Dubya

i was driving with my 2 friends in my 89 camaro TBI. and im about an 1/8 miles from my place and my engine just cut out

now no fuel is going through the injectors and the clip for one of the injectors broke (the clip holding the unit plugging into the injector)
fuel pump is still running, the guy at my local chevy dealership said it could be the crank sensor if my security light was staying on while trying to start it, but thats not it.

maybe my in line fuel filter is completely clogged?
i also checked the injector fuses and they looked fine

v10viper04

pull the fuel lines off the back of your tbi unit and see if fuel is coming through there.. if so then you can narrow the prob down to the tbi unit if not then its prolly your fuel filter or a screwed up fuel pump....

Dubya

how could i tell if the problem is the tbi unit or just the fuel injectors?

v10viper04

i think theres a way to test the fuel injectors..... i'm not sure though, at least if its in there its narrowed down....

Dubya

true
appreciate the help

Dubya

well, i was about to take off the fuel lines to the TBI unit, but i decided to try and start it up
and it fired up for a second and then stopped pumping gas, my buddy thinks its the pressure regulator in the throttle body

v10viper04

if it was the regulator it prolly wouldn't fire at all......

Dubya

well, if i pulled the fuel lines off the back of the TBI unit and gas was still moving through, could the regulator be the cause?

v10viper04

if nothings going through your regulator then that probably the prob

Dubya

last night i removed the fuel inlet line to the TBI unit, and some gas shot out and then stopped after the pressure was relieved
so now it could be the pressure regulator or the fuel injectors?

v10viper04

I would assume so...

greywuuf

Sounds pretty Similar to mine. My 89 died and then refused to restart, though in my case the starter did not turn either. your 89 should have a VATS system on it and they are prone to breaking two very small wires on the back of the ignition switch. Might wanna read up on that system as well. There is also a relay that controls the fuel pump and a power steering pressure switch that are in the fuel pump electric system too.

I take it the car cranks ( motor turns when you hit the key) but wont fire ?

I have a hard time believing that anything in the TBI unit itself would fail and cause the car to quit, bad injectors get bad over time ( usually) Is the car throwing any codes ?

Good luck
Dan in Alaska

Dubya

the motor turns over but wont fire
no fuel is going through the injectors into the TBI unit

greywuuf

you need to make sure the fuel pump is running or at least getting power. There is a relay mine is showing evidence of overheating as in the connector is kinda melted, relay i beleive is on the firewall drivers side. might start there.

Dan

Dubya

so me and my buddy went to the jukyard today and picked up a fuel pressure regulator and 2 sets of injectors

cleaning my regulator and injectors didnt work
then we put the other regulator on with my injectors...didnt work
then the other regulator with the other injectors.... the driver side injector just poured out fuel and the passenger side didnt spray, pour, or even leak

and new injectors are what? $200 a piece? and idk where to even find the regulator

i swear the whole TBI unit was probably just a giant joke from chevy

v10viper04

nope and far from it if they are in good shape they work great...

Dubya

so hard to find parts for them

v10viper04

mine isn't....

Dubya

what places/websites do you find your TBI parts at? because im having trouble finding anything for TBI

v10viper04

if i ever need parts..... i go to advance auto parts... they seem to be pretty good with parts... i make my own gaskets with the rolls of gasket stuff....

Dubya

well, i still couldnt find the fuel pressure regulator

and at the prices for the fuel injectors, i could go to the junyard and rip out of complete 350 TPI, wiring harness, and ECM for under $300

i think it'd be almost worth it to do that, even though its more work