I NEED HELP TO FIND OUT WHY MY CAR WONT RUN PROPERLY?

  • Tiny
  • Walter Martin
  • 1977 Mercedes Benz 420sel
  • 53,000 miles

Can you help me find out what is wrong with the fuel system/air pressure mixture. Thanks.

very nice car.450 SEL -US Model. Only done 53,000 miles!
The car starts and idles for a while but will not rev up.
-it stalls when the throttle is applied have replaced the fuel pump, regulator, filters etc.

Tuesday, October 11th, 2011 AT 4:06 PM

3 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

Check the throttle position sensor. Check for major vacuum leaks.

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Tuesday, October 11th, 2011 AT 4:08 PM
  • Tiny
  • Walter Martin
  • Member

Thanks very much for that!
-how would I check for major vacuum leaks?

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Tuesday, October 11th, 2011 AT 4:21 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

Go to our homepage under the DIY section for directions.

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Tuesday, October 11th, 2011 AT 4:30 PM

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