I checked my TPS voltage and reads at 1.08 i know it should be below 1.00.Do you guys think this might be the cause that she won't fire-up.

 

no

check for fuel, spark, spark plugs, vacum leaks, battery voltage (must be above 9.6v)

if all of those come out fine, then you need to get the truck scanned for codes.

check for compression, leak down tests etc. if you have the tools to do it, if not call up your svt road side plan and get it towed into the dealer.

remember to remove all of your mods before you get the truck towed

 

Yes your TPS voltage should be set below 1V. About .96V is good.

 

Stock mine was 1.07 volts and it ran fine, but when I put the single blade TB on I set it @ .99.

 

Mines set at .97. Is the voltage really that critical?

 

WTF is....TPS voltage???

 

THROTTLE POSTION SENSOR

 

Thanks....how would I go about to check mine?

 

I can’t speak about this “specific” application because I do not know what the tolerance is for the TPS.

However, I have designed a lot of automated test stations that use data acquisition as the prime source of controlling the software I develop.

To put this into terms that may be easier to understand there is basically only two types of sources used to tell the computer what is going on, be it in my test stations or in a vehicle computer.

The two sources are voltage and resistance (sometimes current, but not often). Your temperature reading you see inside the truck is based off a “resistance” reading inputted into a chip which then translates that into a “temperature” reading that you can understand. (if the resistance is off enough you will get an inaccurate temperature reading)

Same for the Throttle Position Sensor. The computer has a voltage input that tells the computer “where” the Throttle Position is. One person may have a voltage reading of .97vdc that tells the computer the sensor is, for example, at its home position. Another person may have a voltage reading of 1.02 that tells the computer the sensor is at its home position.

This should have been calibrated at the factory to allow for tolerances.

Now, if your truck came from the factory calibrated at .97vdc for home position for the TPS and for some reason it has changed and now puts out 1.02 then the computer “thinks” it is NOT at its home position, but rather at some other position. However, as I have said I do not know this application and its tolerance so it could be that “home position” is anywhere from .95vdc to 1.00vdc.

In any regards with it comes to inputs into the computer and dc voltage a few tenths “could” mean the difference of a good running vehicle and a bad running vehicle.

Another example would be to use a 10” ruler and divide it such that 1vdc = 10” thus 1” would be equal to 0.1vdc, 2” = 0.2vdc and 10” = 1.0vdc as you can see in this example a 0.1vdc can make a big difference.

 

Go HERE.


Then thank clonetek.

 

Thanks for the link...Nice write up!