Hello; I have a 2.6 w/163 k with the following repairs : head off valve grind, seals, guides,chain, plugs ,fuel filter, crank angle sensor and MAAB (fuel pump relay box) replaced.

Intermittently the following occur: Hot soak restart stall for first 3 min of operation-then fine (hasn't done this for a month) intermittent surging - missing under load .

sounds like an lifter is pecking when warm and uses a quart of oil 900 miles.

No oil leaks!

My last gas Benz was a 66 230s purchased at the factory and still have 4 diesels in the fleet. This 2.6 is making me nuts!

help..ideas..? Does it have a pre pump in the tank?

No pre-pump. The fuel pressure is retained in the system by check valves in the pump & the fuel pressure regulator at the engine. The car also has a fuel pressure accumulator next to the pumps.

Misfires are most likely a result of secondary ignition problems.

HAVE you checked the compression, possibly the lifters are holding the valves open??

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator