New mk3 trying to learn a bit

El Supracabras · 08-05-2011, 12:36 PM

One thing at a time. First figure out why the car is dying. Have you run the diagnostic check for codes yet? Did you find and fix the boost leak?

Meekmeek · 08-05-2011, 12:39 PM

I fixed the boost leak. And it was only throwing an o2 sensor with diagnostics.

El Supracabras · 08-05-2011, 01:08 PM

Well, there ya go. O2 sensor readings are only used in closed loop (when its warmed up). Does it even have an oxygen sensor? Is it hooked up?

Meekmeek · 08-05-2011, 02:20 PM

How does the o2 sensor work? I just tried googling it and I foud a lot but nothing really eccplains it.

Meekmeek · 08-05-2011, 02:39 PM

I was just looking and I couldn't find my sensor. I don't think it has one. But I did find my oil leak on my turbo, and that there's a plate missing on my dowpipe that goes to my cat.

El Supracabras · 08-05-2011, 02:52 PM

That's your wastegate, you can bolt a turndown pipe there if you can fit one.
That oil leak is not good, spray it down with some brake parts cleaner to clean it up. Next time you run the engine, check to see where the "fresh" oil is coming out of.
The lack of an o2 sensor might be whats causing it to stall. Is it using the stock computer? It should be mounted above the glovebox under the dash.

Meekmeek · 08-05-2011, 03:13 PM

I found it. Its broke and one wire wasn't connected on it. I connected them and I'm waiting on it warm up. The check engine is is out but when I was letting it warm it came back on. I think it is a stock Ecu. It is fresh oil coming out of it but it only comes out when I give it gas.

Meekmeek · 08-05-2011, 03:20 PM

Any ideas on the turbo fix ir is it just done?

cre · 08-05-2011, 08:46 PM

In your last photos:

1) Fuel resistor pack relay connector. This is normally run to a relay which switches the fuel pump power to a resistor pack to help lower fuel pressure at low loads. It's commonly deleted with aftermarket pumps although this requisite has been largely disproved.

2) and 4) A pre89 ECU hacked into an '89+ chassis?

3) The HAC sensor connector. The HAC sensor is used by the ECU to account for changes in altitude. If you live near sea-level and don't drive in different elevations you may bypass it with a couple resistors, otherwise pick one up (used or new). In '89+ ECUs it is internal. See the diagram linked to below for the HAC bypass resistor values (Just a box on the side):
http://www.fadingworld.com/CRE/Autom...087-88-r21.jpg

That is one terrifying wiring job and the mods appear to be half-assed at best... I wouldn't have bought it for anything more than parts.

08-05-2011, 12:39 PM	#2
Meekmeek Stock Join Date: Jul 2011 Location: Augusta, SC Posts: 20	I fixed the boost leak. And it was only throwing an o2 sensor with diagnostics. __________________ Mk3 7M newbie.

08-05-2011, 02:20 PM	#4
Meekmeek Stock Join Date: Jul 2011 Location: Augusta, SC Posts: 20	How does the o2 sensor work? I just tried googling it and I foud a lot but nothing really eccplains it. __________________ Mk3 7M newbie.

08-05-2011, 02:39 PM	#5
Meekmeek Stock Join Date: Jul 2011 Location: Augusta, SC Posts: 20	I was just looking and I couldn't find my sensor. I don't think it has one. But I did find my oil leak on my turbo, and that there's a plate missing on my dowpipe that goes to my cat. Attached Thumbnails __________________ Mk3 7M newbie.

08-05-2011, 03:13 PM	#7
Meekmeek Stock Join Date: Jul 2011 Location: Augusta, SC Posts: 20	I found it. Its broke and one wire wasn't connected on it. I connected them and I'm waiting on it warm up. The check engine is is out but when I was letting it warm it came back on. I think it is a stock Ecu. It is fresh oil coming out of it but it only comes out when I give it gas. Attached Thumbnails __________________ Mk3 7M newbie.

08-05-2011, 03:20 PM	#8
Meekmeek Stock Join Date: Jul 2011 Location: Augusta, SC Posts: 20	Any ideas on the turbo fix ir is it just done? __________________ Mk3 7M newbie.

08-05-2011, 12:36 PM	#1
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	One thing at a time. First figure out why the car is dying. Have you run the diagnostic check for codes yet? Did you find and fix the boost leak?

08-05-2011, 01:08 PM	#3
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	Well, there ya go. O2 sensor readings are only used in closed loop (when its warmed up). Does it even have an oxygen sensor? Is it hooked up?

08-05-2011, 02:52 PM	#6
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	That's your wastegate, you can bolt a turndown pipe there if you can fit one. That oil leak is not good, spray it down with some brake parts cleaner to clean it up. Next time you run the engine, check to see where the "fresh" oil is coming out of. The lack of an o2 sensor might be whats causing it to stall. Is it using the stock computer? It should be mounted above the glovebox under the dash.

08-05-2011, 08:46 PM	#9
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	In your last photos: 1) Fuel resistor pack relay connector. This is normally run to a relay which switches the fuel pump power to a resistor pack to help lower fuel pressure at low loads. It's commonly deleted with aftermarket pumps although this requisite has been largely disproved. 2) and 4) A pre89 ECU hacked into an '89+ chassis? 3) The HAC sensor connector. The HAC sensor is used by the ECU to account for changes in altitude. If you live near sea-level and don't drive in different elevations you may bypass it with a couple resistors, otherwise pick one up (used or new). In '89+ ECUs it is internal. See the diagram linked to below for the HAC bypass resistor values (Just a box on the side): http://www.fadingworld.com/CRE/Autom...087-88-r21.jpg That is one terrifying wiring job and the mods appear to be half-assed at best... I wouldn't have bought it for anything more than parts. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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