Help please! Celica Problems!, 3s-fe Starts then stalls!!! Options

[samohare]

Hi, I recently purchased a celica gt 1993 with a 3s-fe engine! It cranks and starts fine but then stalls a second or so after. after reading other post i came to the conclusion the MAFS was causing the problem but then when went to inspect it i found it doesnt even have 1! so now stumped as to what is stoping the open circuit relay from making the cicuit to the fuel pump! Any help would be greatly apprieciated!

[J337777]

Your car shutting down right after it is started can be an open loop closed loop problem. If this is the case. since it is september it is not exactly winter for a cold starting problem. check your O2 sensors for their resistence and they also produce a signal for the electronic control module, this is only a guess at this point. Open loop is when the car is just started and not in its normal heat range and uses a cold start injector right through the intake on some models, I am not sure for your car. closed loop is when the car is now using all the sensors for timing, and proper firing and fine tunes the normal operation of the engine. Your original question details the relay circuitry. If your fuel pump maintains pressure but the fuel rail pressure relief valve may not be working properly.