Hey guys, I recently tried to start my 1989 305 TBI camaro that has been sitting in a garage for the last two years and at first the battery was dead (of course). So I bought a new battery and added about 5 gallons of fuel. Then I tried to start the car and it just turned over and over and never started. So I got out and checked the TBI. No fuel is flowing throught the injectors. Do you guys have any idea about what it is that is causing the problem. BTW the car ran fine two years ago and I just yesterday replaced the fuel filter. I also can get it to run if I pour gas in the TBI, at least until the fuel is burnt. The fuel pump does make noise when you turn the key on, also it shuts off after two seconds so I know it is at least working.

 

Since it's been sitting for a while, I have a little trick for you to try. Turn the engine over and tap on side of the TBI unit right next to the injectors. Don't hammer on it, just tap it solidly, and see if the injector spray then. I know that sounds weird, but I honestly have had to do that to TBI motors that have sat for a while. Somehow the pintles in the injectors get stuck/clogged and just need a little persuasion to get them working again.


Anyway, if that doesn't work, disconnect one of the injector electrical connectors and attach either a test light or noid light (for GM TBIs, of course) across the injector wires, and crank the engine. If the light flashes while cranking, you know the wiring, computer, etc. are good and that the problem is either the injectors themselves or low fuel pressure. If the light doesn't flash, the problem lies somewhere in the ECM, injector wiring, or even possibly the ICM or pick-up in the distributor. Test both injector electrical connectors.

You could also check fuel pressure, just to make sure the fuel pump and regulator are still up to par. Fuel pressure should be 9-13 PSI.

Also, it might be worth it to double-check and make sure the fuel filter is installed correctly (mainly, in the right direction). And don't forget to check the easy stuff first, like the fuseable links by the battery and all the fuses.

 

ok, I will try that. I did try tapping on the Fuel pressure regulator because I thought maybe it was stuck closed. I then took it off and it looked good and loose but I did not try the tapping the injector injector itself. Fuel will barely drip sometimes from the injectors so that looks like a good place to check. If not I am going to junk the whole TBI. I am building it for racing soon anyway.