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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 10-15-2003, 10:29 PM
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Hi, first of all I want to say great site and great information. I've just joined and am needing some help.
When I accelerate the engine is pulsating/shuddering @55 mph/1500 rpm. When I just coast it is smooth. When it downshifts it smooths out also. Checked plugs, wires, changed fuel filter, etc. Any ideas?
Thanks.

BTW 325e, auto
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#2 (permalink) Old 10-16-2003, 08:20 AM
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Have you checked out the fuel pump? Sometimes the delivery rate from the pump to the injectors decreases, causing lowered pressure to the injectors. It might run fine at lower speeds but as the demand for fuel pressure increases, its just not available. Just a thought and it might be something worth looking into.
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#3 (permalink) Old 10-16-2003, 08:27 AM
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thats pretty bad, when was ure last service?

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#4 (permalink) Old 10-16-2003, 06:37 PM
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my car did the same thing when we first bought it, and the mechanic said it was somthing to do with the cruise control (don't ask me how). then he replaced the unit and that fixed the problem.

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#5 (permalink) Old 10-16-2003, 11:15 PM
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Well, I appreciate the help, will try those things. Also going to run diagnostics before anything as that will probably be smartest in not throwing away money on things that working correctly already
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#6 (permalink) Old 10-23-2003, 11:47 PM
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I just had a car diagnostic done...$75
#5 injector is dead, that would acount for alot.
Also need valve adjustment. Defintely worth running a diag. test before doing any guess work.
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