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My fuel pump won’t prime on, 350 EXCF.

6.7K views 25 replies 5 participants last post by  Nokkaz  
#1 ·
I have been installing a GET ECU and at first, it was working ok, then I decided to set the TPS. There are a few different methods to do this but the one I tried goes as follows. You have the engine off, take the diagnostic plug under the seat, and short 2 of the wires, this is supposed to wake up the bike and prime the fuel pump but with the engine off. Then you can connect the Wi-Fi com device to your phone and begin the TPS calibration process. I connected one end of a small piece of wire to the first pin and without connecting to the second, the fuel pump fired up and one of the relays started clicking. This seemed odd, why would just touch one pin cause the fuel pump to prime? I hadn’t connected the 2 pins.

The problem now is the bike won't start, when pressing the start button, the bike turns over, but the fuel pump doesn’t prime. If I touch the pin on the diagnostic port in the same way as before, the pump will prime, and I can start the bike. The bike runs well once started. I’ve swapped back to the original ECU and still have the same issue.

I’ve tested the fuel pump relay by shorting that to the ground and it primes, so I know the full pump and repay are ok.

Why won't the bike start on the button?
 
#24 ·
Fancy it?. We only plod around, some great lanes too.
 
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#21 ·
I've only ridden once so far on the road, then it went in for the suspension work. It has 5 maps included, and you can edit any of those to make new ones. The standard map makes the bike very smooth, and it just seems fuller, more meaty throughout the range, richer, perhaps? First impressions are very positive. We should organise a trail ride somewhere. You can try it for yourself.
 
#22 ·
We have a good days laning in Hampshire, when the weather improves I’ll get in touch, we’ll have a Sunday bimble.😁
 
#20 ·
Now you’ve got that sorted how does the GET ECU perform😜
 
#4 ·
Only the big one by starter relay nr battery (if same as other exc's)

I would try swapping the relay that was clicking for another (matching ine in 250?)

It shouldnt have done anything by just putting a wire in one port and it not being connected to anything else .........

Starter button wiring all good? Nothing else been disturbed?