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Erlkonig

07-20-2008 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

07-21-2008 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

07-22-2008 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

07-22-2008 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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