1998 Tahoe 5.7 Fuel Economy

[SunlitComet]

follow the metal fuel lines from the spider backwards. about half way back to to engine rear on the left side of spider. will be a schrader valve with a black cap on it. looking for key on engine off after prime, engine running and large throttle crack.

 

[99TanHoe]

follow the metal fuel lines from the spider backwards. about half way back to to engine rear on the left side of spider. will be a schrader valve with a black cap on it. looking for key on engine off after prime, engine running and large throttle crack.

Ok, I'll see what I can do this weekend.

 

[bowtiefreak]

This is were to add a gauge or there is one there already?

 

[SunlitComet]

no this is where attach the pressure testing gauge however, if you wanted to add a constantly monitored sensor and gauge on obs it is the way to go.

 

[bowtiefreak]

you've done this? Picture please if you have.

 

[SunlitComet]

not yet you just screw on a sensor on but typically the fuel pressure is drained off the valve core is removed and an adapter it use to allow a common 1/8" npt sensor typical of electric gauges.

---------- Post added at 12:40 PM ---------- Previous post was at 12:38 PM ----------

have not gotten to pillar gauge pods yet. besides i still have a lot of wire provisioning to do thru the bulkhead. at least 22 wires.

 

[gpracer1]

I may just have to check mine to for sh|ts and giggles.....and a reference point.

 

[SunlitComet]

report the results here gp.

 

[gpracer1]

report the results here gp.

Ign on eng off 60 psi then settles to 55.
Idle 51-52 psi.
Blip throttle in neutral up to 61 then back to 52.
Light cruise 50 mph 55 psi.
Any load or over 1/8 throttle right to 60 psi.
WOT 61 psi.

 

[SunlitComet]

thanks. any mileage reading to go with those numbers.

---------- Post added at 07:18 PM ---------- Previous post was at 07:17 PM ----------

Also anybody else with these numbers as well for your vehicles.