throttle position question

[baxsom]

not sure if this is in the right forum or not but here goes

my pocketlogger says that my throttle position when i press the gas pedal all the way down is 74%. when i take my foot off of the pedal it always goes to 11%
back down 74

is this normal and i guess that if the numbers are correct then WOT is really only about 3/4 throttle then


there is about 1-1 1/2 inches of play in my throttle cable

 

[Tongboy]

there is about 1-1 1/2 inches of play in my throttle cable

have you tried having someone floor the pedal and check if it fully opens with the car off?

if you've got that much slack the pedal might be hitting the floor before its getting the TB all the way open

 

[baxsom]

havent tried looking at the butterfly yet
taking the IC piping off is such a PITA that I wanted to wait until my new throttle body came in so i could do it all at once


is there an average percentage for WOT on a pocketlogger

 

[4sfead]

When you go WOT the Pocketlogger should show 100 percent throttle position. Check your cables and make sure its not too loose.

 

[Tongboy]

havent tried looking at the butterfly yet
taking the IC piping off is such a PITA that I wanted to wait until my new throttle body came in so i could do it all at once


is there an average percentage for WOT on a pocketlogger

why take any of the piping off? just check if its hitting the wide open stop on the outside of the throttle body. twist it with your fingers to full open and note where that is and then have someone step on the pedal and see if it goes to the same place, problem solved without getting a single tool out

 

[SpoolnTsi]

Yes check and make sure all your cables and everything on your TB is how it should be. Make sure theres nothing blocking the pedal from going as far as it should inside the car. If all else fails then your TPS is going bad. It should read 100% at full throttle

 

[baxsom]

cool
i read somewhere (alzheimers kicking in) that a tps will never read 0 or 100 so i wasnt sure what it normal
there is about 2 inches of play from center in the cable
now that my new ported TB is in i can fix it all at once

 

[laxdudeee]

it should read 10% w/no compression of the pedal. To finely adjust the % readings you twist the TPS on the 2 screws that holds it to the TB and just verify with the logger that it is reading 100% but it has to be something with your cables if it is only reading at 74% that a new TB will most likely not cure.

 

[steve]

it should read 10% w/no compression of the pedal. To finely adjust the % readings you twist the TPS on the 2 screws that holds it to the TB and just verify with the logger that it is reading 100% but it has to be something with your cables if it is only reading at 74% that a new TB will most likely not cure.

Gee, that's not even correct on a 1G much less a 2G 420a.

Steve

 

[baxsom]

i wasnt replacing the new TB because of the position sensor
i got one bored and powdercoated.
i was going to adjust the cable until i can visually see the butterflys all the way open
and the logger said 100%
like i said earlier there is a lot of play in the cable
so that is probably it
because i consistenly get 11% on the logger when the pedal is not pressed i think that the tps is ok

i just wanted to wait until i was already putting the new TB on to fix it so i didnt have to wrestle with the IC piping twice

so basically if the butterflys are all the way open visually then it should read 100%????????

 

[steve]

Just to make sure! We are talking about your 96 Eclipse N/T (w/turbo), right? It has a 420a that you turboed, right?

Three things are important here.

First and most important:

There should only be 1mm to 2mm of slack between the end of throttle cable and the pulley on the butterfly. How you might have an inch of slack is baffling.

The manual says to start the car up and get it to normal operating temp and speed.
Turn the car off.
Turn the ignition on but don't start it for 15 seconds to initialize the IAC motor.
Turn the car off
Loosen the two bolts on the intake holding the throttle cable adjustment plate.
Move the plate to the point where the throttle butterfly pulley just starts to turn from tension on the cable.
Back off the adjustment plate untill you have 1-2mm of slack and tighten the bolts to 3.6 ft lbs.

Second:
Check that when the gas pedal is on the floor that the throttle butterfly is fully open.
If it's not then check for problems with how far the pedal goes, don't change the cable adjustment to make it open more, than not where the problem is and you only make the throttle stay open at idle.If you can't fine a problem with the pedal linkage inside the car then that's how far your throttle will open.

There first two apply to both a NT and Turbo 2G

Last:

Adjust the TPS.
On the 420a it looks like the TPS is fixed. and I don't find a reference to a IPS.

2G 4G63 need to go look up my post on how to adjust the IPS switch in the TPS.

Steve

 

[baxsom]

thanks
that helps
yeah i can grab the cable and wiggle it a full inch of center
when i put something on the pedal so it goes all the way down
i can manually move the butterflies about another half inch towards open
got to be an adjustment problem somewhere

i am installing my bored TB this weekend
so now at least i know how to make sure it is good to go

 

[polarmoment]

i plugged my pocketlogger into the work car today (99 eclipse NT). got roughly the same readings- 13% at 0 throttle, and 76% at WOT. it's probably just a quirk in how the logger reads the data. can anyone else confirm these #'s on an NT dsm? i wouldn't be surprised if they all read that way.