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Vx On Itbs Not Starting


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#21 techieboy

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Posted 18 November 2019 - 08:04 PM

Given you're on a (half) decent aftermarket ecu and you've just made a new loom, why aren't you using individual coilpacks?

#22 quimbles

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Posted 18 November 2019 - 08:10 PM

At least we can plug it in now lol.

Zinc passivated mild steel.

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#23 Mat Jackson

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Posted 18 November 2019 - 09:29 PM

What material is the 36-1 made from? Just a thought.


Wheel is steel, so should work.




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#24 Mat Jackson

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Posted 18 November 2019 - 09:30 PM

Ah great that's good to know

There's also a trigger sync test in the software, have you checked that?


Yeah, found that. Software is showing the trigger wheel syncing. The software has been a great help in helping diagnose and rule things out!!


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#25 quimbles

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Posted 19 November 2019 - 05:15 PM

If you need me to check any readings on the ECU just let me know

#26 Mat Jackson

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Posted 19 November 2019 - 05:55 PM

If you need me to check any readings on the ECU just let me know


Thanks..


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#27 Mat Jackson

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Posted 19 November 2019 - 08:31 PM

So..... It’s not the coil pack ☹️☹️☹️


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#28 Mat Jackson

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Posted 24 November 2019 - 03:52 PM

Another look today and I have confirmed there is a spark (coilpack on top of engine when cranking and each plug sparking)

I can smell fuel, but how can I confirm I have it (plugs are wet which is what I expected)...

If I have fuel and spark, I guess the only thing it can be is timing?


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#29 quimbles

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Posted 24 November 2019 - 06:18 PM

TPS? Think that's the only other one left

#30 Mat Jackson

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Posted 24 November 2019 - 07:08 PM

TPS? Think that's the only other one left


TPS is ok on the software (it’s only 6 months old)


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#31 quimbles

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Posted 25 November 2019 - 09:26 AM

you can pull the fuel rail open on one of the clips to see if there's fuel........ its a bit messy mind!  just prising it open a little will do.  ive had a leak there before when its running.

 

there ant that many sensors it can be, totally baffled!

 

i feel your frustration.... my car has a misfire.  I left it out in the rain the other week tho, so im hoping its the obvious fix.

 

 



#32 Mat Jackson

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Posted 26 November 2019 - 09:20 PM

Another hour in the garage tonight playing with the crank position sensor. Software showed it syncing regardless of which way it is plugged in, and will also show syncing if a different trigger wheel is selected (as long as it’s not too dissimilar). Also tried a new sensor, but same outcome....

So, latest thinking is trigger wheel / timing...


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#33 quimbles

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Posted 26 November 2019 - 09:58 PM

You tried putting 90 and 270 in the offset. Although I don't think it'll except 270. Maybe turning the sensor round...unsure

Edited by quimbles, 26 November 2019 - 09:59 PM.


#34 quimbles

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Posted 27 November 2019 - 09:39 AM

Now this is probably total b0llocks.

Does the circumference of the trigger make any difference?

Also had a random problem at the start where the software didn't prompt for the ECU type and it didn't install the right firmware.

Anyways it has to be the trigger!

#35 ginek

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Posted 27 November 2019 - 10:35 AM

You tried putting 90 and 270 in the offset. Although I don't think it'll except 270. Maybe turning the sensor round...unsure

 

This. It's was my problem when installed ITBs first time. I installed trigger wheel with the wrong offset, signal was totally OK, but no the phase.

No start. Probably you can even configure offset in the ECU software.



#36 Mat Jackson

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Posted 08 December 2019 - 05:08 PM

Still wasn’t running, so put my old alpha ecu with stage 1 map on and it wouldn’t run either!! Then fitted gaffers old alpha ecu with stage 2 map and she ran fine!!

Looks like the stage 1 map was far enough off to not even start the engine!! Who would have thought there would be that much difference!!


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