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Old 11-23-2011, 03:50 PM   #1
yoshi123
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Thanks, will post up my findings here. I'm leaning towards the ignitor or a bad ECU, outside chance coil packs/MAF.
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Old 12-02-2011, 10:47 AM   #2
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Originally Posted by yoshi123 View Post
Thanks, will post up my findings here. I'm leaning towards the ignitor or a bad ECU, outside chance coil packs/MAF.
Any updates?
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Old 12-02-2011, 04:34 PM   #3
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I haven't had my friend over with the oscilliscope to do the testing.

However, I did this

- started car, let idle. Car cut out between 20-30minutes. Felt the ignitor, it was hot/warm.

- let car cool down, prob 30 mins. Started car, cut out immediately. Felt ignitor, it was cold.

This is making me consider it isn't the ignitor.

2nd thing I did was pull the TOMS ECU. I found brown liquid stuff on one connector of the 5 connectors of the TOMS ECU. I thought this would be the problem. So I clean up the connector, and put in a STOCK ECU inside this time. Car still cut out. Damn.

I took apart the TOMS ecu, didn't see any components leaking. Odd.

Spoke to my mechanic, said check sparks, HT leads, ignitor, coils. He then said I'd have to check the fuel pump after this...

I will hopefully check by next week, although if we presume something is heating up and failing, then it tend would rule out the ignitor as this was stone cold and the car still failed to start. The car then started fine the following morning. It could still be the ignitor of course but it's an outside chance. And I think I can rule out the ECU also.
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Old 12-03-2011, 04:06 AM   #4
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Quote:
Originally Posted by yoshi123 View Post
I haven't had my friend over with the oscilliscope to do the testing.

However, I did this

- started car, let idle. Car cut out between 20-30minutes. Felt the ignitor, it was hot/warm.

- let car cool down, prob 30 mins. Started car, cut out immediately. Felt ignitor, it was cold.

This is making me consider it isn't the ignitor.

2nd thing I did was pull the TOMS ECU. I found brown liquid stuff on one connector of the 5 connectors of the TOMS ECU. I thought this would be the problem. So I clean up the connector, and put in a STOCK ECU inside this time. Car still cut out. Damn.

I took apart the TOMS ecu, didn't see any components leaking. Odd.

Spoke to my mechanic, said check sparks, HT leads, ignitor, coils. He then said I'd have to check the fuel pump after this...

I will hopefully check by next week, although if we presume something is heating up and failing, then it tend would rule out the ignitor as this was stone cold and the car still failed to start. The car then started fine the following morning. It could still be the ignitor of course but it's an outside chance. And I think I can rule out the ECU also.
Have you ruled out the Air temp sensor?
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Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 12-04-2011, 09:10 PM   #5
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- where is this located?

- how do I test it?
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Old 12-05-2011, 02:21 AM   #6
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Quote:
Originally Posted by yoshi123 View Post
- where is this located?

- how do I test it?
On the US-spec Mkiv TT, the intake air temp sensor is part of the MAF, and is tested by checking the voltage between THA and E2 of the ECM connector...as well as the resistance between pins 3 and 4 on the MAF. All of this is in your TSRM.
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Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 12-11-2011, 09:18 AM   #7
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Thanks I'll check that too. Haven't done anything with the car, I need to allocate a day for testing and get my friend over.
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