with the ecu? can't seem to get it right somehow
 
rage

rage

Lifer
fixed the high idle problem! turned out to be a bubble in my cooling circuit that was messing with my idle.
flushed the coolant and cleaned out the system with a water hose and refilled it afterwards and to problem is gone.

reset everything to stock and fitted the blitz ecu again to see how she runs now.
 
rage

rage

Lifer
aaaaand back to the drawing board.

thought i had fixed the problem but it's still there.

it's not the ecu, swapped for another ecu als problem remains.
flushed coolant system and thought i solved the problem but it returned after a bit of a drive.
thought it was the pcv valve, checken, swapped and that's not it either.

symptoms:

*start car*
rus fine, idle is normal.
start driving, warming up the car till cooling system and oil is at 80 degrees
idle remains fine
floor the car for a bit of a stretch (2 miles) and step on the clutch
idle bounces from 1k revs to 1.5k revs for a while and after about 30 secs it runs 2k revs steady.

odd thing is, i turn off the car and start it again, idle rises to 2k revs and then dies down to normal 1k and remains there.

after flooring the car for 2 miles again the same thing starts all over again.

i'm at a loss... anyone got any idea's?

doubt it has anything to do with the coolant because turning car off and on won't change the coolant temp in 3 seconds.
can it be a sensor fault? if so, which one?
 
rage

rage

Lifer
cable is fine, moves freely. i can drive the car without any problems. just when i floor it and the engine gets hot it happens. step on the clutch to let it idle and it bouces and eventually runs 2k revs.

what i can;t figure out is why turning the car off an on again cures it and goes back to normal, atleast till i put the engine to work again.

it's not the clutch itself either, car does it in neutral or any gear.

checked all the vacuum lines, doesn't seem to be the problem either
 
Fatman

Fatman

Member +
Why exactly did you buy the access ecu in the first place if you were successfully tuning using the OEM ECU + SAFC?
 
rage

rage

Lifer
mainly to see if there would be a notable diffrence. there is a bit of a diffrence compared with my safc/fcd/rrfpr/wideband setup but not worth the dough i'd say.

but back to my problem plz, it's driving me crazy cuz i can't figure out what could be causing it
 
H

hardcoreep

Member +
U talk of all this about the Toyota ecu I've seen with my own eyes on cars I've tuned with the emb timing is changed , some of the stuff I read on here r silly I don't go by any thing ppl say I go by what happends in the real world ! Some of the stuff I read about Toyota ecus is pure bull IMO
Click to expand...

I don't know how you are able to see the Toyota's ECU's timing, but I have a device that does, the TECHTOMS MDM-100. I have datalogged the ECU and changes to it. The SAFC will alter timing, the eManage will not. I'm not the only person to have seen this, several racers here have. If you have issue about what you've read about the Toyota ECU please enlighten us. I'm always willing to hear a different opinion.

I too have heard a lot of junk about Toyota ECUs, but I've been fortunate to have OEM data on my side. I don't speculate.

it's not the ecu, swapped for another ecu als problem remains.
Click to expand...
What ECU did u swap it for?
 
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H

hardcoreep

Member +
JasonGlanza said:
interesting to know too
Click to expand...

Because the SAFC is trying to trick the ECU into thinking there's less fuel via the MAP sensor signal, the timing then responds in relation to the relative MAP signal. The eManage when adding fuel, via the injector harness sends a signal directly to the injectors themselves to increase their duty cycle. The SAFC cannot increase duty cycle beyond factory specifications. Now when you're trimming fuel with the eManage BLUE you have to use the MAP sensor, this would theoretically change the timing, however the Toyota ECU uses a check signal for timing that the EMB kills. This is why when you use the EMB on certain Toyota engines you have to build the circuit as specified on Greddy's website to regenerate the signal.

From Greddy's documentation
Some Toyota ECUs (such as the 4AGZE and 7MGTE) expect a return signal from the Ignitor for each ignition signal sent. The expected IGf signal is a ground signal (from the igniters) in response to a charge signal (from the IGt ECU point to the iginiter)

Solution
There is an IGf Signal Generation Circuit within the Igniter which creates the IGf signal using a switching transistor from the same signal that is sent out of the igniter to the ignition coil. This circuit can be created external to the igniter and can be used to generate an IGf signal directly from the ECUs IGt signal before the e-manage intercepts (and alters) the IGt signal. Using this external circuit, the ECU is provided with a consistent IGf signal even if the actual ignition event is earlier or later than the IGt signal is triggering.
Click to expand...
 
R

RGM1800

Member +
thanks hardcoreep.

i have heard that

- on the rpm correction will advance the timing
+ on the rpm correction will retard the timing

is this true?
 
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