IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Scoobum on June 09 2013, 07:16:25 PM

Title: Quick Fuel Pressure Drop
Post by: Scoobum on June 09 2013, 07:16:25 PM

Got a GN here where the fuel pressure drops to zero almost instantly when you turn the key off. Pump is new from Racetronix. Injectors are 55's...unsure of age. Fire away guys.

Title: Re: Quick Fuel Pressure Drop
Post by: earlbrown on June 09 2013, 07:55:23 PM

stuck injector, fuel pulsator, leaky hangar fuel pump hose, or leaky check valve in the pump.

Title: Re: Quick Fuel Pressure Drop
Post by: Scoobum on June 09 2013, 07:57:46 PM

Thanks Earl.

Title: Re: Quick Fuel Pressure Drop
Post by: Steve Wood on June 09 2013, 08:13:21 PM

http://www.vortexbuicks-etc.com/fuel_pressure_diagnosis.htm (http://www.vortexbuicks-etc.com/fuel_pressure_diagnosis.htm)

somewhere on my site, there should be a write up describing clamping off the two rubber hoses at the front of the car to isolate the problem but I don't see it...anyway, the trouble tree in the link above tells you what to do