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The mkiv Supra Owners Club

1jz got fuel, got spark... no fire


Bizzyfingers

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The feed to the rail should deliver fuel like a geyser, and fill a pint bottle in seconds.

 

The return from the pressure regulator, after the rail should be similarly robust, but with a little less flow due to the pressure drop.

 

Sounds like a pump or filter issue. The correct way to test is after the regulator, there will be a

litres per minute at X PSI figure for the pump somewhere, but from what you say it sounds like

it's nothing like enough flow.

 

You can make your buddy redundant by linking the right terminals in the diagnostic socket so the

fuel pump runs continuously without cranking. B+ and Fp terminals bridged with a paper clip.

Don't use a plastic one like someone who shall remain nameless did, to protect their progeny from ridicule.

Edited by Chris Wilson (see edit history)
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Haha a plastic jumper? Now that IS funny. I thought it should come out at a good psi. When we used the jumper technique (seen elsewhere) I checked the pump on the tank in the boot and there was no whirr, no vibration or sound. My buddy said they can be quiet but not this quiet.

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It could really only be the cam timing unless the crank trigger wheel has come loose. A timing light should show an ignition timing issue, with leads on the front coil to the plugs. (So you have number one lead to clamp off...). Some garages haven't even heard of a timing light these days ;)

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if it was fuel pump it would have gone to start with easy start . sounds like immobilizer .

 

If it was the immobiliser there would be either no fuel or no spark...... or both.... as that's what an immobiliser imobilses.

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It did have an immobiliser, ripped it out, before hand it would cut everything, fuel, electrics, spark... Nothing would work as soon as you turned the key. After ripping out everything fired unto life just no running

 

Check all the connections you broke to take the immobilser out (id guess youve already done this like mate but worth checking again just incase)

 

How strong is the spark? Could it be a faulty ignitor pack? Crank position sensor on the 2j can be quite sensitive id guess its the same on the 1jz, throttle position one is the same

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Hi Chris, I was fascinated re your comment about the engine in question being a "non interference" type, does the same thing apply to the NA, 2jz-ge engines.? I ask this as many owners are always concerned about their timing belt failing and costing them a new engine.

 

In stock form the 1JZ and 2JZ (including NA) are non interference. Does not mean you can pay less attention to the state of the belts. But it does mean if the engine is stock (not got hight lift cams in it) then you don't have to worry about an engine full of metal should the belt go.

 

edit ** Chris beat me to it **

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It did have an immobiliser, ripped it out, before hand it would cut everything, fuel, electrics, spark... Nothing would work as soon as you turned the key. After ripping out everything fired unto life just no running

 

are you sure they conected all the wires . like the other guy said maybe the cam or crank shaft senor isn't working .

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