HarleyTechTalk

Dyno & Tuning Zone => AFR & Tuning Zone => Topic started by: itsafatboy on April 30, 2019, 04:35:46 PM

Title: Thundermax , i here fuel pump after it starts
Post by: itsafatboy on April 30, 2019, 04:35:46 PM
It could be in my head but after the bike primes then I start it I swear I hear the fuel pump like it just continually is priming, its a 01 softail ,   116"  thundermax .   its hard to start after it sits for few days , its the battery one of those lithium , shorai 480 cca ,   it cranks slow when cold have to try few times until battery is warm not sure I like the battery.   
Title: Re: Thundermax , i here fuel pump after it starts
Post by: Coyote on April 30, 2019, 04:39:43 PM
Isn't the fuel pump suppose to be running if the motor is running.  :nix:
Title: Re: Thundermax , i here fuel pump after it starts
Post by: itsafatboy on May 01, 2019, 05:40:11 PM
maybe your right , I just didn't think I would here it like it does when you turn key on?
Title: Re: Thundermax , i here fuel pump after it starts
Post by: Pirsch Fire Wagon on May 03, 2019, 04:26:28 AM
The FP runs initially for two seconds (ECM Strategy), then while the Crank Sensor is sending Signal. Normal. HOWEVER, an abnormally  loud pump may indicate an issue with the pump.
Title: Re: Thundermax , i here fuel pump after it starts
Post by: fbn ent on May 03, 2019, 06:31:12 AM
Try putting some Marvel Mystery Oil in with a couple tanks of fuel.....might quiet the pump down some. Wife's Sportster had a noisy pump at start up, worked for that.
Title: Re: Thundermax , i here fuel pump after it starts
Post by: rbabos on May 03, 2019, 01:40:15 PM
Quote from: fbn ent on May 03, 2019, 06:31:12 AM
Try putting some Marvel Mystery Oil in with a couple tanks of fuel.....might quiet the pump down some. Wife's Sportster had a noisy pump at start up, worked for that.
I did the same with my softail as in MMO. It had a dry bushing squeal to it when running 10E fuel. That solved it instantly.
Ron
Title: Re: Thundermax , i here fuel pump after it starts
Post by: rredneckn2 on May 03, 2019, 03:44:47 PM
Quote from: rbabos on May 03, 2019, 01:40:15 PM
Quote from: fbn ent on May 03, 2019, 06:31:12 AM
Try putting some Marvel Mystery Oil in with a couple tanks of fuel.....might quiet the pump down some. Wife's Sportster had a noisy pump at start up, worked for that.
I did the same with my softail as in MMO. It had a dry bushing squeal to it when running 10E fuel. That solved it instantly.Thats good info there! I use in my Lycoming It dam sure not hurting it.
Ron
Title: Re: Thundermax , i here fuel pump after it starts
Post by: rredneckn2 on May 03, 2019, 03:50:48 PM
Quote from: fbn ent on May 03, 2019, 06:31:12 AM
Try putting some Marvel Mystery Oil in with a couple tanks of fuel.....might quiet the pump down some. Wife's Sportster had a noisy pump at start up, worked for that.
Thanks to you also!
Title: Re: Thundermax , i here fuel pump after it starts
Post by: rbabos on May 04, 2019, 06:42:10 AM
Quote from: rredneckn2 on May 03, 2019, 03:44:47 PM
Quote from: rbabos on May 03, 2019, 01:40:15 PM
Quote from: fbn ent on May 03, 2019, 06:31:12 AM
Try putting some Marvel Mystery Oil in with a couple tanks of fuel.....might quiet the pump down some. Wife's Sportster had a noisy pump at start up, worked for that.
I did the same with my softail as in MMO. It had a dry bushing squeal to it when running 10E fuel. That solved it instantly.Thats good info there! I use in my Lycoming It dam sure not hurting it.
Ron
Ran it religiously on my Continental to prevent valve stick as do many owners. V rod sees it every now and then too.
Ron