TPS 0.54.... Impossible
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
The smoothness issue is more, one of the meter moving smoothly, as you steadily move the lever. With the TPS off of the car, I wouldn't be too alarmed by a 0.0 volt reading. The lever may retract farther than possible than when installed on the car and the wiper may slide past the end if the coil. This whole "test" from three pages back was to ensure that you didn't replace a fully functional TPS. I have personally witnessed where the TPS was mis-installed. The tang on the TB wasn't properly engaged in the TPS and the TPS couldn't provide the proper voltage readings, even though it wasn't defective. I'm just trying to help, here.
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Thread Starter
Pro
Joined: Apr 2006
Posts: 747
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From: Perth Western Australia
And helping you sure are CFI, i appreciate it a great deal.
the meter moves pretty steady with the lever movement... and when the tps is taken off the tb the little lever (on tps) moves up a fraction more, which i guess is the cause of the 0.0 reading.
ill do a test to make sure its getting the required 5v input tonight, if it is.... ill take a trip to the spare parts shop first thing tomorrow
the meter moves pretty steady with the lever movement... and when the tps is taken off the tb the little lever (on tps) moves up a fraction more, which i guess is the cause of the 0.0 reading.
ill do a test to make sure its getting the required 5v input tonight, if it is.... ill take a trip to the spare parts shop first thing tomorrow
Burning Brakes
Joined: Jul 2004
Posts: 806
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From: Langley B.C.
Originally Posted by CFI-EFI
I just hope it was mis-installed or it is something else easy and cheap.
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Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
A max of 4.6 (I hope your .46 was a typo) should be enough. Filing the slot to achieve a higher reading, probably wasn't necessary, unless you had to, to get the correct, .54, closed throttle setting established. Once the closed throttle voltage (.54 or whatever) is set the WOT reading will be what it is. The exact number at WOT isn't critical like the closed throttle adjustment. At WOT it just has to be high enough for the ECM to recognize as WOT and trigger the PE mode.
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Burning Brakes
Joined: Jul 2004
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From: Langley B.C.
Originally Posted by CFI-EFI
A max of 4.6 (I hope your .46 was a typo) should be enough. Filing the slot to achieve a higher reading, probably wasn't necessary, unless you had to, to get the correct, .54, closed throttle setting established. Once the closed throttle voltage (.54 or whatever) is set the WOT reading will be what it is. The exact number at WOT isn't critical like the closed throttle adjustment. At WOT it just has to be high enough for the ECM to recognize as WOT and trigger the PE mode.
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I meant the best at base was the same as Oz,.46..until I filed out the bakelite mount slot so I could rotate it a bit more to get .54
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Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by Great White North
Yeah i am a little hrd to understand I meant the best at base was the same as Oz,.46..until I filed out the bakelite mount slot so I could rotate it a bit more to get .54
I meant the best at base was the same as Oz,.46..until I filed out the bakelite mount slot so I could rotate it a bit more to get .54These ARE both 1989 and earlier cars, right?
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Last edited by CFI-EFI; Jul 27, 2006 at 08:21 PM.
Burning Brakes
Joined: Jun 2005
Posts: 754
Likes: 0
From: Tamarac Florida
Originally Posted by ozvette87
Please do let me know
Just wanted to give you an update. I put the new one in today and it works perfect now. The wires that come with it have gator clips on it so it hooks right up to the voltmeter and this makes it really easy to read the volts. Instead of doing what I was trying to do, sticking the ends of the voltmeter wires into the insulation of the TPS.
I had it adjusted in less than a minute and tightened the screws. It feels like a completely different car now.
Just be carefull of the screws. I took the top one out of the old TPS without a problem. But the bottom one looked like it had been messed around with alot. It was striped where it screws into the TB. So I had to break off the end of the screw to get the old TPS off. So right now I only have one screw holding the new TPS on. I know this won't last very long, but it'll have to do until I can figure out how to get the rest of the dang screw out.
Anyway just wanted to let you know the outcome and hopefully you'll get yours working good to. With both screws holding it in.
Good Luck,
JB
Burning Brakes
Joined: Jul 2004
Posts: 806
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From: Langley B.C.
Originally Posted by CFI-EFI
Strange. Is the tang from the TB properly engaged in the TPS? What is your WOT voltage? Do YOU have the full, 5 volt, reference signal? What do we have, here, a bunch of defective TPSs? I know my car is all different but my TPS is very close to centered in the slots at the correct voltage.
These ARE both 1989 and earlier cars, right?
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These ARE both 1989 and earlier cars, right?
RACE ON!!!
It was a standard brand ignition piece.Now the conector is on an upward angle!!!(I think I am going to get a Genuine GM) and see if it is just another bad, Made in Mexico part!!!
Thread Starter
Pro
Joined: Apr 2006
Posts: 747
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From: Perth Western Australia
thanks JBI, im gonna have to look into that a little more now that youve had success with it. i definitely need a new one me thinks.
bummer about the bottom screw, mine is also not as healthy as the top either, but still ok enough to unscrew.
you may need to take the tb off and use an "easy out" (not sure if they are called that over there) to get the leftovers out
also CFI, tang is definitely engaged
im gonna have to look into that a little more now that youve had success with it. i definitely need a new one me thinks.bummer about the bottom screw, mine is also not as healthy as the top either, but still ok enough to unscrew.
you may need to take the tb off and use an "easy out" (not sure if they are called that over there) to get the leftovers out
also CFI, tang is definitely engaged
Burning Brakes
Joined: Jun 2005
Posts: 754
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From: Tamarac Florida
Originally Posted by scorp508
There is a throttlebody screw kit that comes with new TPS screws. Sometimes the new sensors come with them too.
Thats the one I got. The top screw is now the new ecklers one, but I can't get the old bottom one out.
Oz, thanks I'll look up "easy out" and see what pops up. (that did'nt sound right did it?
)
Thread Starter
Pro
Joined: Apr 2006
Posts: 747
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From: Perth Western Australia
ha
yeah sounds dodgy.
pretty much, you -carefully- drill a small hole into the centre of the stck, stuffed bolt. then stick in a reverse tap (tap and die set) then, as youre tightening that, it should come out itself.
yeah sounds dodgy.pretty much, you -carefully- drill a small hole into the centre of the stck, stuffed bolt. then stick in a reverse tap (tap and die set) then, as youre tightening that, it should come out itself.
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Originally Posted by CFI-EFI
Remove the TPS from the TB and manually run the lever through the full range with a voltmeter connected. Does the voltmeter follow from ~.50 volts to ~4.5 volts, or close? If so the TPS is good and the tang on the TPS wasn't properly indexed into the TB lever. Reinstall the TPS, correctly, reconfirm it runs through the full range, and then reset the minimum air adjustment you've messed up.
Originally Posted by CFI-EFI
These cars do not have an idle screw. The idle speeds are burned into the prom, and through it, the ECM controls the idle speed by manipulating the IAC.
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Originally Posted by scorp508
Technically they do on the driver side of the throttle body covered with a rubber cap, we just should never have to mess with it.
Make sure you reset that to where its meant to be ozvette87, its pretty simple to do, then test your TPS the way CFI-EFI described above.
Originally Posted by ozvette87
anyways, getting a new one as soon as one is available here in west aus.
Last edited by Casethecorvetteman; Jul 28, 2006 at 10:53 AM.