ive been having problems on start up on my truck.
its TBI so i shouldnt have to pump the peddle to make it start. well thats what it takes about 6 pumps and a good 30 seconds of cranking before it fires up.
i dont understand whats wrong it has newly rebuilt TBI assembaly new plugs, wires,cap and roteralso a fresh oil change.

is all original equipment 350
second problem is i cant find where to put my fuel pressure test kit on. on every other vehicle it was easy to find but for some reason i cant find it.
i get slight fuel pump noise after start up and shut down but not loud at all so im stuck.any ideas?

 

Have you verified the base timing with a timing light? You would have to unplug any advance (vacuum or electronic) and check the timing. If you are too far advanced, it will start very hard (turn over slow). Too little and it may not start at all.

I used adjust the timing on my Chevelle by ear, but that required a helper that you trusted. I'd loosen the distributor hold down just enough so I could move it with a bit of resistance. Then, with my dad in the car holding the brake with the trans in gear, he would hold the throttle slightly open. I'd advance the timing until it would start to ping, then back it off a few degrees. It is much easier to set the timing with a light!

 

i had thought about the timeing but i was told that my truck is electronicly timed by a module.i dont know for sure though. maye ill have to do some more research or someone might know if its electronic or not on here.
thanks.

 

TBI systems do not have a "port/valve" to check for pressure, if your fuel pressure gauge test kit is equipped it should have an adapter to mount inline in the fuel system to check for pressure. Pressure for a TBI system should be from 10 - 15psi.

When you installed the "new" TBI did all the sensors have connectors?? I ask because a friend converted a diesel chev to TBI and he had some wiring issues that kept the truck from starting/idling...so check all your connections on the TBI harness...

 

ok i checked the connections and everything seems to be in order.
did a little research and learned that my timeing and dwell are controled electronicly so changing the timeing isnt realy an option. in learning this i am convinced the root of the problem has something to do with the fuel delivery system now i just have to figure out where to start. i realy hope i dont have to replace the fuel pump ive done it before and that isnt any fun at all.
ok so if my test kit has the correct adapter, where exactly does it go? im used to seeing them right on the fuel rail so this is confuseing to me
thanks for the help

 

Timing IS adjustable on this truck. It needs to be warm, then you unplug the timing connector, usually located by the dist assy, but check your service manual for its location. Sometimes the underhood data label tells you where it is also, the timing spec will be there also. After that is unhooked, you set the timing like normal, then reconnect the connector and clear codes from the ecm. Korey.

 

wow no kidding i guess i was misslead. checked under the hood and sure enough it can be adjusted even better i have a timeing gun and ill finaly get to use it. I love this place everyone has been a wealth of help so far thank you very much everyone. ill get on the timeing in the morning.