HELP! I think I got burned by a bad tune!

[nightfire]

I had the car tuned about a week and a half ago. I was disappointed with the results but that was because I was experiencing massive belt slip.

Since then, I've posted the dyno graph on facebook (mod motor mustangs) and it has been taking an absolutely ass-raping. Just about everyone is saying that it is the worst graph they've ever seen.

Mind you that this is through a stalled 4R70W automatic tranny.

How bad is it :cry:

 

[TanTop94]

That shit is all over the place lol

 

[Orange 94]

wow!

 

[g36 monkey]

Just looks like its not running smoothly at all

 

[Musturd]

That's a pretty nasty looking graph . What were the air fuels like ?

 

[nightfire]

That's a pretty nasty looking graph . What were the air fuels like ?

I didn't get to see the AFR's but he assured me that they are solid and a bit on the rich side for safety. Would the belt slip explain the erraticness (say it was crazy bad slip)?

 

[g36 monkey]

If you were slipping REALLY bad, I could see it making your numbers erratic

 

[nightfire]

It's slipping REALLY bad. The 3" pulley just doesn't like the stock 6-rib/tensioner. My tuner said that it was literally slipping off idle. 3" is coming off ASAP.

 

[RichV]

I have some power vs MPH graphs and they are not as smooth as power vs RPM.

Belt slip, MPH graph, and not seeing AFR is tough to diagnose a tune IMO.

 

[D3VST8R96GT]

Holy!!!

 

[g36 monkey]

I have some power vs MPH graphs and they are not as smooth as power vs RPM.

Belt slip, MPH graph, and not seeing AFR is tough to diagnose a tune IMO.

Good call on the MPH, didn't notice it, usually expect them to be RPM relevant lol