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S40 ii rpm drops

Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant.
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Alikbazzi
Posts: 1
Joined: 8 April 2018
Year and Model: 2006 s40
Location: Beirut

S40 ii rpm drops

Post by Alikbazzi »

2006 S40 2.4i
60k miles

Started dropping rpms when the engine is lightly loaded at around 2000 RPM with a constant throttle for more the 5 seconds.

When problem occurs, pressing pedal to a gear kick will clear it up. If you maintain light pressure on the pedal when the problem starts, the engine will begin to lose rpm gradually. The best way to describe this is that the engine is "surging".

No ignition problems, but maybe there is a higher MPG accompanied with the problem.

New OEM sparks
Good coils
MAF clean and brand new
MAP is good
Couldnt find a vacuum leak
Camshaft/crankshaft tested & working well

AND FINALLY!! NO CODES ON ECM or TCM! 😋

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