exhaust location for EGT gauge probe?

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Mar 11, 2004 | 03:49 PM

Vicore_Wrx

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Car Info: 2003 WRX, blue

A quick

I have an egt probe in my down pipe I am going to get a new down pipe should i move the probe to a better location? I have heard that the header is a better palce. I ask because it is easy to make holes and stupid hard to block them up and make it look good.

Mar 11, 2004 | 03:52 PM

crash n burn

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Did you mean the up-pipe? You really don't need that sensor. Is the pipe you're getting have the fitting for that sensor? If not, then don't worry about it. Just get the resistor to cancel it out and you won't get a cel (check engine light).

Mar 11, 2004 | 09:30 PM

KDamericano

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Car Info: 2003 WRX

I think he's talking about an exhaust gas temperature probe, for an aftermarket guage. If so, the best place for it is in the header, off of cylinder #3 (since that one runs the leanest). It'd be most accurate and helpful there.

Mar 11, 2004 | 10:17 PM

crash n burn

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Quote:

Originally posted by KDamericano
I think he's talking about an exhaust gas temperature probe, for an aftermarket guage. If so, the best place for it is in the header, off of cylinder #3 (since that one runs the leanest). It'd be most accurate and helpful there.

Ahhhh, in that case, then yes. Didn't know that that was what he was talking about....sorry about that.

Mar 12, 2004 | 05:42 AM

Ditty77

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Quote:

Originally posted by KDamericano
If so, the best place for it is in the header, off of cylinder #3 (since that one runs the leanest).

That's where mine is without any problems.

Mar 12, 2004 | 06:21 AM

Nesquik

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Don't mean to get off-topic or hijack the thread but why does cylinder 3 run the leanest? Is it like that on all WRXs?

Mar 12, 2004 | 07:15 AM

crash n burn

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Quote:

Originally posted by Nesquik
Don't mean to get off-topic or hijack the thread but why does cylinder 3 run the leanest? Is it like that on all WRXs?

Has to do with the fuel rail and fuel pressure through the fuel rail. That is why some places recommend you getting an aftermarket one if getting a new turbo and injectors. Running too lean is bad for your engine.

Mar 12, 2004 | 09:31 AM

mmboost

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Quote:

Originally posted by Nesquik
Don't mean to get off-topic or hijack the thread but why does cylinder 3 run the leanest? Is it like that on all WRXs?

its at the furthest end of the rail furthest from the fuel source

Mar 12, 2004 | 10:51 AM

Nesquik

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OK, that makes sense now.
Thanks

Mar 14, 2004 | 06:40 AM

#10

Vicore_Wrx

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thanks for the help

Mar 14, 2004 | 10:08 AM

#11

curbait

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From: kaneohe

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I think the fact that the exhaust runs so close to the #3 cylinder doesn't help either.

Mar 14, 2004 | 01:49 PM

#12

crash n burn

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Quote:

Originally posted by curbait
I think the fact that the exhaust runs so close to the #3 cylinder doesn't help either.

Some older VW's have a problem with something like this. The fuel rail gets really hot and sort of vaporizes the fuel when the car sits, so the car starts to die on you. Pain in the rear...personal experience