I'm a bit concerned my P8pro is goosed

This section is dedicated to discussion of DTA engine control units such as the DTA E48 EXP, P8 Pro, DTA S40, S60, S80, and S100, as well as all things ECU related.
Post Reply
DiscoPotatoes
Posts: 52
Joined: Fri May 04, 2012 2:51 pm
ECU Model: P8 Pro

I'm a bit concerned my P8pro is goosed

Post by DiscoPotatoes »

Hi All
Whilst tweaking the start fueling map it decided to not fire up. After the Third start.
After a bit of investigation I seen to have lost fuel and Spark signals.
The crank sensor is sending a signal and there is 12v to the coils but no 12v to the injectors.

The map seemed to be corrupted as there was some odd numbers in the general engine settings. So I installed a good map but it still won't fire, I'm a bit concerned it burn out one or more of the outputs
Thanks for any help in advance
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: I'm a bit concerned my P8pro is goosed

Post by stevieturbo »

12v at injectors or coils comes from your wiring, not the ecu.

Do you have ecu comms ?

Do all sensors appear to read normally when connected ?

Does fuel pump prime as normal on power on ?

Do you get an rpm signal when cranking ? How does such info appear on Diagnostic screen during cranking etc ?
DiscoPotatoes
Posts: 52
Joined: Fri May 04, 2012 2:51 pm
ECU Model: P8 Pro

Re: I'm a bit concerned my P8pro is goosed

Post by DiscoPotatoes »

stevieturbo wrote:12v at injectors or coils comes from your wiring, not the ecu.

Do you have ecu comms ?yes

Do all sensors appear to read normally when connected ?yes

Does fuel pump prime as normal on power on? yes I'm getting good fuel pressure at the rail and both fuel pumps are working when the immobiliser is switched off[/color]

Do you get an rpm signal when cranking ? yes it's shows an ac voltage on my multimeter How does such info appear on Diagnostic screen during cranking etc ?yes it shows about 150 rpm on the real info page
Rob Stevens
Posts: 1244
Joined: Thu Jul 28, 2011 4:10 am
ECU Model: S100 Pro
Distributor: None-Coil On Plug :)

Re: I'm a bit concerned my P8pro is goosed

Post by Rob Stevens »

I assume the coil and injector test doesn't work either.
Try hooking coils/injectors up to any spare outputs you have to confirm if the output drivers have failed.
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: I'm a bit concerned my P8pro is goosed

Post by stevieturbo »

So then you need to investigate why the wiring on your car no longer provides 12v to the injectors.

That is a wiring fault with the vehicle, nothing to do with the ecu
Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: I'm a bit concerned my P8pro is goosed

Post by Alex DTA »

You can also see if the ECU is getting a crank signal by looking for the RPM while cranking in the diagnostic display.
If there is no RPM, there will be no output from the ECU.
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: I'm a bit concerned my P8pro is goosed

Post by stevieturbo »

It appears he has an rpm signal ok.

Eveything being said points to a fault with the vehicle wiring, not ecu related.
Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: I'm a bit concerned my P8pro is goosed

Post by Alex DTA »

stevieturbo wrote:It appears he has an rpm signal ok.
So it does.

Carry on. :lol:
DiscoPotatoes
Posts: 52
Joined: Fri May 04, 2012 2:51 pm
ECU Model: P8 Pro

Re: I'm a bit concerned my P8pro is goosed

Post by DiscoPotatoes »

stevieturbo wrote:It appears he has an rpm signal ok.

Eveything being said points to a fault with the vehicle wiring, not ecu related.
Thanks Stevie your a star.
I retested all the relays and fuses on the ecu/ fuel pump circuit and found one of the terminals not providing 12v. Swapped out the relay and it started.
Thanks for pointing me in the right direction
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: I'm a bit concerned my P8pro is goosed

Post by stevieturbo »

Good stuff.
Post Reply