Ive been chasing this problem around for about 2 weeks now. I'm running out of ideas.

Car: 89 300e, m103 engine.

Symptoms: Runs like a dog, no power.

I suspected a vacuum leak, and I was right. At idle, I am only getting about 14-15hg of vacuum. Normal from what I searched is 18-22hg.

Checked the usual suspects:

1 idle air hoses: good
2 eliminated trans line, ignition advance line, and the line that goes in to the cabin: Good
3 Thinking I might have a clogged cat, I disconnected the exhaust system at the head. I basically loosened all the bolts enough to get me about 1/4 of an inch gap between the head and the exhaust manifold. drove it around the block. Still reading 14-15hg, no appreciable gain in power.
4 I thought maybe I had an ignition problem, so I swapped out the ignition coil. No change.


So now I am thinking that either my intake manifold gasket sprung a leak, or possibly my injector seals.

What do you guys think?

__________________
Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2