[Diy_efi] RE: Mopar tuning

[Clair Davis]

The Mopar TPS units center the same way, IIRC, with the same type of
shoulder as the GM's, etc.  That's a good idea on pressing out the bushings,
I was dreading how long it would take to "waller out" the bushing with a
dremel.  Alternatively, you could press out the bushing and drill it
oversize, press back in to provide some adjustment, too.

Clair (still not quite ready to fire the old girl up...)
FTWTX

PS, I need to talk Cadillac with you some time...


----- Original Message ----- 
From: "Cad Company Support" <support at cad500parts.com>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, September 20, 2006 3:21 PM
Subject: [Diy_efi] RE: Mopar tuning


> BMW TPS units are not adjustable, either, but when necessary, I drove the
> brass bushing out of the hole, and used washers behind the screw heads, to
> allow adjustment. If more adjustment is necessary, I suppose you could
> probably drill the holes bigger or slot them like a GM using a Dremel.
Just
> be careful not to over tighten, as there is nothing left to prevent you
from
> crushing the plastic sensor housing. Of course, on BMWs, like GMs, there
is
> a shoulder that centers the sensor around the shaft in the middle of the
> sensor. I don't know if Mopar sensors have anything besides the bolts to
> center them, and if it isn't centered properly, it could potentially cause
> binding, resulting in sensor failure or maybe even a stuck throttle.
>
> Chris
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
> Behalf Of Clair Davis
> Sent: Friday, September 15, 2006 7:48 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] Mopar tuning?
>
> The main issues I had (and which may not apply to your project) were the
> following:
>
> IAC wiring - had to sort out hi/lo coils and the Mopar wiring diagrams
> don't list them that way.  +/- for each coil is easy enough, but I
> rolled the dice on which was hi/lo.  Shouldn't be an issue, but it's a
> matter of swapping 4 wires around to fix it if I need to.  This ASSumes
> a stepper motor IAC, not the Ford-type thing.  Since you're talking
> Jeep, which was and still sort of continues to be its own thing,
> ANYTHING could have been used.  Lots of AMC heritage clinging to that
> division, and all the EFI control units for the trucks were developed by
> the AMC/Jeep engineers.  Vastly different architecture than the pass car
> controllers.
>
> TPS function & wiring - My original GM TPS wouldn't bolt up to the
> aftermarket Mopar throttle body (go fig), and the TPS I needed was
> "handed" opposite from the OEM Magnum TPS.  That is, the throttle shaft
> twisted CW rather than CCW, for example.  Found an earlier pre-Magnum TBI
> TPS that
> did the job, and even shared the GM connector.  Had to swap a couple
> wires, though, and many of the Mopar TPS's aren't adjustable.  I'm
> thinking the Mopar PCM reads the initial resistance and sets that as the
> baseline.  I hope that's not a problem with my 7730.
>
> MAP wiring - just a matter of making sure the wires in the connector are
> correct for the sensor, and that the plug fits.  Another non-problem.
>
> Clair
>
>
>
>
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