two days ago my car suddenly started acting like it had bad gas in it . on 1996 Volvo 850

i've tried,new gas,injector cleaner.and tried cleaning the mass air sensor now it starts runs a couple of minutes then stalls do you think it is still the sensor?if i tap on the sensors housing while it's running the car runs differently is this normal?

by in Penn Yan, NY on July 27, 2013
1 answer
ANSWER by on August 20, 2013
TRY CHECKING THE FUEL PUMP RELAY .LOCATED IN THE ENGINE COMPARTMENT VERY TOP LEFT UPPER CORNER BELOW THE WINDSHEILD.REMOVE THE 4-TORX SCREWS AND COVER. RELAY #103 RED. IF ITS THE ORIGINAL RELAY IT WILL HAVE A DATE.REPLACE IT .