DTA S40 Pro Problems (like a Gremlin)

Discuss issues and tuning software like DTASWin, E-Race, MegaLogViewer(DTA), etc. Also post archive versions of firmware.
corsaboy
Posts: 70
Joined: Tue Jul 26, 2011 10:55 am
ECU Model: S40 Pro
Firmware Version: 79
Location: The Netherlands
Contact:

Re: DTA S40 Pro Problems (like a Gremlin)

Post by corsaboy »

The mate, so if i use the 3 wire sensor, i don't need the pullup resistor.
just connect the sensor to the 5v, sensor ground and pin 33 of the S40 (analogue 3) and it will work :)

The car is drive me crazy at the moment..
Also got another DTA S40 ECU (both from the new batch).

Now the cars runs more often on all cilinders. Now i've also more often power.
Can't find out why it's doing this...
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stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: DTA S40 Pro Problems (like a Gremlin)

Post by stevieturbo »

yes, 5v, sensor ground and signal.

If you had an oscilloscope you could monitor the coil outputs to see if they are dropping out for some reason.

it would be very unusual though as a fault.
corsaboy
Posts: 70
Joined: Tue Jul 26, 2011 10:55 am
ECU Model: S40 Pro
Firmware Version: 79
Location: The Netherlands
Contact:

Re: DTA S40 Pro Problems (like a Gremlin)

Post by corsaboy »

Today checked to fuel pressure at the fuelrail.
I have Always 3bar pressure @Fuel pump test, starting the engine and while the engine is running. As far you can call it running..

Also did a triple check at the timing. This is all ok.

Did again a compression test. All cilinders are ok.
Checked the Original intank fuel pump. I've always at least 2liter fuel in the swirlpot in the enginebay for the engine fuelpump and nitrous fuelpump. The nitrous pump is not running while testing the last weeks.

I'll upload some pictures of the cranksensor results.

The engine has run this evening for a second of 4 like the good old times. After changing the oil.. We have been starting very lot so i didn't trust the oil anymore (it was only 2 month and maybe 20-40km old)
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corsaboy
Posts: 70
Joined: Tue Jul 26, 2011 10:55 am
ECU Model: S40 Pro
Firmware Version: 79
Location: The Netherlands
Contact:

Re: DTA S40 Pro Problems (like a Gremlin)

Post by corsaboy »

Ok also some pictures from the scope function of the DTA:

These are at a higher rpm:
Image

Image

Image


I had one also from while starting the engine. Can't find that one back as export on my laptop. I found one from the date i build my engine (back in 2010). This test results is the same as the one now:

Image
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corsaboy
Posts: 70
Joined: Tue Jul 26, 2011 10:55 am
ECU Model: S40 Pro
Firmware Version: 79
Location: The Netherlands
Contact:

Re: DTA S40 Pro Problems (like a Gremlin)

Post by corsaboy »

Okay, it's time for a big update.
Coil is wired the right way. triple checked it today.

The engine was running on brake cleaner, so I decided to test the injectors on an other fuel rail. The are all opening the same time and have the same amount cc injected in some cups.

So I've replaced the fuel rail and fuel pressure regulator.
This time i placed back my adjustable version and did adjust it to 3bar (43PSI).

Still not running on fuel, but running on brake cleaner like hell..
On fuel nothing, when I open the throttle, lots of misfires etc.

Well just to checked everything, i disconnected my throttle sensor.
In my mapping the error value for the TPS is 100%

After i did this the engine was running idle.
I connected the TPS again and the engine directly stopped running.

I adjusted the first parts of the fuel mapped, originial values have been around the 0,87 for about 4 years.. Now i need 4 - 4,2 in the main fuel map to let her run..

WTF happend with my injectors?

My old DTA has been checked by Alex, we hoped that only the coil drivers were damaged. He noticed some strange behavour on the injector drives..
He could only repair my old ecu but replacing the system board. This is done and i tested the ecu today. Worked just like my other new ECU.

Thanks to Alex for the quick service!!!

Someone a idea about my injectors. Did i broke them with the old ecu?
They still have an impedance of 13-Ohm :S
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stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: DTA S40 Pro Problems (like a Gremlin)

Post by stevieturbo »

Could you previously have had 2 stroke selected for injector firing ?

Are you sure there arent any compensations being applied now, that were not previously, or visa versa ?

What size are the injectors ? And when it is idling, what is the actual injector pulse width as viewed in real time display ?
corsaboy
Posts: 70
Joined: Tue Jul 26, 2011 10:55 am
ECU Model: S40 Pro
Firmware Version: 79
Location: The Netherlands
Contact:

Re: DTA S40 Pro Problems (like a Gremlin)

Post by corsaboy »

I've checked all the old maps..
No changes in it with the current map.. Only now that i've changed the fuel map in idle range..

I've only a compensation on battery, water temp, air temp and map
All these respons the same way as before, all sensor value's are valid.

So after i blew up my old ECU (hardware version 1.00) i've placed now three different Ecu's:
two with hardware version 1.01 and one (the one i got back from alex) with hardware version 2.00

I use the Siemens Deka 60LB (630cc) injectors.

I need to check the actual injector pulse width.."
Will try to check it tonight..

I can send you the mapping if you want to check it..
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Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: DTA S40 Pro Problems (like a Gremlin)

Post by Alex DTA »

When testing, do a test with battery compensations on, and again with them off. See what this does in the real time display.

Also check your TPS is functioning correctly.
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: DTA S40 Pro Problems (like a Gremlin)

Post by stevieturbo »

A pulse width of 4ms sounds incredibly high for 600cc injectors on a 2.0

Definitely check what real time display says, as that's what the injector should actually be seeing.
corsaboy
Posts: 70
Joined: Tue Jul 26, 2011 10:55 am
ECU Model: S40 Pro
Firmware Version: 79
Location: The Netherlands
Contact:

Re: DTA S40 Pro Problems (like a Gremlin)

Post by corsaboy »

indeed, i use 4ms in the high RPM table so for idle it is too much..
normal i had 0.87 ms for idle.

The TPS is working correctly. values are 100% ok
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