No start when warm

Tiny
PHILPRIDDY
  • MEMBER
  • 2010 VAUXHALL SIGNUM
  • 1.9L
  • 4 CYL
  • MANUAL
  • 130 MILES
I have the vehicle listed above CDI. I have no codes. Replaced cam sensor, crank sensor, and EGR. Was told may be ECU. Any help?
Friday, May 1st, 2020 AT 12:11 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Unfortunately we don't have a manual on your vehicle because it is not offered here in the USA. However the most common cause of this is a crank sensor so if you already replaced that we could still have a wiring issue. Do you have a scan tool to monitor the engine controller data? I am wondering if the ECM is seeing an RPM signal when this is happening. If when the engine is cranking there is an RPM signal the the sensor and wiring from the crank are ok.

After that we need to monitor fuel pressure when this is happening.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Again, due to not having a manual, I don't have a spec but we need to compare it to when the vehicle does start. So hook up the gauge and just tape it to the windshield so you can see it. Then start the engine and drive it around to get it hot. Then when it acts up what was the pressure compared to prior?

Let us know and we can go from there. Thanks
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Saturday, May 2nd, 2020 AT 9:19 AM

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