Mystery part in engine

[eclipsed at 3am]

I figured I would put this in problem diagnosis, seeing as how im having a problem identifying this part. lol.

One of the lines from my boost controller came loose last night, so i was putting it back on today. Then I was poking around the engine just looking at different things. I dont get much time in the bright daylight to look at the car or anything. Anyways, I came upon this. It was exactly in this condition, with the hose not attached or anything. Can anyone tell me what it is? Its behind the motor, just under the throttle body. I circled it in white.

[david-b]

Looks like the EGR valve. Top of mine looks exactly the same. Same shape and has the little vacuum hose coming out of it. Mine fell off once (no clue how) and it threw a CEL.

[defiancy]

Originally Posted by eclipsed at 3am

I figured I would put this in problem diagnosis, seeing as how im having a problem identifying this part. lol.

One of the lines from my boost controller came loose last night, so i was putting it back on today. Then I was poking around the engine just looking at different things. I dont get much time in the bright daylight to look at the car or anything. Anyways, I came upon this. It was exactly in this condition, with the hose not attached or anything. Can anyone tell me what it is? Its behind the motor, just under the throttle body. I circled it in white.

Yep EGR, don't need it, it's for emissions.

[eclipsed at 3am]

I dunno if its just psychological, but plugging it back on and ziptying it seemed to make my car run a little smoother. hmm...cant hurt though right?

[gthompson97]

A more clear picture would help. David, he's running a 4g63 and it's quite a bit different. But definitely keep it plugged in, but give us a more clear picture.

[sganc4life_4]

EGR will make your car run smoother, I remember learning it but it causes a rough idle after warmed up but not at WOT.

[Talon69]

Originally Posted by sganc4life_4

EGR will make your car run smoother, I remember learning it but it causes a rough idle after warmed up but not at WOT.

Unless you have dsmlink I blocked mine off like alot of people and did away with a shit load of vacumme lines

[david-b]

Originally Posted by gthompson97

A more clear picture would help. David, he's running a 4g63 and it's quite a bit different. But definitely keep it plugged in, but give us a more clear picture.

I know he is. You can still tell its the EGR valve though. The system itself is still the same too.

[ez1286]

When thatline was disconnected it could have been making your car run shitty for 2 reasons, first that would be a boost leak, not huge but even a small one can have a negative effect, second it could have caused your car to go into "safe mode" because an emmisions control system wasn't working basically the ecu makes the car run shitty so you can limp it to the mechanic.

[Thor06]

Yeah looked like the BOV to me at first and I was like, uhhhhhhh....

Yeah, thats your EGR and replugging it in will make it run better. Congratulations.

[eclipsed at 3am]

if having the egr unplugged would put it in safe mode, does anything have to be reset, now that ive plugged it back in?

[david-b]

It's usually just good to reset the ECU just in case. Disconnect the neg(-) battery and let it sit for 10 minutes. Should get everything fine then

[Thor06]

Doesnt it actually only take like 10 seconds? Cant hurt to let it sit longer though.

[Blackcrow64]

I can't wait to see all the problems I get from everything I've removed. lol

[eclipsed at 3am]

taking off that battery cable like that wont affect the safc would it?