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sicminds
GenIII
11/07/2002
11:27:40
|
 Subject: new trick? TPS adjuster?
IP: Logged
Message:
I was just daydreaming at work today
when I came up with an idea, one
that could work and one the couldn't.
A couple months back when i modded my
TPS sensor, I put it all the way up
to read 2.1 instead on the .76 volts.
When i tested it, it made my truck
start off the line fast as hell!
threw me back in the seat like there was 2
more cylinders under the hood.
The down side to that is....
It ran throught the gears real fast(automatic)
and once it got to OD at like 55 floored, the check engine light came on.
My question is....
Is it possible to make a tps adjuster that will
allow us to get that get up and go power and then automatical adjust it so it wont trip the light?
I am going to school for Computer electronics, And i build circuits all day, So i was thinking up a circuit build for it already....
Just wanting to know if its mechanicaly possible.
now you know thats..................
sic
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Jon
Dodge Dakota
JOIN HERE
11/07/2002
13:07:19
|  RE: new trick? TPS adjuster?
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Message:
I wouldn't recommend it, your probably making the truck run rich, which isn't good for the cat, your also changing ignition timing. It might not be too bad to do it once and a while when your racing but i think on these trucks the TPS signal also controls the torque convertor clutch lockup. I have seen out of spec TPS's destroy automatic transmissions (after many miles of driving).
But if you had no cats, high octane fuel, and a manual tranny????
Of course when you saw the check engine light come on it probably set a code for TPS voltage out of range which throws the computer into open loop.
-Jon
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sicminds
GenIII
11/08/2002
17:08:43
| RE: new trick? TPS adjuster?
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Message:
Does any one know where i can get some further information on the TPS sensor and other sensors that controll the timing and or fuel.
thanks
now you know thats..................
sic
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Jon
Dodge Dakota
JOIN HERE
11/08/2002
18:15:14
| RE: new trick? TPS adjuster?
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Message:
I don't know of any websites but my old college textbook is "Advanced Engine Performance Diagnosis" By James D. Halderman. Tells you everything there is to know about sensors, trouble codes, diagnostics, ignition systems, ocilloscopes, exhaust gas analysis, drivability, computers, etc. The second edition covers up to 2002 vehicles.
-Jon
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sicminds
GenIII
11/09/2002
00:40:39
| RE: new trick? TPS adjuster?
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Message:
thanks Jon, i will look into it.
But for the time bein does any one
else know any sites?
now you know thats..................
sic
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IntenseDak39
*GenIII*
11/09/2002
08:15:24
| RE: new trick? TPS adjuster?
IP: Logged
Message:
There is something like that for late model GM motors... dont know how far they go though..
i just found it in the summit racing catalog...
Casper's Electronics Inc.
CEI-102017.....1991-99 GM $89.95
CEI-102014.....1986-93 Ford $89.95
Designed for computer controlled vehicles, this throttle response calibrator will eliminate annoying hesitation when you mash down your throttle. It simply plugs into your TPS and reprograms your engine computer to advance ignition timing and increase a/f delivery when your throttle is above 70% open.
not really an adjuster but sounds promising... i am thinking about buying one for my alero.. You should see if they have a website and offer any thing for dodge.
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sicminds
GenIII
11/09/2002
18:21:13
| RE: new trick? TPS adjuster?
IP: Logged
Message:
Yeah i was thinking along the lines of just the quick off the line power threw 1st and 2nd and maybe 3rd. It would be somthing that you would plug into the tps or splice the wires.
It wouldn't be really an adjuster like the IAT adjuster. It would just be one that adjust the tps voltage determining on the speed/rpms.
Just somthing that could just be a pipe-dream now but i have been talking with my instructors at school and they are thinking of ways to build the circuit itself.
I just need more information on the mechanical side of the spectrum.
Bernd probaly knows how the tps works, but he probaly is still busy with the shop. Either that or he is curnetly building the same.
The world may never know.......
now you know thats..................
sic
|
sicminds
GenIII
11/09/2002
18:21:43
| RE: new trick? TPS adjuster?
IP: Logged
Message:
Yeah i was thinking along the lines of just the quick off the line power threw 1st and 2nd and maybe 3rd. It would be somthing that you would plug into the tps or splice the wires.
It wouldn't be really an adjuster like the IAT adjuster. It would just be one that adjust the tps voltage determining on the speed/rpms.
Just somthing that could just be a pipe-dream now but i have been talking with my instructors at school and they are thinking of ways to build the circuit itself.
I just need more information on the mechanical side of the spectrum.
Bernd probaly knows how the tps works, but he probaly is still busy with the shop. Either that or he is curnetly building the same.
The world may never know.......
now you know thats..................
sic
|
Jon
Dodge Dakota
JOIN HERE
11/10/2002
12:27:21
| RE: new trick? TPS adjuster?
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Message:
I was doing more thinking about the TPS. The ECU looks at the TPS and uses that signal to predict how much pressure it is going to see at the MAP sensor, and uses that info to and more fuel and adjust timing accordingly. If you made a circuit that would adjust both the MAP and TPS signals at the same time you might beable to trick the computer without it finding out. Heres another idea, instead of turning it up to 2.1 volts keep it down around 1 to 1.5 volts at idle. Then have the circuit bring the sensor back into spec as you accelerate. That way your running rich right of the line which gives you power, but then when your at wide open throttle the sensors are reading what they should and that may solve the transmission problem. You obviously wouldn't want to drive around like this all the time, but you could have a switch up on the dash to turn it on.
Just some ideas, use at your own risk.
-Jon
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sicminds
GenIII
11/10/2002
12:57:36
| RE: new trick? TPS adjuster?
IP: Logged
Message:
Thats a good idea john about controlling both sensors. I dont think it trips the light till it shifts into O/D which would be 4th gear in my tranny. And yes it would be wired into a swith so you could turn it on and off.
The question is, would i even be able to up the voltage on the TPS sensor with out turning it, like the mod listed on speedtweaks.net?
Could i do that with out having to drill out the brass inserts? Increase it just threw the wires kinda like the IAT adjuster?
I still will need some more information on the differnt voltages of the TPS and The Map sensor through out the RPM band out when it is above a certain WOT percent. Kinda like the one the offer for the GM engines at summitracing.com
Casper's Electronics Inc.
CEI-102017.....1991-99 GM $89.95
CEI-102014.....1986-93 Ford $89.95
Still an idea, but if we could get this to work it would be a money maker for sure.
now you know thats..................
sic
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DakotaDan
*GenIII*
11/10/2002
13:00:01
|  RE: new trick? TPS adjuster?
IP: Logged
Message:
SpeedTweaks:
Moving the MAP Sensor line to Manifold Vacuum
Some folks have claimed that moving the MAP Sensor signal line (vacuum line) over to Manifold Vacuum generates more HP and TQ. While it "feels" like it, all you're doing is dropping the MAP signal quicker - causing the PCM to think that it's under a load quicker - therefore adding more fuel and retarding the timing slightly quicker (yes...timing is retarded while under a load). In cases where a longer duration camshaft with more overlap (see Poor Idle with Big Cam tip) is present, this does work...but it's not going to substantially increase HP/TQ on stock cam's engines.
Dan
"Can You Hear Me Now"........................................GOOD !!!!!!!!!!!!!!!!!!!!!!!!!
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Jon
Dodge Dakota
JOIN HERE
11/10/2002
14:14:07
| RE: new trick? TPS adjuster?
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Message:
Yeah it can all be done electronically. The sensors just modify the computers 5 volt reference voltage. The TPS is a potentiometer, by turning it you are lowering the resistance, therefore raising the voltage that the computer sees. To increase the voltage we would need a 5 volt power source that we can adjust with other resistors then send that back to the computer, then at a certain rpm (maybe 1500) we could switch the computer back over to the real TPS sensor. Next time i have some spare time at work i'll check out my sensors with an ocilloscope to see what the voltages are at different throttle percentages.
%!$@% now you got me interested in it!
-Jon
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sicminds
GenIII
11/10/2002
16:49:23
| RE: new trick? TPS adjuster?
IP: Logged
Message:
Jon, your interested, i cant stop dreamin about it. :) I will re-search some of the sensors that controll the timing/fuel and the tps/map
Maybe we should talk over email so no one takes advantage of the idea
now you know thats..................
sic
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Dirkota
Dodge Dakota
JOIN HERE
11/10/2002
19:00:57
| RE: new trick? TPS adjuster?
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Message:
To late sicminds! Already applying for patent :-)
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