Final question before then engine goes in. about the Egr should I install it or should I leave it out? well benefirts of leaving it out and putting it in thats about it. Also kinda neeb question will it effect gas millage i dont think so right ? thx

 

well 2002 vq35 dont have it.03 and up do i believe jus use the existing one if it comes with it.If not you dont use it basically

 

04+ have EGR.

 

well should i reinstall my 98 EGR in my 03 3.5 engine and well it doesnt have an inlet for it so im also thinking how to do it

 

You'll have to custom drill the intake manifold for the EGR inlet, or retrofit a 00VI manifold onto the 3.5 heads/LIM (00VI has an EGR inlet).

 

I would leave it out.

I had no side affects with the system out.

 

I am guessing you do not have tailpipe emissions testing in IA.

Typically your tailpipe NOx reading will be way over the allowable limit if your egr system is missing or malfunctioning.

 

hey nismo is that your new ride? if so nice.

eng92:not really.if the engine was design not to have one its not malfunctioning now is it?but if it doesnt come with one dont use one.just making more work than neccesary

 

well over here in nyc for a 98 they don't do emission test no more well basically the new test only involves the CEL reading and 2 codes are allowed so i mean I guess I can put it in but some one was telling me that I can T it to some intake inlet source if I just cut the top of the pipe going into the intake manifold. Did anyone attempt it or is it even possible thx

 

you don't need an egr....the engine can work without it so it's fine. i don't think not having an egr will not let you pass emissions becuase it doesn't have an egr in the first place. if you don't want a code just leave the egr sensors plugged in. save yourself some work and just leave the egr out.

 

EGR is a process. It is not a thing.

The 02/03 VQ35DE does have EGR. It does not have a separate EGR system.

EGR is handled by using the VTCs to vary the amount of overlap between the intake and exhaust valves.

 

yes I know that but I believe were jus talking about the external system. Which some have and Internal which other have right?

 

If you have no external system and no VTCs, by what mechanism is the EGR function being carried out?

This of course is only an issue for those who have to pass tailpipe emissions testing. (which I am one)

 

run lean and with a cat and hope for the best

 

Running lean only pushes up EGTs which increases NOx.

Tailpipe testing is all done with the fuel system in closed loop, so you would be fighting the ecu for anything other than stoichiometric.

I have functioning VTCs and always run with a cat, so I am not concerned for myself.

 

oh well could one get by with an exhaust leak?

 

The testing centres are all supposed to check the exhaust for leaks prior to putting the car on the rollers.

 

well theres always that 'other' way

 

Eng: there is no emissions testing in IA.

 

Wouldnt you still get a code? with the whole external system not fuctional wouldnt that make the readings the egr sensors would normally get off and throw off a cel? Or just as long as there plugged in and sending a signal, no cel?

 

You're correct. If the EGT temperature sensor doesn't send a reading during conditions that normally call for EGR a DTC will show up. At least with 96 and up ECU's.

 

Sticking with 04+ will be the best way to avoid emissions problems as stated above. I can't remember which thread I read it in, but with the 3.0 ECU and the 02-03 3.5, the EGR will only partially work since the VTC isn't ... i guess the words are working or moving.

How to solve the problem: Get VTC working on E-Manage Ultimate. It has been debated before, but no one has successfully done it. LOL just don't ask me. Engine internals+electronics > me.

Someone needs to bring the thread back where someone was talking about using the pathfinder 3.0 timing since it has VTC and is directly compatible with out sensors/cams.

 

Oh and a question for me.

I know that 04+ MAXIMA engines have external EGR, but do any 02-03 Altimas or other 3.5 front-wheel have external egr?

Why do I ask? Because older engines are cheaper.