noob question

[mike in pdx]

Trying to perform fuel pressure check on 97 Yukon 5.7. Is there a special fitting required to tap the Schrader valve on the fuel rail? Not sure my cheapo Harbor Fright test rig has what I need.

[mike in pdx]

On 11/10/2017 at 12:02 PM, mike in pdx said:

Trying to perform fuel pressure check on 97 Yukon 5.7. Is there a special fitting required to tap the Schrader valve on the fuel rail? Not sure my cheapo Harbor Fright test rig has what I need.

Was this a hard question? Many views, no replies...

 

[txab]

Have you tried to hook the gauge you have up?

[no HD]

Make sure the hose on your HF guage has something in the center to push in the core on the Schrader valve. If you get no reading you could temporarily remove the core and hook up the hose to get a reading. I think most gm fuel rails on those years trucks use the standard valve. I don't remember having to use any special adapters or anything to ck fuel pressure.

[mike in pdx]

Thanks all for replies. Turns out it was my cheapie test unit. Got a better kit and it had the correct fitting. Time to change the pump...  -_- 

[green 788]

what pressure reading were you getting (key on, engine off)... and running engine

[mike in pdx]

Pump was dead, no output. Pump replaced and we're back in business.