Do Aussie 4.5L 1FZ-FE have EGR systems?

Hi my 95 model 4.5 petrol 80 series dosen't have EGR,as probably with all other Petrol Landcrusiers.
EGR is a diesel engine thing.

Rob

All modern vehicles in australia will have ERG fitted regardless of petrol or diesel.

refer to link below

http://www.autozone.com/repairguides/Toyota-Pick-ups-Land-Cruiser-4Runner-1989-1996/EMISSION-CONTROLS/Exhaust-Gas-Recirculation-EGR-System/_/P-0900c15280060d36

Dean, you have linked to an American website, which lists American 1FZ-FE engines.
One has to be careful of different engine and emission specifications between countries.
The word "pick-ups" should have alerted you to what you were looking at, as well as the "About Autozone" website link ...

http://www.autozoneinc.com/about_us/index.html

However, the Australian-spec 1FZ-FE engines do also have EGR, as it appears that this was standard fit, worldwide.

The 1FZ-FE first appeared in 1993 in the FZJ80. This was an OBD-I (on-board engine diagnosis) vehicle/engine.
The OBD-1 systems did not use a diagnostic scanner, you got DTC's (Diagnostic Trouble Codes) via lights or dash readouts, and by pressing various buttons in the correct sequence.

In 1995, the FZJ80 with the 1FZ-FE was changed to the OBD-II spec system. The engine design changes were minor, to accommodate the OBD-II system, mostly wiring and OBD connector changes, and standardisation to enable the use of diagnostic scanners.

The 1FZ-FE engine was upgraded to distributorless ignition (direct coil ignition or TDI - Toyota Direct Ignition) in 1998, and the engine was dropped from the Australian Toyota model line in 2004.

Here is a link to the Toyota release notes on the new 1FZ-FE engine, as outlined in an SAE technical paper in March 1993 (the engine was released in Nov 1992).

https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwjl_L21j8_UAhUDW5QKHRprA1cQFgg2MAM&url=https%3A%2F%2Fforum.ih8mud.com%2Fattachments%2F930876-pdf.1445272%2F&usg=AFQjCNHOMeEu1lJpqH2gac1A6Q4xuIzSPg

EGR is simply a method of reducing emissions (specifically, Nitrous Oxides) to lower levels, to meet specific emission standards or laws.
EGR reduces high combustion temperatures that would normally create high levels of nitrous oxides.

EGR is not used on every engine produced since the 1970's. It is used as a method of meeting emissions laws when the engine cannot meet the emissions standards, by other engine design features or methods.

From the 1970's to the late 1980's, EGR was commonly used on petrol engines. Then it was dropped on many petrol engines in the 1990's, as major engine design improvements did away with the need to fit EGR.

Since 2010, EGR has again been commonly fitted to petrol engines as a method of improving fuel economy.
The fitting of EGR to the latest downsized, direct-injected petrol engines can reduce pumping losses, improve combustion efficiency, improve knock tolerance, and lessen the need for fuel enrichment.

A number of engines can meet emission levels standards without EGR - it all depends on the specific engine design.
Modern engine designs with advanced, variable timing and valve systems, as well as multiple valve heads, and advanced combustion chamber and piston and ring design, means that engine designers can have other methods of meeting emission levels, without fitting EGR.
However, finding engines that do not have EGR in recent years is becoming rarer.

EGR is commonly fitted to diesel engines, because diesels major exhaust pollutant is nitrous oxides, and there is very little choice (since about year 2000) for diesel engine manufacturers to lower nitrous oxide emissions, without fitting EGR.

However, a couple of diesel manufacturers have managed to avoid EGR. I seem to recall that Lombardini is one.
These manufacturers often choose a specific engine design, or use exhaust gas treatment using the likes of urea (AdBlue).
This emission control method is called SCR (Selective Catalytic Reduction) and is used by most heavy vehicle engine manufacturers producing diesel engines after 2010.
SCR is also used in some diesel car models produced by Mercedes, BMW and VW.

Thanks for the responses and photos, gentleman. It was confusing for a while there but we got to the answer in the end :)

Cheers :thumbsup: