Hesitates and backfires when engine gets hot

Tiny
FSHXH0
  • MEMBER
  • 1997 MERCEDES BENZ C280
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 101,000 MILES
My 1997 Mercedes Benz C280 starts very easy but when the motor is already hot(not overheating) it hesitates and backfires. The idle is good and it does'nt shake at all. It can run only 5-10 miles/hr. But it does'nt cutoff. The fuel pressure is good right on the specs. The check engine light is not on. There is no code and no pending code. What is the problem and how do you fix it?
Thursday, February 24th, 2011 AT 5:05 AM

2 Replies

Tiny
ERNEST CLARK
  • MECHANIC
  • 1,730 POSTS
Check fuel filter for clogging and leaking fuel pressure regulator. Pull vacuum line. Pressure should increase. If it doesn't, replace. Also check for presence of fuel in line. If any, replace.
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Thursday, February 24th, 2011 AT 1:23 PM
Tiny
JEFFREY76
  • MEMBER
  • 1 POST
Hey fshxho,
I also have a c280 1997 who has the same problem and my mercedes mechanic cannot isolate the problem without tossing parts, have you resolved that issue? What was the cause?

Thanks
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Thursday, August 25th, 2011 AT 1:12 PM

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