[J.W.H.]

Okay, guys..I need some help. What should the 5.3 idle at after being at operating temp. I have an '01 Tahoe, stock motor with 60,000 miles on it. A few days ago, it wouldn't start very well after sitting for a while. It would turn over and run for a count of 10 or so then die. After I let it sit for a minute, it would start normal. I cleaned the throttle body and it is starting fine now, but it is idling at 450-500 rpm's. I can't remember if that is correct or not. It doesn't bog down when you stop at lights, but it just seems to be hardly running. Sorry for the long post, but I just need some input. Thanks.

Jeremy

 

[jebx]

Is it running rough at all? Lowered gas mileage? Serivce engine light?

One thing to check the fuel pressure regulator. It is in the fuel rail on the drivers side, turn the key on, and pull the vacumn line off. If gas comes out it's bad.

 

[J.W.H.]

No, there isn't any warning lights showing and it is running fine. Is that rpm range too low for it to be idling at or I am fine. Thanks.

 

[BACKYARD88]

Does it have the dive by wire system? GM has been having a few problems with these throttle bodies. There are bulletins for the cable operated ones also though.There are fixes ranging from cleaning to reprogramming to installing little plugs in the throttle plate.450-500 rpm does seem a little low.

 

[Hit Man X]

~500 is correct. I had my idle bumped to like 575rpm.

How about the Fuel Filter? Is anything else blatently wrong under hood?

 

[J.W.H.]

Well, I had the fuel filter changed about 6500 miles ago so I don't think that is it. I know I am not giving ya'll much to go on here, sorry. Hitman, how do they bumpthe idle up? Is it a computer flash or something? Thanks guys.

 

[Hit Man X]

Well, I had the fuel filter changed about 6500 miles ago so I don't think that is it. I know I am not giving ya'll much to go on here, sorry. Hitman, how do they bumpthe idle up? Is it a computer flash or something? Thanks guys.

Yup I had it done in the tune.