Egr headers help asap

[ShawnTexan]

OK been trying to get my headers on and can't get the dumb egr line to thread up. What happens if I don't connect it will u get codes will egr act up. Please help thanks.

[centralcoaster33]

I'd think you line it up before tightening the studs and before putting on the rest of the exhaust. You can loosen other end of the EGR pipe as well. Not sure about codes, you don't post year and Z32 is obd1 or obd2. I don't recommend EGR delete for street cars.

[ShawnTexan]

94 obd1 been trying to line is up for about 4 hours total all different types angles yes headers are loose threads don't seem to want to catch been reading up on egr delete might do that rather attach it but if I give up want options.

[elecfus]

the EGR is a way of virtually reducing displacement to make the engine more efficient at low revs. it wont idle properly. exhaust gases are mostly inert so when you mix inert gas with fuel and oxygen, theres less reactive gasses to go boom. with stock maps it will just lean out the engine making it overheat while idling and stall due to the poor stoichiometry.

[ShawnTexan]

Elecfus thanks for information. I hope your wrong I gave up and finished headers without plugging in the egr pipe. Haven't finished the rest of the installation so will see if what u say is true.

[nissanfreak12]

If you block off the EGR properly, the car will run, idle, and do everything like normal except the "saving the planet" stuff. Now on our cars, the EGR is more than clogged and not functioning properly. If you do not have an Cali car or a 96(obdII), there will be no check engine light.

All ports have to be blocked off in order for the car to run properly. Make sure you do the block off plates on the Plenum, otherwise you will have a vac leak.

I have done this on all my Z cars that I have owned. All ran great, never overheated, I have passed emission(mainly because they cannot see the EGR valve anyways), and still have all the performance I had before on a stock tune. This has been done multiple times by many many members. The EGR if failed will cause a vac leaked, which will then cause the car to idle odd and die.

[ShawnTexan]

OK so basically I need to do the egr delete. Assuming my egr is good can I just change the egr vac lines so it's not enabled and leave the rest in place without issues. Not in a mood to remove plenum and such plus I would have to drop trany to get to egr.

[nissanfreak12]

Yes, you can just remove the vac line to the EGR, but sometimes that still will create a leak, depends if you have a good EGR valve. You can lower the EGR pipes from the plenum and block them off, but it is a pain with how far they go into the plenum and how tough the pipe is to bend. If you can get a saw to the pipes you can cut them and do it that way.

The EGR doesn't have to be removed, It can just sit there until your ready. After you remove the parts from the plenum, nothing else go to it except the vac line.

[ShawnTexan]

OK thanks fired it up today it sounds great I need to look up the egr mod and find the vac lines now.

[elecfus]

z32 passes smog tests easy because it was allowed to pump fresh air into the exhaust and burn waste fuel in the cat. so for a vehicle of its displacement and age it seems very clean when they do the test with all that fresh air that gets pumped to fool the system. pre-VW scandals, this is how car manufacturers bypassed emissions nonsense. the EGR delete isnt an issue if you raise the idle and you'll notice the engine temperature creeping if you ever get stuck in slow moving traffic. its not a problem over about 3000rpm because the EGR doesnt operate above that.

the EGR system is just an inert gas injection system. theres loads of resources to explain how it reduces combustion temperatures. it's just that exhaust gas scavenging provides a constant source but in higher end and experimental designs they use argon gas. it slows the burn and in so doing, reduces the pressure and peak temperature inside the cylinder. this is why the time between when the intake valves close and exhaust valves open is greater, because it takes longer to burn the fuel. im just saying that it does something useful, it's not just an evil government conspiracy to gimp your car to make the bicyclists happy.
https://www.researchgate.net/publicatio ... ke_Mixture
http://papers.sae.org/2000-01-0657/
http://www.sciencedirect.com/science/ar ... 6812000907

[nissanfreak12]

z32 passes smog tests easy because it was allowed to pump fresh air into the exhaust and burn waste fuel in the cat. so for a vehicle of its displacement and age it seems very clean when they do the test with all that fresh air that gets pumped to fool the system. pre-VW scandals, this is how car manufacturers bypassed emissions nonsense. the EGR delete isnt an issue if you raise the idle and you'll notice the engine temperature creeping if you ever get stuck in slow moving traffic. its not a problem over about 3000rpm because the EGR doesnt operate above that.

the EGR system is just an inert gas injection system. theres loads of resources to explain how it reduces combustion temperatures. it's just that exhaust gas scavenging provides a constant source but in higher end and experimental designs they use argon gas. it slows the burn and in so doing, reduces the pressure and peak temperature inside the cylinder. this is why the time between when the intake valves close and exhaust valves open is greater, because it takes longer to burn the fuel. im just saying that it does something useful, it's not just an evil government conspiracy to gimp your car to make the bicyclists happy.
https://www.researchgate.net/publicatio ... ke_Mixture
http://papers.sae.org/2000-01-0657/
http://www.sciencedirect.com/science/ar ... 6812000907

I am not arguing with you 0r how the EGR works work, but real world experience is you do not have to raise the idle nor does it raise the engine temps noticeable enough to cause concerns. I personally had this on on my my 400 whp 300 and currently on my NA. Both had no issues idling at 650 rpms and even in slow creeping traffic in Phoenix in the middle of the summer and AC on had zero issues of heating up. This has been done with stock and highly modified Z's. The OP asked if it can be done, and yes it can with no effect.

[ShawnTexan]

Thanks for all the info guy what vac line do I need to mod can I just disconnect it from the egr and cap it. 9r do I need to trick it more.

[centralcoaster33]

I'm pretty sure you'll be capping the line that goes into the BPT valve from the EGR solenoid. If this comes from a T in a vacuum line, remove the line with T and just bypass the T between the other two hose locations with a single hose.

[ShawnTexan]

update, so i have a CA ecu on my car and i am getting check engine light for the EGR, im waiting on some resistors to show up in the mail so i can trick the computer i will update u once i get those. car is still running great and smooth.

[ScottTravelzeworld]

Anything you need to know about deletes google Robos Twin turbo info. His site is twin turbo . info This guy did an awesome write up with photos.
Side note: I never put resisters in mine. Disconnect the actuator and the computer uses "Fixed" Values for operation.