Zero fuel rail pressure with ignition off.
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Zero fuel rail pressure with ignition off.
I have an adjustable fuel pressure regulator fitted with a pressure gauge. Before fitting the MS, this would show some pressure for hours after the engine was stopped. Now it goes immediately to zero. Is this some quirk of the MS - or has a fault developed? There are no fuel leaks showing - or smelling.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
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Matt Cramer
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- Joined: Sat Jul 03, 2004 11:35 am
Re: Zero fuel rail pressure with ignition off.
Make sure the injectors do not get power when the ignition key is off. Some cars are wired like this from the factory, and in that case the MegaSquirt can hold them open when the engine shuts down.
Re: Zero fuel rail pressure with ignition off.
In this case they are wired from the main relay which is controlled by the ignition - same as the original setup.Matt Cramer wrote:Make sure the injectors do not get power when the ignition key is off. Some cars are wired like this from the factory, and in that case the MegaSquirt can hold them open when the engine shuts down.
I didn't think it was possible for tne MS to do this without having some magical internal supply - but just checking. ;-)
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Zero fuel rail pressure with ignition off.
Ok, sounds like this may be a fuel system issue then.