after I got the stall put in, my truck has been running funny, it serges at idle. I got a narrowband for now(got a wideband on the way) but when it warms up the narrowband either sticks on rich and dosnt move or it stays on lean and lights the whole narrowband up like it dont know wtf its doing. could the o2s be going out? also seems like the truck just runs like **** all around and drinking gas like crazy! my truck has like 102,000 miles on it, stock o2s, plugs & wires. What do you all think?

 

regardless if those items are the problem or not you need to at least replace the plugs, and o2's with that mileage

 

Who did your tune?

 

First thing I would do is if you are using one of those narrowband gauges that has the little bars that lights up based on your narrowband sensors I would take that thing and throw it in the trash because that's what those things are worth. If you are going to have any kind of gauge to measure your afr get a wideband or nothing at all.

 

Can you describe the surge? typically a surging engine is lean, not rich. It sounds as thou your 02's are not switching, which so throw a code, is the check engine light on?

 

Dynospeed in Memphis TN, which they did a complete shitty job i must say.


it dose it when I slow down. its like the engine dies then jumps back up to 1000 rpms and kind of sounds like its overloading real bad then it clears up. ad if you let it sit and idle for any period of time it sounds like its overloading real bad gets to shaking the truck back and forth. you can watch the rpm gauge jump up and down a few hundred rpm.

 

That sucks about the bad tune man, I would have to say that more than likely has alot to do with whats going on with your truck right now. Did they tune all your part throttle stuff for everyday driving or just throw it on the dyno and tune WOT?

It could be a number of things, ve table could be way out of wack, idle airflow, etc....

 

they made 4 runs on the dyno at WOT. 450$ I wish i never would have spent, oh well, you live and learn I guess

 

same thing mine did. You need to redo your VE table and decrease your throttle follower in each gear. That fixed me right up.
At first I only did 1st gear and realized it got better at stops but coming to the stop it would surge like that. Decreased the other gears and it's just dandy now.

 

was it a small diameter converter?