When air conditioner is on the trucks acts like it is dying & sometimes does.. if you punch the gas to the floor it recovers and goes to normal. does it at red lights/stop signs more than while driving, but still does it while driving. ive set the idle up & replaced the fuel filter..need help!!!
Could be because the alternator is not charging properly (failing), and/or because the battery is weak.
SOURCE: 2000 chevy silverado 1500 4.3 eng
Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.
SOURCE: Idle drops really low then returns to normal afew times b4 cutout
my buddies 94 350 has been doing the same thing for years i think its in the computer i would say youll probably have to live with it
SOURCE: Rough idle
I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.
SOURCE: gas not getting to engine
sounds like your fuel pump, normally fuel pumps die gradually not just like that, so best check fule pump fuses first, also i can not remeber if these have a fuel cut off switch, this is normally located arround the fire wall it looks like a red or black rubber button, if you have one you can press that and see if that sorts it, if not then it more than likley is the fuel pump and will possibly need replacing, but check the other things first, better a new fuse than a new pump...hope that helps a bit
SOURCE: 2005 silverado lt 6.6 duramax diesel turbo..engine
Before we do anything else lets do a fuel pressure check to make sure the pump is a-ok as well as the fuel pressure regulator. Your gonna need shop manual for this as well as a fuel pressure tester. If all checks out then move to the Turbo code.
Turbo code looks like the waste gate is stuck open and your not building the boost. Do a visual inspection look for any signs of overheating and bearing wear. Check or change oil as needed.
With regards to the Mass air flow I believe you have to replace it. Keep in mind this thing might be the root of you whole problem.
I strongly suggest you use the shop manual for the codes you got. it will make this repair a snap.
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