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Reanimotion Reanimotion is offline
umop apisdn
Join Date: Jun 2014
Location: Brisbane, Australia
Posts: 507

My first thought was maybe Decel Fuel Cut triggered by the MAPdot, however
RPM - MAP and VE - DPR mA all seem smooth, so it doesn't appear to be a control issue

If I remember correctly over fuelling or an incomplete burn can cause a lean response from the wideband sensor as there is excess oxygen left in the exhaust, therefore it may not be truly lean at those points,

can you feel the engine lose and gain power between those jumps?
1981 928S 4.7 ROW with KE3-Jetronic and Franken8 (AEM Inifinty) "Be the man your dog thinks you are."
Yes! mechanical/hydraulic constant flow injection can be managed by a modern EMS
Old 09-23-2018, 04:34 PM
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