Classic Fast - TPS values @ WOT inconsistant

[Blazer406]

I am not sure if this matters.... or is normal or not.....

Clasic FAST Sequential..... LC2...... stock TB and TPS

On the datalog.... when you nail it.... it goes to like 80%.... then one frame later... (0.05 sec)...it is like 65%.... the 75%.... then 80%.... fluctuating bewtween 60% and 85% duting the entire run.

I would think it would stay at 85% the entire run if that is what WOT is.

I don't see any way to rescale the TPS calibration on the classic box..... like the XFI has....

Is this normal?

 

[HighPSI]

What does it read with key "on" car not running? The TPS value isn't extremly critical except for "clear flood" needs to be over 80% and if the TPS is changing rapidly it could add some TPS AE Fueling

 

[Blazer406]

What does it read with key "on" car not running? The TPS value isn't extremly critical except for "clear flood" needs to be over 80% and if the TPS is changing rapidly it could add some TPS AE Fueling

It appears to be around 10% give or take....

The WOT fluctuates between 59% and 80%......stays mostly between 70 and 80 %.... with a few negative spikes down in the 60's.....

I might could fiddle with the TPS to try and get more spread......

 

[turbobitt]

It appears to be around 10% give or take....

The WOT fluctuates between 59% and 80%.

I might could fiddle with the TPS to try and get more spread......

That sounds like to much. Maybe try having someone fiddle with it while you have it at WOT w/key on engine off. Possibly bad contact in the connector or something.
Did you verify the cable is pulling the TB completly open ?

Allan G.

 

[Blazer406]

Here is a screenshot.....

 

[Blazer406]

That sounds like to much. Maybe try having someone fiddle with it while you have it at WOT w/key on engine off. Possibly bad contact in the connector or something.
Did you verify the cable is pulling the TB completly open ?

Allan G.

Will check that......

Just was noticing all the fluctuation.... and thought I would ask.....

Since that datalog....I've backed the timing down a couple degrees and fattened up the AFR target to 11.0:1.

 

[HighPSI]

I would verify everything with a multimeter. Verify the 5 volt referance isn't changing, verify the ground is good, and verify the TPS voltage at the meter matches the FAST TPS voltage. I'm suspecting the 5 volt referance may be bad. If it is, you can probably steal it from the dash vai the MAP plug

 

[Chuck Leeper]

being "zapped" w/ interference??