Ok so this one is starting to really bug me; I sold my friend my old '90 325is and he claimed that on the freeway cruising it would suddenly loose power and bog. Wouldnt go above 2500RPM's, it would then clear up. Also (dont know if its related) but the idle would drop to 500RPM and pick up when at a light. All this is very very random, every time I got the car for a week or so it would drive fine.
Well he sold that car to my brother, and he says its doing it randomly also. ALSO my friend has another '90 325i he brought into my shop yesterday for the same thing. He said this time it wouldnt go over 1500RPM so he towed it, been driving for a few days and running fine. I've checked fuel pressure (good), fuel pump wave form (good), fuel pump supply (good), coil resistance (spec: .5ohm on primary, actual 1ohm ?), crank sensor (spec:125ohm, actual: 162ohm ?), smoke tested good (just some leak out the valve cover), AFM is getting 5v's and sweeper seems fine, ICV resistance in spec.
Of course all these things are tested when the car is running fine, there might be a glitch in any one of these causing it to run the way it does. Any help would be appreciated, these cars are bugging me. Thanks.
Well he sold that car to my brother, and he says its doing it randomly also. ALSO my friend has another '90 325i he brought into my shop yesterday for the same thing. He said this time it wouldnt go over 1500RPM so he towed it, been driving for a few days and running fine. I've checked fuel pressure (good), fuel pump wave form (good), fuel pump supply (good), coil resistance (spec: .5ohm on primary, actual 1ohm ?), crank sensor (spec:125ohm, actual: 162ohm ?), smoke tested good (just some leak out the valve cover), AFM is getting 5v's and sweeper seems fine, ICV resistance in spec.
Of course all these things are tested when the car is running fine, there might be a glitch in any one of these causing it to run the way it does. Any help would be appreciated, these cars are bugging me. Thanks.
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