The car runs pretty good at WOT, but it shifts early at about 4500 rpms and when just cruising the car seems to hesitate through shifts. The car is an A4 and it gained a ton of throttle response but it acts like the tranny is slipping. Any ideas?

 

Sounds like you didn't hook something back up or the throttle cable may be kinked somewhere.

 

I'll double check today once it stops raining. On my way to work this morning I noticed that it seems to shift the gears really fast. 1-2, then 2-3 within a couple of seconds.

 

I am not positive on this.However,I believe you need to reprogram the PCM.Premature trans failure will result.A good reason to sell the Hypertech.

 

Did you slot the holes in the throttle position switch? to adjust it. and get a tune..

 

Close down your tb blades a little bit and that should firm up your shifts, then adjust your tps voltage to .65 or if you have a value you like better. What can happen is if the tb blades are open too far the tps will zero the % when you turn the key on and you stick your foot into it you have a larger throttle opening compared to stock and it doesnt turn up the line pressure because it isnt getting an accurate reading of how much throttle (airflow) the car is recieving. There are also a few parameters you can change in the computer, but i think the hypertech will up the line pressure for you if you program that in.

 

I'm not sure on how to do this, is there a post with a step by step how to?

Ya I don't think that it's getting enough line pressure cause you can barely feel it shift. How do I adjust the throttle position swith?

 

You can slot the tps sensor to adjust its reading just probe harness with a needle and use a multimeter if you dont have a scanner car doesnt even have to be running.

However you will have much more dramatic results if you close the throttle blades some by adjusting the throttle stop screw and making the blades go farther shut. It will do no harm, it will only make your iac motor a little farther open and you will have to do the proceedure on shoebox's website to reset it before driving.

 

Alright so I just found this one http://www.golenengineservice.com/html/tps.html if I get the tps volts to .65 - .67 should this fix my problem or is it something else?

 

Ive said it twice already adjust the screw on the drivers side of the tb that contactsthe throttle cam so that the throttle closes just a little farther than it does now at idle FIRST say 1/4 turn. It may cure your problem straight away. The tps sensor works fine in a range of something like .30-.90 volts. I dont know how to say it any clearer than that, stop worrying about the tps, thats a secondary adjustment and doesnt have a huge effect on firmness, although it will effect, but not to the same extent in my experience.

I had the same problem with my current build, i thought i took the trans out with the new motor. I couldnt stand driving the car it was so mushy.

 

I plan on doing that first as soon as I get out of work, I let everyone knows what happens. By the way the throttle body is a ported stock one, I don't know if that makes a difference or not.

 

Mine is a stock unit modified by LPE, to 52mm.

 

Alright so I closed the throttle blades a little and it still drove the same. Kept playing with the scew but no change. So I checked the volts coming from the tps and it showed .79. So i modded the tps and it got it down to .67. It seems to run alot better but the shifts are still wrong. 1-2 is fine, 2-3 seems so shift too early, and 3-4 seems to hesitate alot. All the shifts seems to be soft, the only way you know it shifts is by watching the tach or hearing the motor. Should I just put my stock 48mm tb again or does anyone have any other suggestions?

 

When I put on my 58mm I played with the tps, not by voltage just by sop, until the tune arrived in the mail. I got close but not perfect. the tune cleared up all problems. and I have a useless hypertec for sale

 

You likely didnt close the blades far enough to do the job, try going further something on the order of 1-2 full turns in from where you were originally. In my experience upping the tps voltage will firm the shifts, rather than what you described doing by reducing it. I've tried everything from .5-.9v there is a difference but its not that great in my experience.