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:

DTA S40 Pro Problems (like a Gremlin)

Post by corsaboy »

Hi everybody,

I’ve a strange problem. For 4 years now I’m running a S40 Pro on my supercharged c20xe Vauxhall engine. Till now without problems. We have been adding some NOS to the engine and got some small issues with the ignition.

This is how the setup always was.

C20XE Engine, with the following sensors:

Crank Sensor – Original Vauxhall
MAP Sensor- Bosch
Air Intake Temp
Water Temp – Original Vauxhall
Throttle Sensor – Original Vauxhall
Siemens 630cc Injectors
Vauxhall 1.6 16v Coil Pack (own AMP)

For the injectors the previous owner of the DTA and Engine Loom they used only 1 Injector Drive.

Because we wanted to use more Nitrous, we decided to replace the Original Vauxhall Coil for a MSD Ford style High Coil Pack.

I didn’t know that there was a different between them, now I know.. The MSD doesn’t have an AMP.

Well that was an expensive lesson, because 1 coil driver of my ECU is dead.
Alex will get this one this week to see if he can fixed it.

For now I’ve bought a new DTA S40 Pro.
I changed the engine config for the external AMP setting. After this the coil driver temp is ok..

But the engine doesn’t run like before. Lot’s of misfires and other problems. Sparkplugs become complete wet from fuel etc.

So I decided to change everything as it was. Uploaded the correct mapping still the same problem.

Well I started troubleshooting, got the engine loom out of the car and did a complete check of it.

Has checked every cable 3 times. It’s 100% ok.
Did a coil check, also working. Started the car with old spark plugs mounted, new plugs on the cover. Got a very good spark.

Have taken out the injectors, did an injector test with fuel pump on. This was good. All injectors are working as it should. None is hanging are whatever. Have enough fuel and the return of the fuel rail is also good.

The compression is good. All cylinders have almost the same pressure like other times (we measure this after every race). Also I double checked the timing of the engine. This is good.

I replaced the crank sensor now for two different sensors. All are working ok when I do a check in the DTAwin software. 58-2 I see in the test display.

Cylinder 2 is always running ok.
Cylinder 4 is almost always running ok.
Cylinder 1 and 3 give the most problems. Wet sparkplugs, not running as it should.

I’m completely out of options. Someone who can help me. I’m starting to think that the new ECU is not good. Because there are now no changes as for three weeks ago and the car doesn’t run correctly.

Cheers Marcel

Note:
My own DTA S40 has Hardware version 1.0 and firmware version V78
The new DTA S40 has Hardware version 1.01 and also firmware version V78
Vauxhall Corsa C20XE Powered by Eaton M90
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 »

you see 58-2 in the test 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 »

what I mean is the Crankshaft Oscilloscope function in the software.
I'll try to upload a picture of it this afternoon, i only have one on my laptop from the old results when i build the engine.
Vauxhall Corsa C20XE Powered by Eaton M90
Rob Stevens
Posts: 1247
Joined: Thu Jul 28, 2011 4:10 am
ECU Model: S100 Pro
Distributor: None-Coil On Plug :)

Re: DTA S40 Pro Problems (like a Gremlin)

Post by Rob Stevens »

I think what Stevie is suggesting is that the crank trigger should be 60-2 ?
I'm not sure how you can start the engine with the plugs on the cover?

I suggest finding a new coil like the ford wasted spark and carefully wiring that in to start a fresh.
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 »

Owh yeah it's 60-2. I see the value 58.
I'm now using the original 1.6 coil pack. Car has been running good without the NOS injection. Already changed it for one of the car of my wife. Same problem.

Also tested the sparkcables from another car.

Starting the engine is with the sparkplugs on the cover is easy. ENgine will not run but i checked if the sparkplugs have a good spark. That's all ok.
Vauxhall Corsa C20XE Powered by Eaton M90
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 »

If you let the ecu do a spark test ( not turning the engine over ), with the injectors all grounded properly...do you see a good spark on all plugs ?

And the only thing that has changed here is the coil pack ? Nothing else at all ? apart from a new ecu ?
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 »

With the coil test i get a nice and good spark.
Indeed changed the coil pack and also build it back as it was because of the problems.

Only check i will do now is the fuel pressure at the fuelrail.

So the only change at this moment is the ECU.
Vauxhall Corsa C20XE Powered by Eaton M90
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 »

If the above test is good, then wiring integrity and coil etc are ok.

Now remove the pin for ignition output 2 from the ecu, and test only ignition 1, ie cylinders 1 and 4 only, to check they are firing where you think they are.
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 »

They are firing like it should.
I also replaced the fuel pump for a brand new Bosch 044 (had it already) just to make sure the pump wasn't the problem.

I want to place a fuelpressure sensor and connect it to the DTA. Which one should i take?
Vauxhall Corsa C20XE Powered by Eaton M90
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 »

Any 0-5v sensor will be fine, or you could use one of the cheaper 2 wire sensors and wire with a pullup resistor.

I'm using one of these Honeywell sensors for cooling system pressure and so far it's working ok, I used one of what they used to sell for same thing for oil pressure and it's fine too. So their stuff seems decent quality

https://shop.vems.hu/catalog/honeywell- ... f391211314

I did spy these on ebay, from China. You take your risks with that one though

http://www.ebay.co.uk/itm/170980134449? ... EBIDX%3AIT

For a good quality KA sensor

http://www.jti.uk.com/product/10-bar-fl ... e-sensors/
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