2003 GMC Yukon "bad mass air flow sencer" Questions

mass air flow sencer and still i have the same problem, what could it be? the truck runs fine other than it wont idle??????? please help I know that this will sound Stupid. Change the Fuel Cap. If the

...or both of these. could have clogged fuel filter or weak fuel pump. timing off due to worn timing chain, if see check engine light flashing look for faulty MASS AIR FLOW SENSOR OR BAD TPS

...the O2 sensor has detected a RICH condition.  Your engine is getting too much fuel.  This could be caused by MANY different things, but the most likely cause is a bad mass air flow

mass air flow sensor was bad. please help Change the crankshaft sencer. If you are getting spark and fuel. and have a code for the mass air.  You problably have a mass air failure which can cause

...mass air flow, checked for vacume leaks, newer O2 sencer, at a loss were to look. John, did you change the spark plugs? there are test for hidden vacuum leaks--egr valves most common wher it attaches ...

...mass air flow sencer. all the fuses are good.. followed the hanes book on testing..no trouble shooting in the book...ohmed out more stuff then in know the names for..im gonna get a scanner and hope ...

...bad o2 sensor, but I can't figure out what sensor it is. There are 4 What was the code? When it tells you bank 2 sencer 1 that would be the passenger side 1st senser are you 100% sure it is o2 it ...

bad timing advancement but not throw a code. hope this helps,remember to keep it simple,expensive elec. parts are not always the problem might be mass air flow censor?  need to repaire  

how will the truck run with bad mass air flow sencer It will run rich I believe..