BADASS of New England
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BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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Most users ever online was 182 on Thu May 27, 2021 9:57 pm
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 Fuel pressure readings

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MASShole9C1

MASShole9C1

Posts : 4294
Join date : 2009-12-16

Fuel pressure readings Empty
PostSubject: Fuel pressure readings   Fuel pressure readings EmptyWed Jun 24, 2015 1:50 pm

This is the '94 RMS

Idle 35-36 PSI
Hit the throttle (quick snap) in park jumps to 45
Let off throttle drops down to 33 then back to 36

Hold throttle down in park 33-34 PSI then rises to 36 PSI once let off

Idle with no FPR vacuum 46 PSI
Unplugged FBR throttle snap 46 PSI
Plug FPR back in PSI drops to 36 again

KOEO PSI jumps to and stays at 44 PSI

I know the fuel filter is ooooooold and needs to be replaced, but can't say it'd clog to cause this issue.

Can't take a drive and watch gauge. Hose isn't long enough. Trying to borrow one...

Thoughts?
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sdstick

sdstick

Posts : 4292
Join date : 2009-03-20
Location : Revere, MA

Fuel pressure readings Empty
PostSubject: Re: Fuel pressure readings   Fuel pressure readings EmptyThu Jun 25, 2015 8:07 pm

I had a car run on 20psi
thats not your problem IMO

_________________
Steve
Fuel pressure readings Impala2010002

96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
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MASShole9C1

MASShole9C1

Posts : 4294
Join date : 2009-12-16

Fuel pressure readings Empty
PostSubject: Re: Fuel pressure readings   Fuel pressure readings EmptyThu Jun 25, 2015 8:09 pm

It's not the problem, but it's a problem.

20psi doesn't sound like that car ran good at all if you're talking about an LT1.
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sdstick

sdstick

Posts : 4292
Join date : 2009-03-20
Location : Revere, MA

Fuel pressure readings Empty
PostSubject: Re: Fuel pressure readings   Fuel pressure readings EmptyThu Jun 25, 2015 8:11 pm

Trying to remeber now if that was the operating or prime psi
I just remember saying after seeing it...wow...still running without issue
Think it was an intermittant start

_________________
Steve
Fuel pressure readings Impala2010002

96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
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BADASS of New England :: 91-96 B & D-body tech :: Problems / Maintenance-
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