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Try replacing the fuel injectors. They are expensive but you may try RC injectors. www.rceng.com is the site to go to. They were a cheaper alternative to me...Hope they can help you too.

AnswerThere's a good chance your fuel injectors are bad. I had the same problem and had them replaced, starts and runs fine now. But, more then likely it wont be cheap, the injectors (OE ones) are around $180, good luck. AnswerOk I have an 87 Supra non-turbo and my car did the same thing. I came to find out that on the intake there is a valve with a wire hooked up to it. If this wire or cord I should say comes unplugged from this intake valve, then the car will crank and then die right after. Plug this back in and your car should run just fine.((((( your problem is one of 2 things. you have no fuel pressure feeding injector rail pump can be new but if there is no power feeding pump you have no pressure first check for crancking power to fuel pump. also check fuel pump relay also computer sends power to engage pump relay usually from cam or crank sensor. i never saw 6 electronic fuel injectors go bad at the same time check for fuel injector pulse signal going to injector you must unplug electrical plug to each injector go to auto zone and purchase a injector test light or what techs call a noid light plug in 1 injector at a time and have someone crank engine if noid ligt flash or pulses on or of the injector is receiving thetrigger to open the valve in the injector and send fuel to that cylinder if you have no injector pulse check every fuse in car for open circuit if all good scan computer for bad cam or crank sensor test relay then stat test fuel pum by temporarolly running fused power wires to pump sounds like pump is not activating, test fuel pressure while cranking if no pressure fix pump curcuit good luck
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Q: Why does a 1988 Toyota Supra non-turbo start and then die and do the same if gas is sprayed directly into the throttle body after the fuel filter and fuel pump have been replaced?
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