300ce shakes, acts like it will stall

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badp81@gmail.com - 30 Dec 2006 04:14 GMT

A while back my 91 300ce started "shaking" when trying to accelerate
uphill. Instead of revving up when stepping on the gas, it would just
hold back and shake like it wasn't getting enough power.
Now it's gotten so bad that it shakes whenever it's in gear, and even
in neutral it does so a bit. I have replaced the ignition control
unit, the blower, and had the tranny flushed. I am going to take it to
my mechanic, but I would like to get an idea of what could be causing
this so that it will save us both time. Could a bad cat converter be
the problem? Fuel pump? The underside has been rattling for a long
time but my mechanic has never made mention of it. Thanks for your
input.

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Take A Guess - 30 Dec 2006 04:41 GMT

Appears to be fuel starvation. The maximum fuel demand is during
acceleration and hill climbing.

Little late to go to a mechanic after replacing the ignition control
unit, the blower - as if THAT had anything to do with the problem - and
a transmission flush - another waste of $$.

When was the fuel filter last replaced? I'd start there and if a new
filter doesn't fix it, go through the fuel system from there.

Happier New Year

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badp81@gmail.com - 30 Dec 2006 06:11 GMT

I have not ever replaced the fuel filter. I'll definitely check that
first. How often should the fuel filter be replaced?

The ignition control, blower, and tranny flush were just a side note of
what I have had done to the vehicle since I've had it. They are not
related to the problem but I should have made that clearer.

Thank you for your expertise and I appreciate any more help you and
others are willing to provide!

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Take A Guess - 30 Dec 2006 07:19 GMT

Fuel filter cycle is 40K to 60K miles.

Strongly suggest you get the maintenance schedule for this car and
follow it for that schedule really does save time and money by avoiding
problems like this one.

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badp81@gmail.com - 30 Dec 2006 15:42 GMT

Yes, definitely. I have put 36k+ miles on the car since I got it, and
don't know when the filter was last replaced, so it's high time to get
it taken care of. Thanks again.

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badp81@gmail.com - 05 Jan 2007 01:38 GMT

I replaced the fuel filter but it is still acting the same. I noticed
a hissing sound coming from the fuel injector area. Normal? The car
shakes in P and N, but it is more severe when in gear. Does this still
sound like a fuel starvation issue?

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