87 fxr won’t stay on
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Stage I
Joined: Nov 2020
Posts: 1
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From: new york
87 fxr won’t stay on
So I have 87 FXR and when it’s running it’s at 13 V when I hit the gas it goes up to 14.2 V but then after that once it’s warmed up a little bit the voltage goes back down to 13 V now if I let it sit for a little longer it drops down to 12.4 V and shuts off it also has like a little backfire when it does this and sounds like a misfire but it’s new plugs and coil. Anybody else have anything similar happened, it’s a new stater and voltage regulator not sure what else It could be unless those went bad maybe
Grand HDF Member
Joined: Aug 2008
Posts: 3,601
Likes: 9,915
From: Florida's gorgeous East coast
THIS:
Diagnosis of every "issue" that includes the electrical system should begin with either a load test of the battery, or replacement, just for testing purposes with a battery KNOWN to be good. Notice I didn't say with a NEW battery. A new battery is an unknown. It's unusual, but brand new batteries are occasionally bad. If you're an amateur ( like me) after a new battery doesn't solve the problem... you'll chase the problem with new parts until you finally figure out that the new battery you just bought is no good.
Diagnosis of every "issue" that includes the electrical system should begin with either a load test of the battery, or replacement, just for testing purposes with a battery KNOWN to be good. Notice I didn't say with a NEW battery. A new battery is an unknown. It's unusual, but brand new batteries are occasionally bad. If you're an amateur ( like me) after a new battery doesn't solve the problem... you'll chase the problem with new parts until you finally figure out that the new battery you just bought is no good.
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Jason Shawver
Ignition/Tuner/ECM/Fuel Injection
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Aug 11, 2020 09:56 PM
