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The mkiv Supra Owners Club

Line-Pressure Feed-Cable


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It is VERY IMPORTANT that this cable functions as designed.

 

I have seen Hybrid installations where this cable has been ignored completely, this results with the pressure being too low to grip the clutches and consequently, burn out.

 

I have also seen installations where this cable is locked open at full pressure, this results with aggressive and damaging jumping when engaging D and lots of wheel-spin off the line.

 

 

It's not rocket science, it's a cable!

 

 

With an N/A auto throttle body it is plug & play, if using a T.T. inlet manifold, use a Soarer 1J-GTE throttle body which has the correct cable ramp and also plug & play.

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Swapping engines, swapping transmissions and/or polishing or painting throttle-bodies entails removal of the cables from the throttle-body which leads to a reassembly mistake that I have come across several times.

 

The favourite mistake is to forget the lower/left ramp and to fit throttle and line-pressure cables onto the right/top two positions.

 

On Supra N/A auto & Soarer 1J-GTE throttle-bodies there are 3 cable ramps.

 

Left - Transmission line-pressure.

Centre - Throttle.

Right - Cruise-control.

 

Reassembly in an incorrect configuration causes several different combinations of malfunctions which could render the car unsafe to drive or/and destroy the transmission.

 

Stock N/A auto throttle body cable ramps. Left, line feed cable - Centre, throttle cable - Right, cruise-control.

(Soarer 1JZ-GTE T.B. locates the cables in same positions.)

 

attachment.php?attachmentid=201726&d=1432560032

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Should your t.b not have a ramp for this cable, alternatively, using nipple and trans mount from original cable & bicycle cable-components it can be connected directly to the accelerator pedal

 

 

Supra acc pedal has a use-able hole 20mm below stock cable mount :)

 

attachment.php?attachmentid=201899&d=1433064545

 

 

 

Hole drilled in bulkhead 20mm below stock-cable & new-cable fitted (18mm would be a better match with throttle cable mount bracket inside) :think:

 

attachment.php?attachmentid=201900&d=1433064545

 

 

 

A little fettering with a Dremmel, this extra cable then cleared the bracket

 

attachment.php?attachmentid=217746&d=1490454068

 

 

 

Using rubber-stopper from GE throttle-cable, a washer & terminal block-connector, job done:thumbs:

 

attachment.php?attachmentid=201901&d=1433066271

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  • 2 years later...

At the pedal-end of the cable-core, run-solder along it, from where the cable-block will cramp onto it, to where you plan to cut it. :think:

 

Do this before you cut it, the cable will then not deform under the screws and your end will never fray. :amen:

 

 

By feel, at zero pedal-depression, set the cable to; "only just not doing anything" and the big squidgy N/A throttle-cable rubber-stopper (or similar), will allow for any slight difference there might be in the two-cables travels at WOT? :thumbs:

 

Confirm that accelerator-pedal has full-travel without putting strain on the line-feed cable, :think: you really don't want the job of finding and re-soldering the nipple back on at the other end. :shrug:

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