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Fuel pressure, does this look all right to you? (video inside) Wed Jun 05, 2024 5:30 am
Swedish.brick
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Hello fellow K riders,
I am having trouble with my 84 K100 RS not running properly. It starts and runs but very rough and blurry. Theres also backfiring from the exhaust, even when idling.
The spark plugs looks pretty sooty/oily. And you can tell that they are a little wet. I have ordered new ones tho, because when i checked the spark quality one or two of them looked pretty weak, even though they are almost brand new. The bike have been sitting for a year since it last ran. But then it was running just fine.
I also checked the leads and they look ok. I dont suspect the coils because i had them replaced last year due to errors on the old ones. They are second hand tho.
Pulled the fuel rail to see if the injectors were working ( also new ) and they did.
Anyhow, when testing to see if i had the correct fuel pressure it looked like this ( see video ) If you look closely you can see that it spikes up to 50psi, sometimes 60. And when i increase the rpm, the pressure also increases. Is it supposed to be like that?
When i turn the ignition off, it stays on about 36 psi as it should. At least for an hour or so. Could it be a faulty fuel pressure regulator?
Any input appriciated!
I am having trouble with my 84 K100 RS not running properly. It starts and runs but very rough and blurry. Theres also backfiring from the exhaust, even when idling.
The spark plugs looks pretty sooty/oily. And you can tell that they are a little wet. I have ordered new ones tho, because when i checked the spark quality one or two of them looked pretty weak, even though they are almost brand new. The bike have been sitting for a year since it last ran. But then it was running just fine.
I also checked the leads and they look ok. I dont suspect the coils because i had them replaced last year due to errors on the old ones. They are second hand tho.
Pulled the fuel rail to see if the injectors were working ( also new ) and they did.
Anyhow, when testing to see if i had the correct fuel pressure it looked like this ( see video ) If you look closely you can see that it spikes up to 50psi, sometimes 60. And when i increase the rpm, the pressure also increases. Is it supposed to be like that?
When i turn the ignition off, it stays on about 36 psi as it should. At least for an hour or so. Could it be a faulty fuel pressure regulator?
Any input appriciated!