87 300E Engine Vibration
Thread Starter
Senior Member
Joined: Jan 2002
Posts: 420
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From: Bay Area
87 300 E
87 300E Engine Vibration
My car never starts the first time. And after driving for awhile at a stop light the car would vibrate alot. Any suggestions?
Thanks much
Love seeing all the W124 people out there
Thanks much
Love seeing all the W124 people out there
Newbie
Joined: Feb 2002
Posts: 6
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From: Chula Vista (South San Diego county), CA
'87 300E
This vibration that you are talking about, does it simply shake the car, or is it accompanied by sudden drops in the idle? Is it a consistant shake, or will it vibrate sporadically? Does the roughness disappear if you put it in neutral?
If it is rough while in park/neutral, than it probably is your motor mounts and your hard starts are an unrelated problem. However. if it is sporadic while in drive and stopped than you have the same problem I've been neglecting to take care of. It is most likely an ignition problem. Wires, plugs, dizzy cap, etc. Take a look.
If it is rough while in park/neutral, than it probably is your motor mounts and your hard starts are an unrelated problem. However. if it is sporadic while in drive and stopped than you have the same problem I've been neglecting to take care of. It is most likely an ignition problem. Wires, plugs, dizzy cap, etc. Take a look.
Thread Starter
Senior Member
Joined: Jan 2002
Posts: 420
Likes: 0
From: Bay Area
87 300 E
Yes, the whole car shakes.
It stops shaking when in neutral or park. it doesnt shake when im driving only in drive and idle. I dont know what you mean by drops so i guess it doesnt do that.
It stops shaking when in neutral or park. it doesnt shake when im driving only in drive and idle. I dont know what you mean by drops so i guess it doesnt do that.
Last edited by soldsep; Feb 8, 2002 at 01:40 PM.
Newbie
Joined: Feb 2002
Posts: 6
Likes: 0
From: Chula Vista (South San Diego county), CA
'87 300E
What I mean when I say that your idle drops in conjunction with the shake, is that the motor, lets say it is at about 700 RPMS at idle, drops to about 4-600 for about a second and then recovers and in this drop/recovery-time shakes. The same thing would happen if you lowered you idle to a very low setting. If your motor is barely getting enough (or burning enough) fuel to keep it running it is going to feel rough, like it wants to stall.
Anyway; same answer as before. Check out ignition components. If all is fine, your injectors may be dirty and clogged. The first time this happened to me that was the problem. However it was more exaggerated, it was rough at first, but then the motor would just die. This happened around 200k miles. If this is the case w/ your car, maybe you can catch it early by running a tank or two of Techron injection cleaner before your next oil change.
Another thing that should not be forgotten is simply the kind of gas you use. I hear 76 is good; also, I know you use it but I just gotta say PREMIUM. You may as well try a tank or two before you go through the trouble of diagnosing it. More of an annoyance than a threat so you can relax.
:o Sorry for rambling
Anyway; same answer as before. Check out ignition components. If all is fine, your injectors may be dirty and clogged. The first time this happened to me that was the problem. However it was more exaggerated, it was rough at first, but then the motor would just die. This happened around 200k miles. If this is the case w/ your car, maybe you can catch it early by running a tank or two of Techron injection cleaner before your next oil change.
Another thing that should not be forgotten is simply the kind of gas you use. I hear 76 is good; also, I know you use it but I just gotta say PREMIUM. You may as well try a tank or two before you go through the trouble of diagnosing it. More of an annoyance than a threat so you can relax.
:o Sorry for rambling
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Joined: May 2010
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Yeah,... Don't stop at lights.
J/k.... It's your motor mounts. They are dried out, replace them and the vibrating will be gone.
