Engine Mechanical problem
1991 Audi 90 4 cyl Two Wheel Drive Automatic 150000 miles
PLEASE CAN U SEND ME ANY DIAGRAM OR PHOTOS OF THESE THINGS U LISTED?I AM POLISH AND MACHANIC NO UNDERSTAND THIS MESSAGE WERE THESE SENORS AND VALVE'S ARE?I VERY MUCH THANK U FOR THE MESSAGE AND I WILL BE DONATING UR COMPANY TOO?THANK U FOR UR QAULITE TIME?PLEASE HELP ME, BOB, KEN HAVE HIGH EXPERIANCE'S?THIS TICKING PROBLEM IS MAKING ME SAD AND UPSET?I VERY MUCH LIKE MY AUDI 90 2300CC 1991 5CLYDER?
Your problem could be one of the following:
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)
Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:
THANK U SO MUCH. BASIA
Tuesday, September 15th, 2009 AT 3:55 PM