Hi I"m new to this forum. Anyways I just pulled out a CEL code for insufficient EGR flow so i'm thinking that it's time to clean the EGR port. Does anybody know hwo to do this and where the heck this thing is at? how hard is it to do?

 

download the service manual to find the egr

https://acurazine.com/forums/audio-video-electronics-navigation-22/fiberglassed-system-into-my-350z-146807/

how many mile you got on the car? might be still under warranty

 

i have 150,000miles on it so i'm pretty sure its out of warranty.

 

150,00 on the dot? its still under warranty..inless u got a new letter from acura..it exceed to 150,000 for emission

 

oh no it's actually about 152,000 plus a little bit more. is this hard to do yourself?

 

easy. but you goin to have to clean the egr pipe too. but try using seafoam you must have alot of carb in the intake manifold

 

You got a P0401 code also, eh? Seafoam will help a bit, but it won't clear that code. Most likely your EGR pipe is the culprit, not the valve itself. A bit of a pain to get to, though, as it's behind the engine against the firewall.

~Cheers~

 

i would clean it when the emission comes up..cleanign it now it might just come back sometime later

 

I have the same problem on a 97 3.5RL.(Code P0401-low flow) Unfortunately I got the warranty extension notice, but have 168K on her so no dice for a dealer repair. I pulled the EGR, cleaned it and removed the EGR to exhaust port tube and cleaned it. I sprayed about a 1/2 can carb cleaner down the intake, but the light came back on again . I manually moved the EGR while engine was running and she started to choke, so I think the valve is working. Suggestions? Dealer said the warranty work could include wires/tuneup up to pulling the intake manifold and cleaning. Not sure what the real issue is. Replace EGR valve? Do tuneup? Pull manifold? Anyone know what the real issue is and what the dealers are doing?

 

i take it to the dealer when the emission comes up for your car..if you do it now sometime later it may come back, up to u...i think they use the Bg cans. try the bg can i heard they werk

 

my friend's lexus had similar problem, and when i replaced the sensor that sits on top of EGR valve, the code didn't come back. I know that's an issue with toyotas..
and i believe the dealer wanted to replace the whole valve..

how did you manually move the valve? did you apply air pressure?
if you did, and the valve came right back up when the pressure was released then the valve is fine. like i said, could be the sensor on the valve, or some other valve down the line, that isn't sending air pressure to the EGR valve when its supposed to.

 

Low EGR flow is set when the computer detects that expected EGR flow is inconsistent w/ manifold pressure (MAP sensor). When EGR is opened, MP should change and if change is inconsistent w/ known (lift sensor) EGR lift, P401 gets set. There must be an internal ECU map of the expected MP change vs. EGR lift position.

A non-functioning EGR lift sensor should set a different code (P1491, P1498), however a "off-calibration" lift sensor might set P401 by reporting a false lift postion; say implying more lift than actually was achieved.

A failed EGR solenoid valve that switches the EGR vacuum on/off to the EGR valve could cause a P401 also.

Gets a bit complicated!

Most likely, its the EGR distribution into the engine (some are blocked) , but it might be something as above.

Good Luck