Beetle L4-1.9L DSL Turbo (ALH) (1998)
Engine Control Module: All Technical Service Bulletins
Diesel Engine - Poor Throttle Response
23 07 02
August 13, 2007
2003575 Supersedes Technical Bulletin Group 23 number 07-01 dated April 5, 2007 due to updated content.
Poor Throttle Response
Poor throttle response on 1.9L TDI equipped vehicle.
Perform steps 1 through 9; if any of these steps reveals a problem, repair or adjust as necessary and perform a road test to determine whether the
customer concern has been resolved prior to continuing on to step 10.
All steps should be documented using VAS 5051 / 5052 printouts.
Check Engine Control Module (ECM) ground (GND) connection (see below).
Check injection pump timing (see below).
heck snow screen (if applicable) at intake air duct (see below).
Check vacuum hoses (see below).
Check Exhaust Gas Recirculation (EGR) valve and intake manifold air flap - integrated in EGR valve (see below).
Check Mass Air-Flow (MAF) sensor and (EGR) valve including solenoid valve (see below).
Check crankcase ventilation system (see below).
Check engine oil level (see below).
Check fuel quality (see below).
ECM ground connection, checking