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I need help to find out why my car wont run properly?

Tiny
WALTER MARTIN
  • MEMBER
  • 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.
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Tuesday, October 11th, 2011 AT 4:06 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 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
  • 2 POSTS
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
  • MECHANIC
  • 109,709 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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