How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask rpmdiag Your Own Question
rpmdiag
rpmdiag, Tech and Instructor
Category: Mercedes
Satisfied Customers: 8146
Experience:  Since 1975
12769047
Type Your Mercedes Question Here...
rpmdiag is online now
A new question is answered every 9 seconds

Have a 1993 Mercedes 300E 2.8L straight six. Car surges or

Customer Question

Have a 1993 Mercedes 300E 2.8L straight six. Car surges or decelerates when warm. I'm thinking injectors nedd cleaning? What do you think
JA: Are you fixing your 300E yourself? What have you tried so far?
Customer: Nothing yet
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 2 months ago.
Category: Mercedes
Expert:  rpmdiag replied 2 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 2 months ago.

Dirty injectors and throttle body are the main cause for surging as well as a weak fuel pump and plugged fuel filter.You check the fuel pressure and volume with a gauge. Most parts stores will loan you tools for a deposit too.

Please understand that I don't know your skill level or tools you
have to assist us. Also understand that I can't see, smell, hear, or
touch the vehicle either, so your patience is appreciated. JA is a
great Q/A site, but it does not replace a repair shop. So please
don’t shoot the messenger if I have to deliver bad news:)
If you are satisfied with my answer, I would greatly appreciate a 5
star rating now and I will still assist you after you have rated me
too if another question pops up. I don’t get credit for helping you
until you rate me.
Thanks again, Ron

Expert:  rpmdiag replied 2 months ago.

Did you have any more questions for me at this time?

Thanks again, Ron

Expert:  rpmdiag replied 2 months ago.

Our goal here is to assist you in the repair of your vehicle by
supplying you with well educated information. We may not always
have the exact fix you wanted to hear, but our job is to get you on
the right track, which we always do. We can’t hear, see, smell or
touch your vehicle from where we’re at, so your understanding of
that is greatly appreciated. There are no magical or miraculous
answers, but we do our best to guide you in the right direction.
Thanks, Ron