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My car is a 1992 Benz 300SE W140 Automatic Transmission, whenever i start the car and put it on D, when i step on the throttle nothing happens (the engine rpm does not increase) then after 1 second it suddenly accelerates normally until you have to stop at another intersection and the Engine RPM drops to idle, trying to accelerate, nothing happens again then suddenly accelerates.

This occurs until i get the car up to proper engine temp (around 90c) then the problem doesnt happen anymore, until i shut off the engine and restart again...

Could it be a transmission issue? (but when i step on the throttle nothing happens, not even the engine rpm increases then after a second the engine rpms go up and the car accelerates)

or could it be a fuel delivery issue? fuel pump? clogged lines? or could it be the MAF?

thanks in advance

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  • I recently had some work done on the car, the fuel hose from the tank had cracks and was leaking gasoline so i had that hose replaced then this started to happen. – bose Mar 13 '19 at 6:14
  • Also, i checked the transmission dipstick and the ATF looked pristine and did not have a burnt smell/appearance and was exactly on the max line. – bose Mar 13 '19 at 6:16
  • Welcome to Motor Vehicle Maintenance & Repair! To my thinking, this would not be an issue with the transmission, but rather something on the engine side. If it were the transmission, your engine would still respond when you press the pedal. It may have to do with the throttle position sensor (if it has one), but no real way to tell at this point. – Pᴀᴜʟsᴛᴇʀ2♦ Mar 13 '19 at 10:34
  • Possibly an air leak somewhere. – HandyHowie Mar 13 '19 at 10:41
  • @Pᴀᴜʟsᴛᴇʀ2 I was under the same impression, the transmission pulls hard and checking the ATF, looks brand new and no burnt smell/appearance. If it were slipping tranny, when i step on the pedal the engine rpm should instantly rise and no acceleration. in my case, stepping on the pedal, no engine rpm and no acceleration – bose Mar 13 '19 at 13:25

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