reversed map(back to front)

alfa boxer · Post by **alfa boxer** » Tue Jun 05, 2007 3:05 pm

Hello ,can some one please help me with the mjlj .i have fitted it to the car and every thing works fine apart from one really anoying fault . my map is back to front .when viewed from the edit ignition configuration my numbers go down from the front backwards unlike all the other maps.It works fine but looks wrong. Any ideas!!!!!! Thanks lee

Post by **brentp** » Tue Jun 05, 2007 3:23 pm

Hi,

Does your edit map configuration look like these screen shots?
http://www.autosportlabs.net/MJLJ_Confi ... n_Software

RPM axis low -> high = left -> right

Load axis low -> high = top -> bottom

if so, then that is correct- that is by design..

Regards,

alfa boxer · Post by **alfa boxer** » Tue Jun 05, 2007 4:06 pm

Thanks for your quick response.the two pictures ive attached will show you more clearly what i was trying to describe.

MartinM · Post by **MartinM** » Tue Jun 05, 2007 4:37 pm

I think it might work even better the other way!

If you have a TPS, the higher rows should be for closed throttle (top row = throttle closed) and these should be bigger advances than the rows below

If you have MAP, the higher rows should be for biggest vacuum (top row = throttle closed) and these should be bigger advances than the rows below - the way I remember is that everyone knows about the "vacuum advance" pipe that falls off the dizzy i.e more vacuum = more advance

Post by **brentp** » Tue Jun 05, 2007 6:07 pm

If you are indeed running TPS then the higher numbers, going towards the bottom, represents a larger throttle opening.

It seems you might have an older firmware and configuration software. The new 3.2.1 firmware really benefits TPS users as it supports TPS calibration, which transforms the Load Axis into a TPS open percentage. In other words: after calibration is performed, the TPS value of 50% represents your throttle being open 1/2 way.

You can find the firmware upgrade instructions in the wiki ('how to' link at the top).

alfa boxer · Post by **alfa boxer** » Tue Jun 05, 2007 7:28 pm

Thanks for the advice . So what your saying is the tps is wired in reverse and i should have a high tps reading when the throttle is closed as apposed to low when closed? yes!!!!

Post by **brentp** » Tue Jun 05, 2007 8:59 pm

Hi,

Sorry for the confusion! The correct way is: smaller TPS value = less throttle.

Example:

Throttle closed = smallest TPS value
Throttle wide open = highest TPS value

With the 3.2.1 firmware, you can calibrate actual TPS%, So...

TPS 0% = throttle closed
TPS 50% = throttle 1/2 way open
TPS 100% = throttle wide open

Does this help?

Thanks,

alfa boxer · Post by **alfa boxer** » Thu Jun 07, 2007 9:31 pm

Hi chaps, you were correct my map was the wrong way round, thanks to a so called rolling road technician, so called Alfa Specialist! Now that's enough ranting from me.

Question: For maximum adjustment (i.e. the ten load bins) my car runs 36 degrees of advance after 3800 revs. What would happen if I set the last speed sight to say 3800 revs. My car will rev happily to 6000 revs, will it read 36 degrees after 3800 revs.

Thanks for your help. Lee

MartinM · Post by **MartinM** » Thu Jun 07, 2007 9:56 pm

Yep - will use 36 degrees at anything above 3800 rpm....

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reversed map(back to front)

reversed map(back to front)

mapping

TPS

mapping