ENGINE DIES WHEN KEYS IS RELEASE.

1989 Toyota Supra

Tiny

petermk3

June, 29, 2012 AT 10:04 AM

My eletric fan die, so I did a by pass to my main relay and it kill my engine (i did this by [ass a few time and it didnt die). Though that it was an ignition switch, went to the junk yard and pulled one out and put it into my car but still didnt work. Any answer?

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Tiny

mikederouin88

June, 29, 2012 AT 10:26 AM

Does the key stay forward or bounce back? Is it the same as before u changed it? And by ignition switch do you mean where the key goes or the electrical switch?

Tiny

KHLow2008

June, 29, 2012 AT 3:00 PM

When ignition switch is in run position, are the dash indicators lights showing on dash?

Tiny

petermk3

June, 30, 2012 AT 8:01 AM

Ok mike, when I turn over the key, the engine starts but once I let go of the key it dies. I have a cousin(use to work with the deal for 20 yrs now) that came and look at and try it too. He say that there no power to the switch so that the key switch will stay on.

Tiny

petermk3

June, 30, 2012 AT 8:07 AM

The key does not bounce back or go forward. Yes it where the key goes but the electrical switch is behind where the keys goes. Yup it still the same with the pulled one and the original one.

Tiny

petermk3

June, 30, 2012 AT 8:18 AM

Ok khlow, when the I turn over the key( I have to hold the key for the engine to turn on), none it the light indicator is on. When the ignition is on, all the indicator is on tho.

Tiny

KHLow2008

June, 30, 2012 AT 4:06 PM

Is vehicle with or without turbo? Does applying slight pressure on the accelerator keep the engine running?

Tiny

petermk3

June, 30, 2012 AT 8:53 PM

Ok khw, it a jdm 2jz twin turbo. It not the orginally engine. The old 7m blew out on me when I took it to my buddy house to fix it. Yes I have to put slight pressure on the key to make the engine running (not sure if im in the dame page as you). If the engine on, and I step the peddle for the gas, it just rev, and once key is let it go then it dies.

Tiny

KHLow2008

July, 1, 2012 AT 8:04 AM

Keep your foot on the pedal and release the key, dioes it stall? I need to find out if it is the idle control system that is the cause.

If any repair work was carried out underhood, check the MAF and air hose installation.

Did you check for trouble codes?
Is the MIL indicating?

Tiny

mikederouin88

July, 2, 2012 AT 5:01 AM

Sounds like the electrical switch behind the lock cylinder has failed. I would start there to cut expenses.

Tiny

petermk3

July, 2, 2012 AT 8:10 AM

To khl, even if I step on the gas peddle and let go of the keys it still die. It a customize engine to a ma70 body. Mine does not run maf, it run a map instead. Cuz a japenese spec engine not a us spec.

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