Exhaust PIPE query - Toyota Yaris Forums

hassanshakeel · 03-14-2016, 06:23 PM

hello guys,

I'm new at this forum and prolly, new to cars as i lack in the basic knowledge, so please help me out where i go wrong.

okay so my main problem is that my 2000 japan made yaris, in which i recently swapped the old 1sz engine with 2004 model 1NZ, and it has a bit of knock sound, and in extreme cold, the check light comes on. I inquired my mechanic about it, I live in Pakistan and mechanics here mostly do not know a lot and most of their knowledge's source is experience, and not the working rules, etc., told me my fuel had problems, but i use high octane RON 95. I've also changed my fuel injectors, which come with toyota AXIO 1NZ 2012, so they're brand new in condition.
The knock has minimized but doesn't fade away completely when ever i throttle the car hard.

I need advice on what to do?
P.S. my exhaust is the stock one which came with the original 1sz, so does the diameter have sth to do with it?

Waiting for your response

Bluevitz-rs · 03-14-2016, 11:55 PM

You might have too much exhaust restriction with the 1SZ pipe. The stock size of the 1NZ is around 1.75" before the resonator and 1.6" after.

hassanshakeel · 03-15-2016, 04:34 PM

Quote:

Originally Posted by Bluevitz-rs

You might have too much exhaust restriction with the 1SZ pipe. The stock size of the 1NZ is around 1.75" before the resonator and 1.6" after.

Okay, so what size is my current Exhaust pipe? Thanks and i was already planing to change the head back pipe so should i get the aforementioned sizes or could i get some bigger diameters?

hassanshakeel · 03-15-2016, 04:40 PM

And how many O2 sensors my car should have? 2? and could you help me out in finding its OEM manual? diagram etc.?

03-14-2016, 06:23 PM	#1
hassanshakeel Drives: toyota vitz 2000 Join Date: Mar 2016 Location: Pak Posts: 4	Exhaust PIPE query hello guys, I'm new at this forum and prolly, new to cars as i lack in the basic knowledge, so please help me out where i go wrong. okay so my main problem is that my 2000 japan made yaris, in which i recently swapped the old 1sz engine with 2004 model 1NZ, and it has a bit of knock sound, and in extreme cold, the check light comes on. I inquired my mechanic about it, I live in Pakistan and mechanics here mostly do not know a lot and most of their knowledge's source is experience, and not the working rules, etc., told me my fuel had problems, but i use high octane RON 95. I've also changed my fuel injectors, which come with toyota AXIO 1NZ 2012, so they're brand new in condition. The knock has minimized but doesn't fade away completely when ever i throttle the car hard. I need advice on what to do? P.S. my exhaust is the stock one which came with the original 1sz, so does the diameter have sth to do with it? Waiting for your response

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03-14-2016, 11:55 PM	#2
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	You might have too much exhaust restriction with the 1SZ pipe. The stock size of the 1NZ is around 1.75" before the resonator and 1.6" after.

03-15-2016, 04:40 PM	#4
hassanshakeel Drives: toyota vitz 2000 Join Date: Mar 2016 Location: Pak Posts: 4	And how many O2 sensors my car should have? 2? and could you help me out in finding its OEM manual? diagram etc.?