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Fuel pressure 't' location

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Old Nov 12, 2009 | 04:37 PM
  #1  
Jono4820's Avatar
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From: Fox Lake, Illinois
Car: 1991 RS
Engine: 350 TBI
Transmission: 700r4
Axle/Gears: 3.08 lt. slip
Fuel pressure 't' location

Where is the best spot to put test 't'? Return line or supply line?
I have found both in my search not sure which is correct. The regulator is in the TB so, I would think the return line would be correct....just not sure.
Thanks,
jon
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Old Nov 13, 2009 | 12:17 AM
  #2  
xch3no2's Avatar
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Joined: Oct 2009
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From: Pacific NW
Car: 89 K3500 Fleetside
Engine: RAT *tbi* EBL
Transmission: TH400
Axle/Gears: 3.73-Dana 60
Re: Fuel pressure 't' location

The fuel pressure gauge must be installed on the supply line.
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Old Nov 13, 2009 | 11:08 AM
  #3  
dctrumpet's Avatar
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From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: Fuel pressure 't' location

Must be on the supply line. Most of the TBI "t" fittings are 16mm x 1.5 which is supply line.
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Old Nov 14, 2009 | 06:42 AM
  #4  
Jono4820's Avatar
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From: Fox Lake, Illinois
Car: 1991 RS
Engine: 350 TBI
Transmission: 700r4
Axle/Gears: 3.08 lt. slip
Re: Fuel pressure 't' location

Thanks! Put a pemenant 't' on the rubber hose between steel lines under hood. FP is at 7 which would explain my f-ed up symptoms. Can't wait to pull the tank and replace the pump. (already changed filter) Thanks for the info!....Jon
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