googling finds some traces and info here
http://ls1tech.com/forums/pcm-diagnosti ... scope.html
http://www.msextra.com/forums/viewtopic ... 8&start=40
Megasquirt help!!
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- Forum Contributor
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- Joined: Sat Nov 18, 2006 6:22 pm
- Location: Northern Ireland
First, don't rely on a voltage reading taken with no load. All measurements should be taken with the relay connected.volospian wrote:Oh I do not fekking believe this... I thought I'd try and start it up, but now the fpr is not working. It was fine last time I connected it.
If I ground 85 manually, it comes on, pump runs, etc.
If I go into test mode, connect the multimeter between the fpr wire and a 12v feed, go into test mode and click "pump on" the voltage goes up to 12.5v and drops to 0v when I click "pump off".
However, when I click "pump on" and connect the fpr wire to pin 85 the voltage drops to 0v and the relay stays dead.
I thought the fpr was a switch to ground? When I ground the relay manually it works so it's not a duff relay, and when I just test a route to ground on the fpr it shows voltage... it just won't drive the relay any more. This was working before I started f*^king around with the ms.
Arrrgggghhhhhhhhhh........
I've not looked at your particular software, but the norm is for the pump to run for a couple of seconds at switch on - then only start again when MS sees a reliable tach signal.
IIRC, you can adjust how long the pump runs at switch on in software - or disable it totally. It's quite possible it is disabled in a test mode to prevent fuel being injected to a stationary engine, but that's only a guess. But if you try it again not using a test mode, does it run for a short time at switch on?
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y