Thread: euro DME issues
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Porsche944 Porsche944 is offline
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Join Date: Dec 2002
Location: Richmond, VA
Posts: 484
I had a problem with my '84 that swapping the AFM and DME fixed.

The issue was if the electrical system was loaded (head lights, cooling fans, and /or A/C on), the engine would "stumble" at about 4500 RPM under hard acceleration. If I "feathered" the accelerator the engine would accelerate normally, but I never could hit the rev limiter. The engine also had the infamous "944 Shudder" as described on F.R. Wilk's site.

On a hunch I swapped the DME and AFM, and the results were quite dramatic. The shudder and stumble are gone, the engine runs smooth as glass, and I can hit the rev limit at will.

I have since added F.R.'s "Shudder Fix" adapter and chip the the original DME, but the engine still stumbles. I suspect component ageing of the injector drivers is the cause, but I have not been able to locate replacement drivers.

An additional upside to swapping the DME and AFM is you can add a "performance" chip.
Cliff Hipsher
'87 944 India Red
'86 951 Kalahari Metallic
Old 10-15-2003, 08:07 AM
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