TBI dumping fuel when cranking
 

THe car has been sitting for about a month and ran fine before it sat. Went to crank it yesterday and fills the bores with gas, wont crank. Saw that the map sensor vaccuum line had a hole in it, replaced it, no change. Replaced the gasket b/w tb and intake, no change. Can get the car to crank by unplugging both injectors and itll start with the fuel it already dumped but will die once its gone. I got it to crank another time with this method and plugged the injectors back in once it was running and it ran, but poorly. Smoked real bad, stumbled when you give it gas. Im gonna try the coolant temp sensor and see what that does. I have another TBI unit i will try if that doesnt fix it.

Thanks everyone,
Brian

Normally its either a map sensor or a coolant temp sensor and normally has a engine code associated with it. I read the bottom post as well and Thats got me stumped as of right now. It almost seems to me like the ecm is runnin in limp home mode or the egr is stuck open causing the o2 sensor to think it is running lean. Their isnt many constants that control the fuel outside of the ecm. As long as you have ground and injector pulse i dont think its a wiring issue. However i could be wrong.

My car behaved almost identically to this and it was the coolant temp sensor ...and a completely worn-out distributer cap. When the CTS dies the computer doesn't know what's going on until it warms up enough for the O2 sensor to work and go into closed loop mode. Of course, the fact that the distributer cap was so warn that it hardly made any contact with the rotor at all didn't help things. Poor thing sputtered and bucked and spit black smoke like it was on it's last days, and $35 later it ran like new.

coolant temp sensor!! good as gold now.

thanks everyone :thanks:
Brian