This morning when I started the car it ran fine for a few minutes and than the fuel pump shut off. When I attempted to restart it the fuel relay was not going to ground. I unplugged the wire from pin 37 and grounded the relay pin 65 and the pump runs fine. It appears the MS2 (pin 37) is no longer grounding the relay pin 65. Seems to be stuck in a state where it goes if you turn the ignition on and don't crank the motor. Will the stim test pin 37?
What should I do next to find what is failing?
Fuel pump relay
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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.
Fuel pump relay
1971 Honda N600
700 cc air cooled engine
36 Hp
700 cc air cooled engine
36 Hp
Re: Fuel pump relay
The pump should run for a couple of seconds at switch on. If it does, this proves the pump drive circuit is OK.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Re: Fuel pump relay
Yes exactly. The relays are in the cabin and I can hear them operate. Nothing happens when the ign is switched on. This has been a running motor for the last 6 months. The car is not finish but the engine always starts and runs. I put the stim on the ECU and again nothing happens. I open the box and nothing seems burned and there is no smell. I don't know if it is a failed component or failed communications/firmware. The build went like clock work so I have no reference regarding trouble shooting. It is as if there is no power going to it.
1971 Honda N600
700 cc air cooled engine
36 Hp
700 cc air cooled engine
36 Hp
Re: Fuel pump relay
trakkies that's correct. Further update. On the car nothing happens when the ign is switched on. On the stim the leds flash PMP is on for a moment and than turns off. So it appears to function correctly on the Stim. I did notice the Ign led never lights on the Stim. I reloaded the Msq a Matt Cramer idea from another thread and this had no effect. Its as if the ECU is not getting power. Found it!!!!!! The 2 amp fuse between relay and pin28 is blown. I wonder what caused that.
1971 Honda N600
700 cc air cooled engine
36 Hp
700 cc air cooled engine
36 Hp