Hello,

'88 260E

Today I noticed that when I started driving at any red light the engine hestiated so bad that it almost stalled. I had to keep pumping the gas pedal to finally keep it going. Once on the road it would accelerate well.

I have been seaching the forum and from what I read there might be vacuum leak somewhere. I say this because I read that applying the break (which I do before any red light) uses up so much vacuum.

Once I got home I checked the vacuum hoses that I know of and injectors seat for leaks listening through a plastic hose. The only place I noticed a hiss was the seat of fuel injector of cyl #2. (the other seals had no hissing at all). I have not re-sealed it yet but would this be the big culprit? Can someone please send me the location of all the vacuum hoses so I can check for more leaks.

Thanks a bunch in advance.

Zorin

'88 260E
'86 300 Manual
'84 944

I fixed the leak from cylinder 2 injector seat but the problem of hesitation after applying the break persists.
Any suggestion ?

I had a similar problem. Ended up being a blown brake booster diaphram. You can check it by starting your car with radio and a/c off and depress brake pedal and listen carefully. If it is blown you will hear hissing sound coming from the brake pedal area.

__________________
1987 190 Euro

To clear up one item, was everything working fine until today, when the symptoms began 'suddenly'? If so, then a vacuum system problem is likely your culprit. Most other causes would tend to develop gradually.

Steve

__________________
'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7

I replaced the ignition coil , that fixed the problem. The car also used to take more than one crank to start. It fixed that problem as well.

Thank you.

__________________
Zorin

'88 Benz 420 SEL
'79 Porsche 911SC ('87 Carrera Engine)
'00 BMW 540 Sports Package
'99 Land Rover Discovery

86 300E - Manual (sold)
88 260E (sold)
84 944 (sold)