fuel pump voltage drop
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Junior Member
Joined: Feb 2013
Posts: 92
Likes: 0
From: South Carolina
Car: 89 Iroc
Engine: 383
Transmission: 700
Axle/Gears: 4.11
fuel pump voltage drop
While running some datalogs I noticed that my fuel pump would experience voltage loss for a little while then pick back up to whatever the motor is putting out. When the voltage drops happens the car starts idling wild and exhaust smell gets real rich. When it picks back up the voltage the idle levels out and its happy again. Any suggestions?
Joined: Oct 2001
Posts: 12,221
Likes: 1,141
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: fuel pump voltage drop
Could it have anything to do with belt slippage??
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Joined: Jun 2001
Posts: 397
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From: new york , n.y. , USA
Car: klowny1969 <-youtube 4 3rd gen vids
Engine: subscribe to klowny1969 on youtube!
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Re: fuel pump voltage drop
What is the voltage at the battery when this happens? / alternator?
Thread Starter
Junior Member
Joined: Feb 2013
Posts: 92
Likes: 0
From: South Carolina
Car: 89 Iroc
Engine: 383
Transmission: 700
Axle/Gears: 4.11
Re: fuel pump voltage drop
Thanks guys...ended up being the relay connection was NASTY. Cleaned out the gunk and it is holding steady. Appreciate you offering advice though.
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92camaroJoe
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Aug 13, 2015 06:07 AM