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Erlkonig

Jul 20, 2008 11:59 PM

Help with annoying 964 hesitation

My 964 C4 has a hesitation when I depress the throttle hard. The engine will hesitate or bog for a full second or two then start to accelerate. It also happens when cruising in gears 2-4. I also notice an intermittent rough idle. I have new plugs, wires, caps, and rotors. The primary distributor belt was replaced last winter. DME relay and fuel filter on order. What else could be causing this?

PorscheDoc

Jul 21, 2008 08:35 AM

RE: Help with annoying 964 hesitation

Might want to pull the AFM and check to make sure the potentiometer arm is not riding in a groove on the strip.

Erlkonig

Jul 22, 2008 12:18 AM

RE: Help with annoying 964 hesitation

If the Air Flow Meter is the culprit can the AFM be repaired or do I have to spend $1279.00 for a new one? I noticed that my oldplugs were white. Is this a good indication of the AFM makingher run lean and causing the hesitations?

Erlkonig

Jul 22, 2008 10:03 PM

RE: Help with annoying 964 hesitation

There is a really good video on youtube called "Rejuvenating a Bosch Motronic AFM". I'm pulling mine ASAP to fix it. Is there anything else I should be looking at?

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