1977 Mercedes Benz 420sel You Find Out Wrong Fuel System Air Pressure Mixtur

1977 MERCEDES BENZ 420SEL
53,000 MILES
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WALTER MARTIN
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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.
Oct 11, 2011 at 4:06 PM
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JACOBANDNICKOLAS
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Check the throttle position sensor. Check for major vacuum leaks.
Oct 11, 2011 at 4:08 PM
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WALTER MARTIN
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Thanks very much for that!
-how would I check for major vacuum leaks?
Oct 11, 2011 at 4:21 PM
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JACOBANDNICKOLAS
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Go to our homepage under the DIY section for directions.
Oct 11, 2011 at 4:30 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.