1992 300ce-24V hesitation
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Mercedes Benz
1992 300ce-24V hesitation
Hello all. I have a 1992 300CE-24V( 104.980 engine ) and am having minor problems with it. It sometimes hesitates when taking off. Not very much though. The hesitation goes away if you step a little further and the car shifts into first gear. Seems like when doing low revs and wide throttle opening, the problem is most likely to occur. I strongly suspect loss of spark, but not in any one particular cylinder, though. There are new plugs
( champion C11YCC-the recommended ones), leads, coil, rotor, cap and fuel filter.. the works. I have also noticed slight loss of power when accelerating in fourth gear( the car is 5 speed automatic ), while doing low revs until it shifts into 3rd gear. As soon as it shifted into 3rd gear it behaved normally
( higher revs and less load ). And it never does this when cold. Only sometimes when hot. Not always though. Hmm.?
Any clues..? Anyone experienced something similar..?
Any help or ideas much appreciated.. thanks.
( champion C11YCC-the recommended ones), leads, coil, rotor, cap and fuel filter.. the works. I have also noticed slight loss of power when accelerating in fourth gear( the car is 5 speed automatic ), while doing low revs until it shifts into 3rd gear. As soon as it shifted into 3rd gear it behaved normally
( higher revs and less load ). And it never does this when cold. Only sometimes when hot. Not always though. Hmm.?
Any clues..? Anyone experienced something similar..?
Any help or ideas much appreciated.. thanks.
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From: Middlefield, CT
1994 E320
Re: 1992 300ce-24V hesitation
Originally posted by 124-Fan
And it never does this when cold. Only sometimes when hot. Not always though.
And it never does this when cold. Only sometimes when hot. Not always though.
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You might be right, Jer. Thanks. Although it strikes me a little odd, that one moment it´s perfoming superbly and then all of a sudden it this starts. Then perhaps all is suddenly well again. Sounds a bit electrical... Don´t you think ?
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From: Middlefield, CT
1994 E320
Not too sure about electrical. The injectors do not have electric solenoids; they operate solely on fuel pressure.
How old is the O2 sensor? It might be sending bogus data to the LH control unit and messing up the mixture.
How old is the O2 sensor? It might be sending bogus data to the LH control unit and messing up the mixture.
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Yea, I know the injectors aren´t electrical. I was thinking some other electrical failure.
And I was also wondering about the O2 sensor myself. Hooked up an exhaust gas analyzer and all emissions were within limits. CO content was to be excact 0.27%. Given value is max 0.5%
-I believe there is a knock sensor on the intake manifold. If ignition knocking is sensed, it will retard the ignition. Perhaps you could look this up for me if you have any books covering this engine.
Anyhow, I cleaned the terminals on it( I think it was a knock sensor ), they were a bit corroded. It hasn´t done this since. Been driving for a few hours now and all´s well... For now..
Thanks.
And I was also wondering about the O2 sensor myself. Hooked up an exhaust gas analyzer and all emissions were within limits. CO content was to be excact 0.27%. Given value is max 0.5%
-I believe there is a knock sensor on the intake manifold. If ignition knocking is sensed, it will retard the ignition. Perhaps you could look this up for me if you have any books covering this engine.
Anyhow, I cleaned the terminals on it( I think it was a knock sensor ), they were a bit corroded. It hasn´t done this since. Been driving for a few hours now and all´s well... For now..
Thanks.
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Well, is there a knock sensor in this injection ?
If so, is it a small black plastic box with a three-pole plug connected to it. Located in front of the fuel distributor under the air filter Attached to the intake manifold. And is there a way of testing it ?
Because I´d like to know what sensor that is that I cleaned the terminals on. Think it´s a knock sensor..
Thanks.
If so, is it a small black plastic box with a three-pole plug connected to it. Located in front of the fuel distributor under the air filter Attached to the intake manifold. And is there a way of testing it ?
Because I´d like to know what sensor that is that I cleaned the terminals on. Think it´s a knock sensor..
Thanks.
