The computer will not allow the car to full rev in park to protect the engine. Likewise there is a rev limiter when in drive which will shut down injectors at high engine speeds usually around 5000 RPM or so.
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There are several possible causes for this symptom. Your regulator is integrated to the fuel pump inside the fuel tank. Unless the problem is in the wiring, the pump will probably need replacing. A mechanic can check the wiring for you or you can check yourself with an ohmmeter.
Does it start better after sitting overnight? Is it missing at all? Check engine light? Hard starting could be fuel pump, also lack of power could be lack of fuel. If it starts better after sitting overnight, could be block catalytic converter. That would also explain lack of power. If you have to hold gas pedal half way down trying to get speed would explain why it is not going into overdrive. Hope this gives you some direction.
Try turn the ignition on...next put foot on the brake....Then mash gas pedal to the floor all the way down until it touches the floor and then back up 3 or 4 times..completely while foot is on brake .This works for GM and chrysler...It might help you I am not sure but it is worth a try.....>Some vehicles have a reset and a settings button on the dash board....If you have these buttons the pedal trick wont work.......Hope this helps.............................Metalpoet
For an engine to work properly, the fuel air mix must be within certain parameters. Too much fuel uses up the available air before the all the fuel is burned and causes the engine to 'stumble' (a momentary lack of power until the fuel/air ratio has been restored). Flooring the pedal can certainly cause these symptoms.
When this happens, it's lack of air, not gas that causes it. Check your air filter as a possible cause, it may need to be replaced.
IT DEFFO SOUNDS LIKE LACK OF FUEL, BUT FOR IT NOT TO RUN AT ALL UNLESS THROTTLE IS FULLY OPEN DOESN'T SOUND LIKE AN INJECTOR, MORE LIKE NO FUEL AT ALL, LIKE THE PUMP IS KNACKERED. PULL OUT AN INJECTOR, PUT IT IN A GLASS JAR, THEN TRY AND START IT, IT SHOULD GIVE A BIG POWERFUL SQUIRT OF FUEL, TRY ALL THE INJECTORS ONE AT A TIME, BECAUSE ITS QUITE RARE FOR ALL THE INJECTORS TO GO AT TE SAME TIME
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