TPS will not stay at (0%)

Syclone0565

Syclone0565

CustomMulticades.com
Well still trying to figure out this sy's issues. I installed a new TPS today and still getting the same results. TPS % in TunerPro is flickering at 1-2%. I turned down the idle screw a little and it went to 0%. Finally I thought. Then I stabbed the throttle a little and it still settled at 0%. Nice. I put it in gear and the truck died. So I restarted it and then the TPS% was flickering at 1-2% again :rant:

Anyone have any ideas on what else could cause the TPS ro read anything but 0% ?
IAC maybe? Position shows around 38 at idle.

By the way, I now have NO hair left... :p I have now pulled it all out ...
 
gjp

gjp

another post whore
Re: TPS will not stay at (0%)

what rpm does it idle? Mine shows 4-20 iac pos at 0% tps and .59 volts
 
Syclone0565

Syclone0565

CustomMulticades.com
Re: TPS will not stay at (0%)

gjp said:
datamaster shows voltage
Click to expand...

OK, I have the datamaster file. I will check...................

ok the voltage shows .53 to .55

38-39 on IAC position

1-2 flickering TPS %
 
Syclone0565

Syclone0565

CustomMulticades.com
Re: TPS will not stay at (0%)

OK, unhooked the TCI controller and now it stays at 0% So, It must have something to do with the TCI unit. I am going to experiment tomorrow and see what I come up with.

Thanks
 
NecroWolf

NecroWolf

lost marbles member
Re: TPS will not stay at (0%)

doesn't the controler interface w/ the tps? got a ground loop? or voltage feed to it?
 
Syclone0565

Syclone0565

CustomMulticades.com
Re: TPS will not stay at (0%)

*** UPDATE ***

Was getting feedback or noise I guess. I actually tied into the TPS wires at the ECM including the TPS ground instead of the chassis or engine ground. All connections were made at the ECM instead of underhood and it seems to have fixed the issues. Thanks all for helping
 
critical

critical

meltdown
Re: TPS will not stay at (0%)

Messing w/ the idle screw is a no-no. the factory sets the throttle blades to what is called "minimum air". This is set to barely maintain an idle w/ the i.a.c fully seated, and disconnected.
This gives the ecm a full vacuum signal at idle. My tps was set at 1.25 volts at idle, as measured at the middle blue wire.
 
You must log in or register to reply here.
Top