engine that starts when he wants

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.
destiny460
Posts: 20
Joined: Wed Aug 28, 2019 5:29 pm
ECU Model: S60 Pro
Distributor: Xap
Firmware Version: 86.02

engine that starts when he wants

Post by destiny460 »

Hello everyone

I'm french sorry for my English
I come to you because I have a problem that I can not solve

I explain the problem
i was driving and suddenly the engine stopped, she did not start again
the following days she started when she wanted
a shot she starts, she has her power, another shot it starts but does not go up in the turns / minutes
it is rare that it turns a long time, as soon as the engine starts the engine cuts directly after

when the engine does not crack, I am only the starter who turns
I have ignition, my pressure at the ramp is good
I wrote well "attempting to start" in green, the pmh oscilloscope looks good to me (I am not a pro)
but the engine does not crack

I change my pmh sensor and camshaft
check all my relays
check all the probes
my engine compressions are ok

is it possible that his come from the calculator? I have a DTA S60
or so of my car
it looks a little like an anti-start, but I'm not on my car

thank you for your help :D
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: engine that starts when he wants

Post by stevieturbo »

If this happens often, can you datalog the event happening ?

When it stops, can you stop the car, leave the ignition turned on, and verify the ecu is on, or off ? Or can you keep a laptop connected to monitor the ecu and sensors when this happens ?
destiny460
Posts: 20
Joined: Wed Aug 28, 2019 5:29 pm
ECU Model: S60 Pro
Distributor: Xap
Firmware Version: 86.02

Re: engine that starts when he wants

Post by destiny460 »

at this moment it does not start, but yes how can i datalog the event ?

when it stops, the ecu i on, I have my pc connect to the ecu
when it does not start, I have each time "Rejected crank pulses" and "Crank wheel teeth errors" in the page Engine diagnostics

thanks for the help
Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: engine that starts when he wants

Post by Alex DTA »

As it's suddenly happened, it sounds like a wiring issue.
Check all the grounds to the ECU, especially the one on the ECU case, are still connected properly.
destiny460
Posts: 20
Joined: Wed Aug 28, 2019 5:29 pm
ECU Model: S60 Pro
Distributor: Xap
Firmware Version: 86.02

Re: engine that starts when he wants

Post by destiny460 »

Genial thank you are genies
problems resolved, calculator mass was failing (bounds 13 and 14)
I have it directly grounded battery, no more problems

Thanks for your help
destiny460
Posts: 20
Joined: Wed Aug 28, 2019 5:29 pm
ECU Model: S60 Pro
Distributor: Xap
Firmware Version: 86.02

Re: engine that starts when he wants

Post by destiny460 »

Hello

I shouted victory too fast
it lasted a week and she does it again

now she starts all the time
but when she is hot, she stops suddenly
either she reboots well and cuts
either it starts but no longer goes up in the towers

I moved the masses many times, I rebuilt a mass on chassis, always the same
the mass on ecu is well connect the same for the other mass

thanks for your help
Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: engine that starts when he wants

Post by Alex DTA »

Are you getting any crank sensor errors in the diagnostics?
destiny460
Posts: 20
Joined: Wed Aug 28, 2019 5:29 pm
ECU Model: S60 Pro
Distributor: Xap
Firmware Version: 86.02

Re: engine that starts when he wants

Post by destiny460 »

most of the time no, it cuts and does not display an error

but sometimes yes I have
Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: engine that starts when he wants

Post by Alex DTA »

If it's cutting out without throwing any errors, you either have a fueling compensation kicking in, or you have a loose wire somewhere on the output side.
destiny460
Posts: 20
Joined: Wed Aug 28, 2019 5:29 pm
ECU Model: S60 Pro
Distributor: Xap
Firmware Version: 86.02

Re: engine that starts when he wants

Post by destiny460 »

everything is well cabled

after best observation, she cuts when she is hot , cold it works nickel
especially when the oil rises in temperature, it cuts and when I restart it works in degrade mode
yet I am not an oil temperature sensor connected to the ecu
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