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Joined: May 2000
Posts: 1,187
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can we get some pics? i'm not exactly sure where the tps is?
-Speed Demon- Matt Black 2000 Contour SE Sport (duratec/atx)got body mods? all show, better than stock go  "I might be crazy, but I'm not stupid" speddmn.com
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Joined: Apr 2002
Posts: 73
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i was about to do mine the other day , ,but i checked it and it was at .935 , so this makes me wonder what my WOT is..since i have the same car as you "nick" did the gutting of pre cats and taking off the RES help anythnig ?
99 Contour Sport 24 valve
Gutted Cat,Resignator Removed
5% Tinted Windows,
Side strips removed
C10N@yahoo.com
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Joined: Jul 2000
Posts: 1,461
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Your voltmeter is probably inaccurate. The voltage reference for the TPS is supposed to be 5V, so no voltage higher than that should come out out of it. Either that or the voltage reference (on one of the other two wires) is wrong, but that's highly unlikely.
There was much discussion on this mod on Corral.net a while ago, and someone said that it doesn't do very much because the PCM considers the lowest voltage it gets from the TPS to be the fully-closed throttle position. Nobody has ever been able to explain why .98V happens to be the "correct" reading, either...
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Joined: Sep 2000
Posts: 407
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OP
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Joined: Sep 2000
Posts: 407 |
Originally posted by 99blacksesport:
I have a question. I tried this mod today (BTW, when you poke the wires with the safty pins, dont let them touch when the ignition is on, it fried mine) When I turn the TPS clockwise, the voltage decreses, am I doing something wrong?? When i took my base numbers, i got .89v at idle, and 4.79 at WOT. After I started playing around with it, like I said before, I found that moving it clockwise decresed the voltage. I drilled the brass fittings. I reinstalled it, but this time I tried moving it counter-clockwise, and tuned it into .94 volts as a starting point. I then tightened it down, double checked for .94 volts, but this time at WOT I got 5.4 volts, which was said to be way too high. I then turned it back to .89 at idle, then check WOT and still got 5.4v. I played around with it, but was unable to get WOT to come back down to 4.79 before I fired the TPS. Can anyone tell me what I am doing wrong??? Thanks... -Nick What were you turning? The part that has the screws on it or the part inside the TB. If it's the latter then it's counterclockwise, the former, clockwise. I never checked my WOT voltage so all I can say here is flick the throttle cable a few times to ensure it returns back to normal. On a side note, I had the voltage up to over .96 and felt the car wasn't quite right ... moved it back to .94X last night and I think I may move it back to the .92 - .935 range. So far, the .935 has felt the best for me.
Black 98.5 SVT w/ KKM intake, 73mm MAF, ASP pulley, Optimized stock Y-Pipe, 24mm hollow rear sway bar, Magnaflow resonator, Magnaflow mufflers, Roush springs, KYB struts
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Joined: Jan 2001
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I was taking the TPS unit and pushing down on the right side, where the wiring harness plugs into it.
"My family hauler can kick your family hauler's @SS!"
~~~~1999 Contour SE Sport~~~~
-KKM True Rev
-Custom cat back Flowmaster exhaust
-All Cat's fixed.
-SHO Shop Off-Road Y-pipe
-Many other Mod's done...
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Joined: Sep 2000
Posts: 407
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Posts: 407 |
 That's where you should be turning it. I guess as long as your voltage is going up, push it whatever way it needs to go... maybe the sensor is different on your car??
Black 98.5 SVT w/ KKM intake, 73mm MAF, ASP pulley, Optimized stock Y-Pipe, 24mm hollow rear sway bar, Magnaflow resonator, Magnaflow mufflers, Roush springs, KYB struts
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Joined: Jun 2001
Posts: 3,567
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Originally posted by Bradness:
Personally, I don't like using the "piercing" method. It allows corrosion where the insulation has been pierced-bad news where road salt is used in winter. simple fix for that is to solvent clean the wires in the aera of the pierce, then place a dab of RTV over he hole in the wire, and it will be as good as new. Another method is to use the same safety pins, cut the point off the pin with a pair of wire cutters, and use the cut end of the pin to back probe the connector, or stick the pin into the back of the connector through the same hole the wire enters through, this way you can still get the connection you need wothout piercing the wire insulation.
"careful man, there's a beverage here."
e-mail: boseraq@hotmail.com
aol IM: madhat1412
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Joined: Jun 2000
Posts: 3,248
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So what is the theory behind this..advance spark??
1999 Amazon Green SVT Contour (#554/2760)
Stock SVT Duratec V6 with:
Intake- K&N filter/75mm MAF meter
Exhaust- MSDS Y-pipe/Bassani catback
Durability-Ford "dual mode" damper, Mobil 1/K&N oil filter
179.2 FWHP at 6900 RPM
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Joined: Mar 2002
Posts: 256
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Don't worry about your wires! They are fine, they won't get hurt by piercing the housing... the second you pull the wire out, it closes up anyway (don't forget that you are piercing rubber, it stretches out of the way then shrinks back). You don't need to dab RTV on it because once the wire is out, other than a little dinky dot on the wire, you won't be able to see where you even touched it.
You guys... this is a very simple process... don't make it complicated, and don't be afraid of it, you aren't ruining anything and you can put it all back to normal with out a sole ever knowing anyway! There is nothing bad about this mod.
As far as what the mod does, read this post begining to end, and then (I HATE saying this) do a search, because there was about a 80 reply post that I did a while back and I explain how it all works in that post as well. Check it out.
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Joined: Mar 2002
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You guys... don't worry about what the voltage is at WOT... you are not trying to adjust that... the voltage up there will change proportionaly to that of your closed throttle. That is what you are changing. As far as your readings... TPS sensors quite often get gummed up inside and the voltage is thrown off... I can't remember what the highest voltage is, but if I remember correctly, it was over 5. In any case, not to worry... don't worry about WOT voltage... it makes no difference... that's like trying to set your fuel pressure with the vacum line attached to the regulator!
The reason that you can't go above .98 is because at 1V, it goes into different fuel tables and timing curves... You could set it to .99 if you wanted, but you are running a risk... because you will notice as you are reading voltage... when you depress the throttle, then let it go back to closed throttle... it doesn't always go back to the same exact place... all you are doing is getting it as close as you can to that point within a safety zone so you don't confuse the hell out of your PCM.
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