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#1 |
Join Date: Oct 2019
Posts: 16
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Hawk DLX electrical grimlins
Hello All - need some perspective on this:
Hawk DLX sat for a bit. I ran it, but not enough. Bought it with a bad cluster, had to do some rewiring with the cluster, but was running before an after this. Fast forward to now, can't get a spark, no fuel pump sound. Did a volt test at the fuel pump and gettin around 9.5v all the time at the pump socket. Even with the key off. At this point I am thinking it is a ECU problem? Disconnected the cluster. No change. Unit will turn the starter like anticipated. Sitting here frustrated, appreciate the help. |
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#2 |
Join Date: Jan 2020
Posts: 274
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Have you checked the voltage at the battery? If that, too, is 9.5 volts then you may have found half of your issue.
I think finding voltage at the fuel pump when the key is off is also concerning. That indicates a wiring malfunction somewhere, or something being connected backwards. I'd highly doubt (I say, not having access to a wiring diagram for this bike) that the fuel pump is controlled by the ECU. The injector and spark ignition certainly are, but the pump should either be switched by a master relay someplace or directly by the keyswitch. My recommendation is to make sure you didn't switch any wires around when rewiring your cluster, or get any connectors reversed, etc. I've seen vehicle electrics do odd things when circuits are closed backwards and voltage gets sent in the out, etc. If everything else checks out and it works before you did some work, common sense says that whatever you last changed is most likely related to what's going on. |
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#3 | |
Join Date: Jan 2022
Location: Gatesville Texas
Posts: 161
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Quote:
Constant power would definitely burn The pump up. But I don't know if that would kill the spark? It could be a failsafe.
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2021 RPS Hawk "IKEA" (Came in a box with no instructions) 110 main jet 1washer,2.5 sprockets and the cat fell off( with a little help) 1984 Honda V65 Magna "Daddy's Little Monster" To whoever stole my anti-depressants. I Hope Your Happy ! |
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#4 | |
Join Date: Oct 2019
Posts: 16
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Quote:
Found the relay that supplies power to the pump. Only relay on the bike - aside from the turn signal relay. It was all crusty and corroded looking, found a new one at the auto parts store. It is just a cheapo AC/fuel pump relay. Tracing wires, squinting at colors: turns out this relay also supplies power to the coil. Plugged in the new relay, started right up. Thanks to both of you for the replies. |
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#6 |
Join Date: Feb 2021
Location: Kansas City
Posts: 2,601
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Awesome!!! Another EFI problem solved.
These EFi's are flawless!!!! |
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#7 |
Join Date: Apr 2021
Posts: 9
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At least they actually start and run new out of the box unlike the carb bikes.
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2020 Hawk DLX |
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#8 |
Join Date: May 2018
Posts: 1,631
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They run and ride out of the box ,they are just very lean so they pass emissions,but they do run .
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#9 |
Join Date: Aug 2022
Posts: 8
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Can a ecu cause no spark conditions please help no spark if delphi mt05.2 can't cause no spark condition then I have to get stator or pick up coil
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#10 |
Join Date: May 2021
Posts: 351
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The first line on post #2 is something to think about. Just a thought here!
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#11 |
Join Date: Aug 2022
Posts: 8
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No spark hawk dlx efi
Replace the relay temp sensor coil and spark plug. It's pi k up coil or stator both rectifier ? No spark trying the ecu hudhacker 4.7 close to getting that eprom chip reset . Was running backfired and no start no spark.
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#12 | |
Join Date: Feb 2021
Location: Kansas City
Posts: 2,601
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Quote:
Maybe you can give RFoster950 a hand here. His EFI bike is faultering. Sounds mysterious. But I am not the expert on EFI. I guess they run (lean) until they don't. Maybe this doesn't happen to most EFI owners, but when it does, you can't just clean the throttle body. Carbs are low maintenance, low anxiety and no wiring at all. The EFI/carb conversation continues! ![]() |
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