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Re: I have a 1991 Lexus 400. It cranks but won't start.If...
Check battery cables. MAke sure they are on tight, and not corroded. Check ground wires inside the engine compartment, and even inside the car, for tightness. Try a good fuel injector cleaner, like Lucas.
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Your fuel pump or fuel pressure regulator are not supplying constant fuel pressure. Too much or too little is causing it to kill. You can pull the vacuum line from the regulaor and check for gas. If there is none, you need a pump, it is weak.
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