Yes it should maintain 9-11 psi for tbi units. I found this in our tip section though so you might check this out as well.
This tip applies to 1989-1999 Chevrolet GMC trucks with all engines. If the vehicle doesn't start (but cranks), or starts and then stalls, and you have found there is power to the fuel pump when turning the key on for two seconds, which is normal, but no power while cranking the engine or with engine running, the most common cause is a deffective ignition module.
Originally posted for 1995 GMC Pickup C1500 5.0L
Friday, March 1st, 2013 AT 6:12 PM