1990 GMC SIERRA 350 tbi starting issue

I have a 1990 GMC SIERRA 1/2 ton shortbed stedside With 125k
the engine is the original 350 w/tbi and 700R4 Tranny.
the problem i have with this truck is that when you go to start the engine you have to crank it for at least 5-7 seconds before it will start.
It runs excellent after that but when it comes time to start it same problem.

I have replaced the following parts , fuel pump/sock(old one wore out) and filter, ignition module(old one broke), cap/rotor, plugs ,wires, air filter, tbi to intake manifold gasket,.

when you drive on a long trip oh say 50 or more miles,
you go to start it and bam! starts instantly!

this truck get good mileage for such a large V-8
(18-20+ mpg highway) and idels very smooth.
it does have the ole small block chevy valve stem seal problems and uses maybe 1/4 to 1/2 half quart of oil every 3000k,
not bad for a 15 year old truck that used to tow a 25 ft 5000 lb
travel trailer (previous owner).

Does anyone know why it starts like this?
Is there a way to fix this problem?
Any one else have this problem?

One other thing has anyone elses white paint turn to $#!*
my bed paint is still good but the cab forget it

thanks in advance

1979Lee

change injectors some times the dirt gets pased the fuel filter and plugs up the injector nozel causing it to not get enough fuel and you might allso want to see if youre fuel regulator is bad not enough presure at start up will cause it not to start right off the bat

change injectors some times the dirt gets pased the fuel filter and plugs up the injector nozel causing it to not get enough fuel and you might allso want to see if youre fuel regulator is bad not enough presure at start up will cause it not to start right off the bat


thanks for the reply, and yes i do belive that it is the fuel press reg

thanks for your assistance!

Hey If You Want A Little More Power Summit Racing Caries A Adapter To Put 454 Tbi On It