2001 chevy tahoe idles rough!! please help

[amad20003]

I have a 2001 chevy tahoe lt...it has a rough idle...and also doesnt respond when i punch the accelerator...what should i do....i have replace the fuel pump....i have already clean out the tb...i have replace the fuel regulator...now my mechanic says that it is a bad intake gasket...can that be posible...or should i cleab the MAF first to see it that is it...please help i know i that alot of chevy tahoe owner have this problem and its frustrating....we take it to one and they say one thing we take to another and they say another..thanks for view and any commwnt would be greatly appreciated...

[maxwedge]

Welcome to AF, in the future post in the Tahoe/truck forum below. Rough idle can be caused by many things, ign misfire, bad injector, vacuum leaks. someone on site has to pin down the cause and/or scan for codes. Normally the maf would not cause this.

[j cAT]

first thing to do is measure fuel pressure with a pressure guage and do the pressure test proceedure.

pull all failure DTC codes and post all this info here before spending any more $$$$.

for your info these vehicles do not have idle issues.
how often do you replace the fuel filter/use injector cleaner ?



when did you last replace the PCV ? check these crankcase hoses as well.

could be you have bad, old, water, in the fuel.

a dirty MAF will cause slow throttle response NOT rough idle. what is the idle rpm ? should be 600rpm in or out of gear !

[amad20003]

Originally Posted by j cAT

first thing to do is measure fuel pressure with a pressure guage and do the pressure test proceedure.

pull all failure DTC codes and post all this info here before spending any more $$$$.

for your info these vehicles do not have idle issues.
how often do you replace the fuel filter/use injector cleaner ?



when did you last replace the PCV ? check these crankcase hoses as well.

could be you have bad, old, water, in the fuel.

a dirty MAF will cause slow throttle response NOT rough idle. what is the idle rpm ? should be 600rpm in or out of gear !

My truck doesnt reapond when i step on the gas peddal and it also
Idles rough and its below 600 rpm....i thinks its somewere 450 to 500... My mechanic said that it could be the intake gasket....i hava already fixed the misfire and also changed both cats already....fuel pump also has been replace.... Three of the eight fuel injector have also been replaced....i dont know what to do.....gave me something else please thanks. .

[amad20003]

Originally Posted by maxwedge

Welcome to AF, in the future post in the Tahoe/truck forum below. Rough idle can be caused by many things, ign misfire, bad injector, vacuum leaks. someone on site has to pin down the cause and/or scan for codes. Normally the maf would not cause this.

But doent the maf causea the truck to take about 5 seconds for the throattle to repond....

I have already fixed the misfire...its 3 of my fuel injectors...and i also replaced my cats alreadyand also my fuel pump....

CAN IT BE MY INTAKE GASKET.....OR SHOULD I TRY CLEANING THE MAF FIRST...TO SEE ID IT FIXES MY TRUCKS THROATTLE HASSITATION....THANKS FOR UR HELP...

[j cAT]

with your info now I would find a better repairer. this guy is an idiot or crook bleeding your wallet. do as I mentioned earlier. Get data do testing then this can be repaired.