Thread: About ready to cry..PLEASE help

Originally Posted by TDCRacing

That would have to be one hell of an intake leak to cause issues like that. Now as far as the fuel trims it doesent take much for them to go to -16 (In her other post she says, "The long term fuel trim is pegged at 16.4"). If it was that it would have to be huge wich means anybody with a set of ears could probably hear it.

You would think you could hear it but when this happened on mine there was not the usual vacuum leak hissing sound. I kept tuning my LTFTs and they kept staying + no mater what; and then one day they pegged to +14 - +16 that's when i knew i had a problem and needed to find it. Turned out to be the EGR tube. It cracked about 1/2 way around the tube where it met the intake manifold. They don't always crack like mine did, some can be cracked worse some not as bad. Either way if it is cracked it is bad and needs to be replaced.


I can unplug the vac line off of my car straight off the lim intake and there are barley any changes in idle...just idles a tad higher is all...and of coarse the trimms are out of wack

Like you said, it doesn't take much to get fuel trims out of wack. At the same time it is possible for your system to account and adjust for smaller vacuum leaks. Your system will have quite a bit of a hard time adjusting for a larger vacuum leak.....IF it will run at all.

The only thing that is interesting to me is she had the engine "smoke tested." If so a cracked EGR tube would have showed up then.

Keep us informed and let us know how its going and/or what it was.