TPS Voltage

[1320nut]

Having a hard time with my 1990 454ss what is the tps voltage supposed to be? my factory manual says 1.25 to 5.0 at WOT I have a poor running condition thanks in advance

 

[SAATR]

Sounds like you have your answer. What voltage do you see during testing?

 

[1320nut]

I guess what I should have said, is I can only get .88 volts at idle, didn't know what everybody else was getting?

 

[PlayingWithTBI]

My 5.7L is ~.45 Volts according to TunerPro and that's why it shows my TPS % at -1.

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According to this guide you should have .58 - .59 VDC

TBI tuning-website - Tuning the TBI.pdf

 

[Supercharged111]

Is the TPS adjustable on the TBI? It isn't on the Vortec, you just do a recal so the motor knows that whatever it is at an idle is what it is at an idle.

 

[PlayingWithTBI]

Is the TPS adjustable on the TBI?

Some are - the mounting holes are slotted. On others you have to drill out the holes a little. It's explained in the link I posted.

 

[sparky]

ive had to bend the tab on some throttle bodys

 

[sparky]

ive had to bend the tab on some throttle bodys

 

[sparky]

did i stutter

 

[PlayingWithTBI]

did i stutter

yep, ha ha!