will this help with the go faster if you ease up on the gas a bit. id like
to fix this weird problem so i can get max power by slamming on the gas.
thanks arnold
----- Original Message -----
From: "Bob Tom" <tigers@bserv.com>
To: <dakota-truck@buffnet.net>
Sent: Saturday, March 03, 2001 6:56 PM
Subject: Re: DML: Re: TPS and MAP control / operation
> Hi, Shane
>
> At 12:37 PM 3/3/01 -0600, you wrote:
> ><snip>
> >Any idea what the the expected extremes for TPS operation are? I'm
getting
> >around 12.5 percent fully closed and 72.x percent fully opened. Hmmm - I
bet
> >thats in my powertrain diagnostics manual - doh! - I hate when I realize
I
> >should
> >be reading the friggen manual (RTFM)... Shane
>
> The F body boys say the voltage bump is made at 70% throttle.
>
> I've also read of another TPS mod specifically done on a Chrysler product.
> The author states that the information has been confirmed by certified
> Chrysler techies
> and extensive testing. I don't know what specific vehicle the author is
> referring to but
> it should serve as a pretty good guide.
>
> For 1995 cars the TPS output voltage to the PCM varies from about 0.5 at
closed
> throttle to 3.7 volts at wide open throttle.
>
> On 1996 and up the TPS output voltage to the PCM ranges from 0.35-1.03 at
> closed
> throttle to a maximum of 3.1-4.0 volts at WOT.
>
> On 1996-2000 cars the voltage should never exceed 4.5 volts.
>
> As the throttle is opened, the voltage should increase slowly.
>
> He has a '95 and performed a TPS mod by drilling the attachment holes a
> little larger
> so that he could turn the TPS from its original position in order to
> increase the closed
> throttle voltage. If the voltage is too high at the 'turn' location,
> you'll have to loosen the
> 2 screws and, with a scanner or DVM, move the TPS to set it at a lower
voltage.
> Chrysler recommends no more than 0.85 volts on the '95 because the PCM,
> when given
> very high TPS voltages, can "seek" and cause extreme rpm fluctuations.
You
> will
> have to make sure that voltage does not go above the 3.7 or 4.5 at WOT for
> your year
> as well. He has been unable to locate the recommended high limit for
> closed throttle
> voltage for the '96-'00s.
>
> My scanner showed on the last run of last year a closed throttle voltage
of
> 0.68
> and WOT voltages of 3.73 and 3.75 (hmmmm, air flow must have been really
> turbulent).
> Another TPS that I have shows sightly different voltage (cannot recall
them at
> the moment). I may try this on this other TPS this summer.
>
> After he did this mod on his '95, his 'modded' readings were 0.93 volts
> (closed)
> and 3.6 volts (WOT), and he experienced no difference in his idle nor any
rpm
> wandering. He said that the difference in throttle response and crispness
were
> noticeable as soon as he pulled his car out of his driveway.
>
> I think that he used a 1/4" bit to drill the holes bigger.
>
> Happy hotrodding :-)
> Bob
>
>
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