just ading somethin. i got this chip that i put in my car awhile ago and when its in the idle is really irratic and usually stals first time you start it. and it also runs really rich. but when i take it out everthing appears to be fine..... well kinda

when what im gettin at is that do i need to change the tps to suit??? as its been metioned previously. or is it that my chip is just rooted

What is this chip you speak of?
The only chip that will ever make its way into my car is rotten maccas one stuck between the seats.

hahaha yer it looks a bit like that. lol its from hypertech. i got it from ebay for 50 bucks. it worked once whenb i first put it in my car but i couldnt notice any difference in performance because my tranny was rooted but once i got it fixed i stuck it back in and it ran like poo

Oh god.
Rip it out and throw it away. They are no good. From what i understand all it is is a $2 resistor that you splice into the MAF (?) harness that tricks the ECU into dumping more fuel in.
They have been around for a while.
There are much better ways to get more performance out of your 5.0L.

Jeff

nar its not a dodgy resister thing it plugs into the back of the ecu

lol resisters are like 2 cents hahaha and my old man has s**t of em. hey btw what mods have you done to your car

yer it got a diode aswell

Hypertech don't make anything to suit aussie EEC's so that's likely the problem. Of course I don't which EEC you're using?

I've got my auto tps set to 0.98 and the other to 0.97.
What would happen if they were set back to say 0.8 or 0.9?
Just get a lag? no real benifit is there?
Reason I ask is that I still occasionally get a violent couple of surges which lead to a stall when turning the engine on?

Have a look at your engine TPS volts when you start. You may be experiencing a surge over 1v momentarily on startup?
You'll probably not notice if you drop your TPS back to .97 for the engine but dropping it back to .8 will likely be noticeable.

on a v8 auto the engine tps is the one on the top and the auto tps is the one on the bottom, correct?

Followed the above.. well the base idle bit so far, haven't got around to TPS yet due to lack of multimeters.. But it fixed all my woes!!

Idle was sitting around 600rpm. Up-ed it to around 900rpm. No more hunting at idle. No more stalling when coming to a stop.

Thanks to all for this sticky!!

I have a few questions on setting the TPS on EF XR8.

I've done the base idle, set it to somewhere between 850-900 when warm.

Pierced the green wire and black wire, hooked the probes up, but the reading was 5v. This was with ignition at II. When the ignition was at I, the reading was around 0.57. Would this just be a grounding issue, or something mechanical?

Regardless, on the engine TPS, the screw holes don't appear to be elongated at all. I loosen the screws, but it only moves 1-2mm at most. Is this normal?

Also, where's the other TPS module for a manual?

Thanks!

Manuals only have one TPS.
You have to elongate the holes yourself.

is this the same on a 93 5lt

Yes.
Exactly the same from EB to EL
Brett

thanks brett ,ive got a reading of 0.2o havnt tried to slot holes yet ,throtle bodie has been adjusted wound this cause a low reading

So hang on a minute, if i'm reading correct, currently i have two TPS's on my T/B, i have changed to manual, can i get rid of the bottom TPS? Or will it not matter? Also, how do i go about timing the engine itself, i have taken the dizzy etc out and need to re time the motor. I know about taking the #1 plug out and cranking til the piston reaches the top. But i need to know how to time it using a timing gun etc. Cheers

Yes.