I am getting ready to install an Accufab SBTB. I am going to get it tuned shortly after the installation. Do I need to adjust something on the TPS or do I just swap out the throttle bodies and transfer the stock TPS to the Accufab. I am just wondering because I have read that some people have had problems with the TPS voltage when going to a SBTB.

 

In my expereiences - anytime you swap a part for something not "OEM," - you need to plan on checking out all other connecting devices. I didnt check the TPS voltage "before" I put on my Accufab SBTB - so I don't know if it made a difference or not - but I did check it afterwards just in case and found it reading about .94 volts - so I adjusted it to about .98 - .99 volts.

 

Ya what he said, YES you must adjust it

All I'll add is dont sweat it, the truck will run flawless without adjusting it too, (BUT YOU MUST CHECK IT JUST IN CASE).

Here's a very old pic, maybe it'll help ???

 

So should the voltage be the same for modded L's with a lot of power???

 

Yes Yes Yes
Voltage is the same for any and all L's using an aftermarket Single Blade TB
As I said dont put too much into it, the truck will run flawless even if your a bit out, but there are rare ocassions where being alot out did cause problems,
hence the reason you must check it.

 

Thanks for all the info fellas. This will make me feel better about the swap.

 

Well I tried to adjust it. The best I could get it to was 0.882. I tried fiddling with the idle screw on the TB and was able to get it to 0.99, but the idle was way high at like 1200 RPM's. Is 0.882 okay or should I try something else???

 

The first thing you should do is adjust the stop screw so that the throttle blade is fully closed but not sticking at idle. Then carefully bore the TPS screw holes out to about 1/4 of an inch. That should give you enough adjustment room to set the TPS voltage correctly.

 

Assuming your meter is reading accurately, I think I'd want to be closer to .98 - .99 volt than .882. As mentioned, most of us had to "slot" the TPS screw holes a bit to get sufficient movement to be adjusted to proper voltage. I didn't touch the idle adjustment screw - just slotted the screw holes a bit - and got it to about .98-.99.

 

Ive had high idle problems with my accufab since day 1 it and the pro-m meter have almost made me burn the truck many times

 

Chances are, the throttle blade isn't adjusted properly. Once you get that set to where the throttle blade closes completely all the way around your idle should drop. If it doesn't drop enough you can also reduce it a little more through your PCM using a hand held tuner like the Predator.

 

That is why I sold my AccuCrap and went BBK. I think any other throttle body manufacturer would be better. I took mine directly to Accufab and they told me the reason it idles so high is because the throttle body makes so much more horsepower. I did work the blades and the throttle stop but was never able to set the tps at .99 and have the idle below 850 to 950 rpms.

You can have a tuner adjust the idle for you via programming, but why should you have to. For $500.00 this throttle body should sing for me in the shower and not require me to get a tune on a stock truck just to adjust idle to normal, )Rant off)

Good Luck with yours.