HELLO ALL, THIS IS MY FIRST POST TO SITE!

I have a 1998 C 230 with 101, 000 miles on it.

After startup and driving for 5-10 minutes when I drive no problems but when at idle in drive it will shake for 2 seconds but not turn off. It wont do it after that at all until after cold start. Doesn't matter outside temp. no check engine light.

IS THIS THE START OF SOMETHING?



WHAT CAUSES THIS, throtle body, MASS AIR SENSOR NEEDS cleaning replacing?

SPARK PLUGS CHANGED 7 MONTHS AGO WITH FUEL FILTER.

Ideas would be appreciated!

 

CAR WOULD IDLE ROUGH LAST COUPLE OF WEEKS AS WELL IN DRIVE AND AT STOP.


ANY IDEAS ANYONE OUTTHERE ON WHERE TO START LOOKING FOR PROBLEM?

 

CLEAN THROTTLE BODY POSSIBLE CAUSE CARBON BUILD UP ON IT???????????

 

Technician wanted to do that but didn't until it did it to him too, i GUESS HE SHOULD HAVE DONE IT.

Would this cause rough idle in drive as well at times and occasional in drive vibration without engine light on?

WHAT SYMPTOMS DOES A M.A.f.Sensor, WHICH HAS NEVER BEEN REPLACED IN THIS CAR CAUSE?

 

yes it will give you poor idle,if the MAFF SENSOR IS NOTWORKIN CORRECTLY YOU LL HAVE MAJOR HESTITION ON FULL THROTTLE OR ON LOW THROTTLE AS WELL,with throttle its mainly on idle...

 

THANKS NAZ!!

 

DOES ANYONE HAVE PICS ON HOW TO CLEAN THROTLE BODY ON C 230???


I MAY BE ASKING TOO MUCH.

 

I CLEANED THROTLE BODY AND NO VIBRATION, BUT IT IDLES SLIGHTLY HIGHER AND AS I SLOW DOWN FROM 4O MPH I NOTICE LAST 2 GEARS DOWN SHIFTING MORE OBVIOUS WITH SLIGHT JERK. BY THE WAY FIRST TRANNY FLUID SERVICE AND CHANGE AT 100, 000 MILES, I WISH I WOULD HAVE DONE IT SOONER TO THIS SO CALLED 'SEALED NO MAITAINANCE TRANSMISSION"

ANY IDEAS IF THE NOTICEABLE BUT SMOOTH AUTOMATIC TRANSMISSION COULD BE THE START OF SOMETHING?

HOW DO YOU KNOW WHEN TRANNY IS GOING OUT, WHAT SYMPTOMS BESIDED NOT BEING ABLE TO PUT IT INTO GEAR?

 

try your motor mounts. mine did the same thing. stsrted at about 75,000 and increased when i hit 100,00 miles,

 

WELL after throtle body clean its still there.

AT IDLE RPM'S GO DOWN THEN BACK UP WHILE IN DRIVE AT STOP LIGHT AND IDLING, NOT EVERY TIME. OTHER THEN THAT NO PROBLEM WITH ACCELERATION AND CEL NOT ON. MECHANIC SAID DIDNT DO IT TO HIM.

WHAT WOULD CAUSE RPMS TO FLUCUTATE AT IDLE?

SPARK PLUGS CHANGED 6 MONTHS AGO AND NOTICED IT AFTER ONE MONT. CAN THAT DO IT.

1998 C 230.

HELP, TIRED OF PAYING THESE GUYS THAT HAVE NO IDEA, OR NO EXPERIENCE.