1998 AUDI A4 Vehicle Speed Control Problems

1998 AUDI A4 2.8 - DRIVING ALONG HIGHWAY, IN 7 DEGREE TEMP, CAR STARTED ACCELERATING ( FEELS LIKE IT IS DRIVING ITSELF) EVEN AFTER FOOT WAS REMOVED FROM PEDAL AND FULL FORCE HAD TO BE APPLIED TO BRAKE TO STOP THE CAR AT WHICH POINT IT WENT INTO HIGH REV AND ENGINE WAS IMMEDIATELY TURNED OFF. MECHANIC COULD FIND NOTHING WRONG. THIS CAR ALSO HAD 2 SIMILAR INCIDENT (ONCE WHEN NEW) AND ONCE A NUMBER OF YEARS AGO. AFTER MUCH BACK AND FORTH WITH AUDI, THEY TOOK THE CAR IN, AND SAID THEY COULD FIND NOTHING WRONG. AS A PRECAUTION I HAD THE CRUISE CONTROL DISCONNECTED AND THE THROTTLE BODY CABLE REPLACED SO FELT THE CAR WAS SAFE. (ALL AT MY EXPENSE) *TR

PROBLEMS WITH THE 1998 AUDI A4 ACCELERATING SUDDENLY WHILE DRIVING DURING SUB ZERO TEMPERATURES. ***NO ANSWER REQUIRED***. *MR *NM

THIS INCIDENT HAPPENED IN INDIANAPOLIS INDIANA AROUND 11:40AM THE TEMPERATURE OUTSIDE WAS TWO DEGREES FAHRENHEIT. I WAS DRIVING MY 98 AUDI A4 2.8 QUATTRO NORTH ON A TWO LANE CITY STREET WITH A SPEED LIMIT OF 35MPH. I HAD BEEN DRIVING FOR TWENTY MINUTES AND SMELLED A VERY POWERFUL GAS SMELL SINCE I STARTED DRIVING. MY FOOT WAS ON THE GAS AND ALL OF THE SUDDEN THE ACCELERATION OF MY CAR INCREASED TO 45MPH. I TRIED BREAKING TO SLOW THE CAR DOWN AND THE BREAK PEDAL RESISTED MY EFFORT. I WAS ABLE TO SLOW TO 40MPH BUT NO LOWER. WHEN I TOOK MY FOOT OFF THE BREAK THE CAR ACCELERATED GREATLY. DESPITE BREAKING, THE SPEED KEPT INCREASING. I FELT I HAD NO CONTROL OVER MY CAR. I WAS TRAVELING FOR OVER A MILE AT SPEEDS REACHING 60MPH ON A 35MPH SPEED LIMIT. I APPROACHED A RED LIGHT, LUCKILY IT TURNED...

IN EXTREME COLD WEATHER THROTTLE MAY UNEXPECTEDLY FAIL TO RETURN TO IDLE WHEN THE ACCELERATOR PEDAL IS RELEASED, MAKING IT VERY DIFFICULT TO STOP THE CAR. *AK

1998 AUDI A4 QUATTRO 2.8 ACCELERATOR THROTTLE STUCK OPEN THIS WINTER SEVERAL TIMES CAUSING AN ACCIDENT AT MY HOME. *JB

MY AUDI A4 AVANT 2.8 QUATTRO 1998 ACCELERATES ON ITS OWN IN COLD TEMPERATURES ( BELOW 15 DEGREES F ) AND TWO DEALERSHIPS FAILED TO FIND THE PROBLEM SO FAR. IT HAPPENS WHEN THE ENGINE HAS WARMED UP PARTIALLY, BUT HAS NOT REACHED IT'S OPERATING TEMPERATURE YET. *JB

THROTTLE STICKING ON ACCELERATION IN SUB-ZERO DRIVING TEMPERATURES. BRAKES ENABLED ME TO STOP CAR AND SHUT OFF ENGINE. IF I TOOK MY FOOT OFF THE BRAKE, THE CAR RE-ACCELERATED TO THE STUCK POSITION. ONCE THE ENGINE WAS SHUT OFF, ENGINE HEAT EVIDENTLY MELTED THE ICE AND IDLE SPEED RETURNED TO NORMAL. HAVE SPOKE TO OTHER AUDI OWNERS AND THEY HAVE EXPERIENCED SIMILAR STUCK THROTTLE PROBLEMS IN SUB-ZERO DRIVING TEMPERATURES. INDEPENDENT AUDI REPAIRMEN HAVE SUGGESTED THE PROBLEM IS CAUSED BECAUSE THERE IS NO SOURCE OF HEAT (EXHAUST HOSE ROUTING OR ENGINE COOLING ROUTING) NEAR THE THROTTLE PLATE AND THERE IS NO FIX OR REPAIR TO THIS DESIGN PROBLEM. IF A CRASH OCCURS, THE ENGINE HEAT MELTS THE ICE BUILDUP BEFORE A CAUSE OF ACCIDENT CAN BE DETERMINED. WHEN I CONTACTED AN AUDI DEALERSHIP TO ASK IF THIS IS A PROBLEM WITH OTHERS AND TO GET REPAIR ADVICE, THEY WERE UNAWARE OF...

CRUISE CONTROL INOPERATIVE.DURING HIGH SPEED BRAKING CAR SHIMMIES AND HOPS. PROBLEM BEGAN AFTER SERVICED BY AUDI AS PER AUDI BRAKE RECALL. IN THE LAST 12 MONTHS MY AUDI HAS SPENT 2 MONTHS AT THE DEALERSHIP FOR REPAIRS. THIS VEHICLE IS A LEMON.*AK

BOLT FOR CRUISE CONTROL SERVO FELL OUT RESULTING IN SERVO BECOMING WEDGED IN ENGINE AREA AND CAUSING SUDDEN ACCELERATION OF THE VEHICLE ON HIGHWAY. YH

AFTER DRIVING ON THE HIGHWAY IN THE RAIN, WHEN BRAKES FIRST APPLIED, THE CAR ACCELERATES, THEN BRAKES AFTER 1-2 SECONDS. THIS IS VERY UNNERVING AND THE DEALER SAYS AUDI KNOWS ABOUT THIS BUT THERE IS "NO ADVISORY OR TECHNICAL BULLETIN TO FIX IT" PLEASE HELP. OTHERWISE, THIS CAR IS ONE OF THE BEST.*AK