1998 audi a4 1.8t has lost take off acceleration,also does not seem to accelerate like it should at highway speeds. no warning lights, idles smooth. could this turbo problem?
similar problem, audi a3 2002 1.8 - idle rate fluctuates and the engine loses power when I accelerate. fuel filter change at last service (6 months) and I've checked all the fuses relating to engine control... any ideas
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ASR - Acceleration Skid Control system. When ASR warning light blinking the system is activated itself for car acceleration skid control. For today's typical high-torque engines, traction control (ASR) can increase both comfort and safety, particularly when driving on slippery roads or surfaces offering differing levels of grip. Traction control permits smooth starting and acceleration through the full speed range without wheel-spin or fishtailing.
ASR only operates in conjunction with the electronic accelerator (E-gas) and uses components of the anti-lock braking system (ABS). If one wheel suddenly begins to rotate faster than the others (slip), ASR intervenes in the engine management system and reduces power until the wheel stops spinning. The ASR system represents a further contribution to active safety as it maintains vehicle traction and directional stability throughout the acceleration phase at any speed. In addition, it reduces tyre wear. Activation of the ASR system is indicated by a flashing indicator lamp in the instrument cluster.
The ESP system means the Electronic Stability Program. If the ESP lights on the dashboard permanently the ESP system is faulty. You must access the ESP Electronic Control Unit (ECU) memory for pull out all DTC (Diagnostic Trouble Codes), using diagnostic equipment connected to the data link connector of the car. Then you will be full informed about bad pieces (e.g.: front right wheel abs sensor interrupted, ...). After bad pieces replacement you will be able to erase all faults memored by ESP ECU, in other words reset the ESP system and turn off the warning lamp on dashboard.
Probably lost idle memory,all computer controlled keep it running for a period it should regain the idle memory if not make sure no rodent chew damage to wires to the throttle position sensor, if check engine light is on scan for faults.
hav u had tuneup n chec fuel injec-thats basic--now u probly shud perform a code scan 1st just to confirm the 02s-ther both found at each muffler manifold-they look like spark plugs n may be difficult to remove
It's possible that the diverter valve (DV) has failed. The OEM valve has a plastic diaphragm inside and it can crack. If this happens, the car will leak boost air and will lose power as a result. Go to www.audiworld.com, click on Resources, then Tech, and then go to the engine article about replacing/upgrading the diverter valve - it'll show you where it is and how to do it.