In idle time the engine is working well without AC but when it is on and I increase gas returning to idle time the engine is off can some one help me please

Asked by Apr 19, 2014 at 12:57 PM about the 2001 Mercedes-Benz C-Class C 320 Sedan

Question type: Maintenance & Repair

4 Answers

107,455

Are you saying it won't idle with ac on? If so then it's probably a dirty/faulty idle air control valve or dirty throttle plate giving you problems.

1 out of 1 people think this is helpful.

Thanks I will check it now

130

For rough idle problem check the fuel pressure regulator (on injection system @ front top of motor) it has a small rubber vacuum line on it, with the engine running; gently pull off the vacuum hose and hold it about 1/4 inch away from nipple. If you see petrol coming from the nipple on the regulator into the vacuum hose - there's your problem! Replace the fuel pressure regulator and it will run like new!

Best Answer

Thank you for your help

Your Answer

Add photo

Related Questions

  • rough idle 42 answers

    when i am driving it runs perfect but when it is stopped or put it park it runs rough?

    1994 Mercedes-Benz C-Class C 220 Sedan

    -

    Maintenance & Repair

  • Funny C 200 Idling Problem 8 answers

    Hi My C 200 petrol manual is a bit sick....Can someone help? In neutral gear at a stop sign or when idling generally - The idle falls very low and a miss fire seems to develop. Funny part is that if ...

    2003 Mercedes-Benz C-Class

    -

    Maintenance & Repair

  • Mercedes c300 shaking at idle misfires running lean 4 answers

    2010 Mercedes-Benz C-Class C 300

    -

    Maintenance & Repair

  • WHY WONT IT START 40 answers

    HEADLIGHTS WORK. WHEN KEY IS PUT INTO IGNITION, NO LIGHTS ARE DISPLAYED ON DASHBOARD. NO ENGINE SOUND. COULD IT BE THE STEERING LOCK. BATTERY IS OK. MERCEDES BENZ C220 CDI

    2007 Mercedes-Benz C-Class

    -

    Maintenance & Repair

  • fuelproblem??? Mercedes 560 SEL shuts down after starting while idling, sometimes while driving 16 answers

    My 560 SEL sometimes shuts off after starting, or shuts off while driving. If it shuts off while driving, the yellow indicator light to the left of the fuel gauge for the reserve tank use comes on, b...

    1991 Mercedes-Benz 560-Class 4 Dr 560SEL Sedan

    -

    Maintenance & Repair

C-Class

Looking for a Used C-Class in your area?

CarGurus has 30,885 nationwide C-Class listings starting at $1,500.

ZIP:

Search Mercedes-Benz C-Class Questions

Mercedes-Benz C-Class Experts

#1 Lorne Grandison
Lorne Grandison
Reputation 4,480
#2 PPC123
PPC123
Reputation 3,120
#3 dandyoun
dandyoun
Reputation 2,290
View All

Related Models For Sale

Used Mercedes-Benz E-Class
479 Great Deals out of 22,702 listings starting at $1,999
Used BMW 3 Series
1,119 Great Deals out of 35,563 listings starting at $900
Used Mercedes-Benz S-Class
151 Great Deals out of 6,417 listings starting at $2,300
Used BMW 5 Series
526 Great Deals out of 14,715 listings starting at $1,375
Used Audi A4
205 Great Deals out of 11,129 listings starting at $1,333
Used Mercedes-Benz CL-Class
28 Great Deals out of 607 listings starting at $4,988
Used BMW M3
62 Great Deals out of 1,935 listings starting at $4,999
Used Mercedes-Benz M-Class
197 Great Deals out of 5,243 listings starting at $2,955
Used Ford Mustang
317 Great Deals out of 45,660 listings starting at $2,000
Used Honda Accord
739 Great Deals out of 82,781 listings starting at $500
Used Chevrolet Camaro
144 Great Deals out of 35,537 listings starting at $1,995
Used Mercedes-Benz CLK-Class
28 Great Deals out of 1,482 listings starting at $2,495

Used Cars For Sale

2017 Mercedes-Benz C-Class For Sale
14,212 listings starting at $38,993
2016 Mercedes-Benz C-Class For Sale
140 Great Deals out of 3,422 listings starting at $25,699
2015 Mercedes-Benz C-Class For Sale
32 Great Deals out of 1,233 listings starting at $20,921
2014 Mercedes-Benz C-Class For Sale
86 Great Deals out of 3,224 listings starting at $13,890
2013 Mercedes-Benz C-Class For Sale
74 Great Deals out of 2,167 listings starting at $9,999