ST205WRC troubleshooting

JDM GT Four, ST185RC and ST205.

ST205WRC troubleshooting

Postby LechacZ » Tue Jan 24, 2012 11:01 pm

Hi guys,
I have a 1994 ST205 WRC.
The car developed a weird problem. It cuts fuel really violently at about 8psi.
At least I think it is fuel cut as it feels like fuel cut on overboost.
No Check Engine.
I am puzzled...
I have already replaced the turbo pressure sensor (MAP?) as I had aspare from my now retired ST185 with ST205 swap.
Any suggestions?
I need some help! Please!

Thanks
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Re: ST205WRC troubleshooting

Postby klue » Tue Jan 24, 2012 11:33 pm

Did you check for hidden codes?
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Re: ST205WRC troubleshooting

Postby LechacZ » Thu Jan 26, 2012 4:10 pm

Yes I did look up the codes and I have a 34 and 54.
I don't know how long they have been there but I do have an explonation for both.
When I installed the boost controller I had the over boost a few times and 34 is just that - the check engine is supposed to stay ON when this code is detected and I have no check engine when this is happening.
54 is just the IC collant low...
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Re: ST205WRC troubleshooting

Postby klue » Thu Jan 26, 2012 7:13 pm

fill up the intercooler
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Re: ST205WRC troubleshooting

Postby LechacZ » Thu Jan 26, 2012 8:15 pm

Thanks, it is full... 54 is a stored code
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Re: ST205WRC troubleshooting

Postby klue » Thu Jan 26, 2012 8:29 pm

clear codes and try again. it will do a limp mode for that one
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Re: ST205WRC troubleshooting

Postby LechacZ » Fri Jan 27, 2012 11:44 am

Yeah, cleared codes, tried boosting = fuel cut, no new codes
Man this is frustrating
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Re: ST205WRC troubleshooting

Postby klue » Fri Jan 27, 2012 12:53 pm

No new ones, or the same old ones?
Im going to send you my number text me or something, I got class all day so wont be able to talk until later
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Re: ST205WRC troubleshooting

Postby LechacZ » Fri Jan 27, 2012 1:36 pm

No codes at all now.
I'll text you later in the aft. bussy at work...
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Re: ST205WRC troubleshooting

Postby LechacZ » Sun Jan 29, 2012 3:05 pm

Well, I have replaced the ECU with a spare I know works well and same thing - fuel cut at about 10 psi.
Now the fun will begin... :shrug:
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Re: ST205WRC troubleshooting

Postby underscore » Sun Jan 29, 2012 4:22 pm

bad wiring on the pressure sensor? I'm not sure what kind of signal those send though.

edit: do you have a wideband? are you perhaps knocking?
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Re: ST205WRC troubleshooting

Postby klue » Sun Jan 29, 2012 4:40 pm

map sensor is 5v reference, if it was bad you would have other issues else where
If you can figure it out Les let me know and you can bring it by

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Re: ST205WRC troubleshooting

Postby tubasteve » Sat May 19, 2012 9:23 pm

Bad iGnitor? It won't set a code, similar to doing a 185-205 electronics fuel cut, and keep getting worse, then disappear at times. I had a customer with this issue. Free revving it would fuel (ignition) cut at low rpm and never consistent.

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Re: ST205WRC troubleshooting

Postby GMan » Sat May 19, 2012 9:47 pm

Quick google.

http://www.troublecodes.net/Toyota/
34 Turbocharging
pressure signal

The 34 is "Overboost" Where is the pressure sensor located ?
Bad wire or bad ground somewhere ?

Do you have a Real boost gauge ? ?he stock one is not very accurate.
What boost are you reaching ?

54 Inter-cooler ECM signal.

Could be the IC level sensor or the pump....

Good luck.
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Re: ST205WRC troubleshooting

Postby tubasteve » Sat May 19, 2012 10:06 pm

LechacZ wrote:Yeah, cleared codes, tried boosting = fuel cut, no new codes
Man this is frustrating

Last he had ?


Op fix this yet?
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