Low idle, random shut offs, almost stalling

[Brycenneal2013]

I have a 2003 chevy tahoe 5.3 about 139k cia, when I go too drive the car an approach red lights the rmp will drop the volt will drop low as if I had my system turned up, the secondly when I'm driving in reverse backing out of the drive way if I don't stay on the gas the car will die when you go to switch into drive..throttle body was replaced about 2 years ago along with the fuel pump an filter. A guy had told me it could be my throttle sensor due too the car idling so low. If I remember right he said it was idling about 5-400 specially with the heat or a/c on. Anybody have any ideas ?

 

[OR VietVet]

Get throttle body cleaner and MAF cleaner at the parts store and follow the instructions. Any CEL?

 

[Brycenneal2013]

Get throttle body cleaner and MAF cleaner at the parts store and follow the instructions. Any CEL?

Tried that, only thing I haven't cleaned yet is the air cleaner

 

[rippinitup]

ive had that same problem everytime my battery died. it will last for a couple days than idle normal again. may be a bad battery.

 

[Brycenneal2013]

ive had that same problem everytime my battery died. it will last for a couple days than idle normal again. may be a bad battery.

Hmm I have had it for awhile didn't even think about that it does take a lil longer too start , I'll get it tested in the morning appreciate it

 

[SLCHOE]

ive had that same problem everytime my battery died. it will last for a couple days than idle normal again. may be a bad battery.

Hmm I have had it for awhile didn't even think about that it does take a lil longer too start , I'll get it tested in the morning appreciate it

Well worth a look. It may not be just your battery. You mentioned a "System" and I assume you mean an amplified audio system. I would check:

1) the static voltage at the battery. Engine and key off. (no loads at all.) Should be 12.4V+

2) turn on the key and turn on the headlights, blower motor and your system. If it drops below 9 volts within a few seconds, your battery is done.

3) start the engine and check charging voltage at the battery (all loads off again - engine running). Should be 13.6v+

 

[Brycenneal2013]

Well worth a look. It may not be just your battery. You mentioned a "System" and I assume you mean an amplified audio system. I would check:

1) the static voltage at the battery. Engine and key off. (no loads at all.) Should be 12.4V+

2) turn on the key and turn on the headlights, blower motor and your system. If it drops below 9 volts within a few seconds, your battery is done.

3) start the engine and check charging voltage at the battery (all loads off again - engine running). Should be 13.6v+

You were right. Pulled rb3 throttle body it was crazy dirty lol cleaned it up it runs perfectly now. Going too do plugs next weekend. Thanks!

 

[ccapehartusarmyINF.(ret)]

when you get new plugs dont waste yer money on the fancy ones