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My question: what can cause the car to do this?

We are driving down the street at 45 miles, suddenly the car starts to hesitate, like if it's going to turn off, so I remove my foot from the gas pedal. And about 3 to 5 seconds later the car accelerates from 750 rpms to 2200 rpms(remember I do not have my foot on the gas pedal), the car then hesitates again and drops from 2200 rpms down to 750 rpms. This causes the car to jerk every 3 to 5 seconds violently and continues this pattern with my foot not on the gas pedal.

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I assume the car you are talking about is your 1968 Dodge Dart GTS with a 4-speed manual transmission. The engine has a special camshaft, Chrysler P/N 312044, which has a 60 degree overlap in the valve timing, since the engine is built to rev in excess of 6,000 RPM. The problem with your car is obviously a leaky accelerator pump. Why don't you get a car that (1) does not have to run on premium gas (because of its 10.5:1 compression ratio), and (2) uses fuel injectors instead of a wild 4 barrel carburetor made for 1/4 mile drag racing? I happen to know that that is the car you are referring to, because you did NOT say that it WASN'T!

Posted on Apr 29, 2017

  • Esther Reyes
    Esther Reyes Apr 29, 2017

    My car is a 2002 Acura tl 3.2

  • solver2010 Apr 29, 2017

    Why didn't you tell me that is was NOT your '68 Dodge Dart GTS 340 Magnum that you were talking about? On an Acura, it sounds like a vacuum leak or maybe a fuel pressure regulator failing or stuck, but it could also be a TPS (throttle position sensor)! Do you see any warning lights such as Check Engine?



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