abeans st185 - Kill 1 Save Another

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Re: abeans st185 - Kill 1 Save Another

Postby abeans » Thu Apr 02, 2020 11:12 pm

93celicaconv wrote:I'm sure this sentence means something to you, but I don't understand what this is trying to say
+b and fp terminals on the diag port. Read Here, that worked for some. viewtopic.php?t=47108

93celicaconv wrote:What do you mean by "prime the key 5-6 times to build up enough fuel pressure"? Do you mean you are activating the starter motor 5-6 times and turning the engine over that many different times? I'm not seeing 5-6 times of anything in the video.[/color]


Nope. Won't be in the video. The fuel line had a rust hole (Shocking.), and cycling the key a few times gave it some fuel pressure.
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Re: abeans st185 - Kill 1 Save Another

Postby 93celicaconv » Thu Apr 02, 2020 11:24 pm

Sorry, had no idea you were saying that in that first note at all.

Also, the fuel pump does not operate when the key is turned on & off - it only turns on when the key is in the start position - and once the engine starts and the ECU picks up sensor input that the engine is on its own, it latches the fuel pump to keep on running. Unless your wiring/circuitry/control was changed from factory on this item.

Good luck on your future work towards getting your project running where you want it to be.
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Re: abeans st185 - Kill 1 Save Another

Postby alltracman78 » Fri Apr 03, 2020 6:30 pm

He's right, the pump doesn't run when the key is turned to the on position unless the engine is running (or the diag pins are jumped).

Have you checked for spark at the coil? Might be good to do that before you tear the dist apart.
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Re: abeans st185 - Kill 1 Save Another

Postby alltracman78 » Fri Apr 03, 2020 7:16 pm

93celicaconv wrote:Unless you have a California emissions version, while the factory ECU "controls" EGR, it does not "monitor" EGR (there is no DTC tripped from a detection something is wrong with it). California emissions setups incorporate an EGR gas temp sensor, and the California emissions ECU will trip if the actual EGR gas temperatures aren't close to the mapping of normal EGR gas temperatures when the EGR is controlling it.

Same goes for the EVAP system, except in this case, the ECU has no part of it's control (just the VSV that you said on yours is broken).


I'm not trying to bust anyones balls here, just correct the facts for future reference. :)

There's no California emissions ECU; all the ECUs monitor EGR temp. The difference is the California emissions cars have an actual EGR temp sensor, the federal emissions cars use a factory installed resistor (in the temp sensor connector) instead.

And the ECU could care less about the EVAP, California or federal. Doesn't control it. Doesn't monitor it.
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Re: abeans st185 - Kill 1 Save Another

Postby 93celicaconv » Fri Apr 03, 2020 7:53 pm

alltracman78 wrote:
93celicaconv wrote:Unless you have a California emissions version, while the factory ECU "controls" EGR, it does not "monitor" EGR (there is no DTC tripped from a detection something is wrong with it). California emissions setups incorporate an EGR gas temp sensor, and the California emissions ECU will trip if the actual EGR gas temperatures aren't close to the mapping of normal EGR gas temperatures when the EGR is controlling it.

Same goes for the EVAP system, except in this case, the ECU has no part of it's control (just the VSV that you said on yours is broken).


I'm not trying to bust anyones balls here, just correct the facts for future reference. :)

There's no California emissions ECU; all the ECUs monitor EGR temp. The difference is the California emissions cars have an actual EGR temp sensor, the federal emissions cars use a factory installed resistor (in the temp sensor connector) instead.

And the ECU could care less about the EVAP, California or federal. Doesn't control it. Doesn't monitor it.

You are correct, alltracman78. I should not have used the words "California emissions" prior to the word ECU - I was so focused on the difference on a California emissions setup, I used the reference once too often. Apologize for that error. It is interesting that the shop manual, on pages FI-44 & 45, reference DTC 71 (EGR System Malfunction) as a code used for California specifications only. I think, since there is only 1 ECU used for all USDM ST185's, that DTC codes exists in all cars, but with a fix resistor reference for all USDM cars less California, that DTC can't be tripped.

I think I was trying to say the same thing about EVAP control - but I can see where it could be interpreted as applying to California cars where ECU's control it. I know the switch is a thermistor-style unit in the water outlet piping off the head, and no wiring involved.

It's best I stay out of this thread - I've caused more concern in this one than any help I've provided.
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Re: abeans st185 - Kill 1 Save Another

Postby abeans » Fri Apr 03, 2020 10:14 pm

You can stay in my thread and argue, I don't care lol. You know you might be right with the starter thing, i might have had to crank it over 5-6 times. I can't remember now.

All i want is the car running. Send a prayer to the toyota gods.
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Re: abeans st185 - Kill 1 Save Another

Postby abeans » Mon Apr 06, 2020 1:45 pm

More not me starting the car updates.

Got this monstrosity apart finally. Had to use the "silo" method. Really unbelievable technique. I took a time lapse video on a go-pro for scientific studies. Not sure what a poor Toyota tech is supposed to do, i would have quit.

My back hurts from muscling it around.

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Re: abeans st185 - Kill 1 Save Another

Postby abeans » Tue Apr 07, 2020 1:40 am

My buddy facetimed me and did some basic troubleshooting.

- Check engine light comes in for a split second with key on, then goes off, black as night anytime else.

- Cranking gives 0 movement on the gauge cluster tach.

I'm going to drop off the parts car distributor to have him throw it on.

Is that check engine light normal behavior? Seems like no way to me.
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Re: abeans st185 - Kill 1 Save Another

Postby abeans » Fri May 22, 2020 9:14 pm

Finally got some hands on the car the last two days. Had a lot of time to think about why it didn't start so i dove in.

Took apart the ecu cover, don't see any obvious issues... Blown caps black burnt marks ect.

Took apart the harness and sure enough i missed a ground near the injector harness. I THOUGHT FOR SURE THIS IS IT.

But, alas still no start. Same issue. :owned: No Injector, no spark, no engine light.


I swapped the fuse box from another car as well and going to swap out the main 100amp fuse even though its good.


Im pretty sure im going to have to test voltages at the ecu next, unless you folk have another idea.
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Re: abeans st185 - Kill 1 Save Another

Postby abeans » Sun May 24, 2020 7:32 pm

And she runs again.

https://youtu.be/nKxus9OT1wE

:D
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Re: abeans st185 - Kill 1 Save Another

Postby underscore » Sun May 24, 2020 9:07 pm

What ended up fixing it?
★ 1991 GTFour RC ~ "Rebel Scum" ★
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
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Re: abeans st185 - Kill 1 Save Another

Postby abeans » Sun May 24, 2020 9:57 pm

I think it was a combination of things but the 7.5 amp fuse in the interior was my last culprit. (Ignition) It gave me the check engine light.

I swapped out so much stuff, I'm not even sure if it pop'd somewhere in-between one of the other things or it was there all along.


Appreciate the help from everyone to get to this point... Now the real fun.
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