Does a 1994 GSR have an EGR valve? I've heard conflicting information.
05-24-2011, 12:56 PM
#3
Apathy Kills
No. That's the vacuum fitting for the secondary intake butterflies.
Neither the second or third-gen Integras use EGR. But you do need to replace the PCV valve in the course of a tune-up.
I do mine with every set of spark plugs (30K).
Neither the second or third-gen Integras use EGR. But you do need to replace the PCV valve in the course of a tune-up.
I do mine with every set of spark plugs (30K).
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Last edited by TheOtherDave™; 05-24-2011 at 12:58 PM.
05-24-2011, 01:03 PM
#4
I still like honda's. :-/
Thread Starter
Ahhh. That makes sense. It's my buddies car, keeps failing emissions. Changed the cat, o2 sensor, plugs, wires, pcv valve, and put on an AFPR, but it keeps failing.
Not sure what else to do.
Any ideas?
---------- Post added at 02:03 PM ---------- Previous post was at 01:59 PM ----------
Is that the IAB (Intake Air Bypass)?
Not sure what else to do.
Any ideas?
---------- Post added at 02:03 PM ---------- Previous post was at 01:59 PM ----------
Is that the IAB (Intake Air Bypass)?
05-24-2011, 01:12 PM
#5
Apathy Kills
Since you've asked about EGR, I take it the car fails because of high NOx.
First guess is it's running lean and that the aftermarket FPR is to blame.
If you've got the stock FPR, and its working, I would switch back to it for the re-test.
Belt-and-suspenders, put the OEM intake back on as well.
First guess is it's running lean and that the aftermarket FPR is to blame.
If you've got the stock FPR, and its working, I would switch back to it for the re-test.
Belt-and-suspenders, put the OEM intake back on as well.
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05-24-2011, 01:19 PM
#6
I still like honda's. :-/
Thread Starter
Since you've asked about EGR, I take it the car fails because of high NOx.
First guess is it's running lean and that the aftermarket FPR is to blame.
If you've got the stock FPR, and its working, I would switch back to it for the re-test.
Belt-and-suspenders, put the OEM intake back on as well.
First guess is it's running lean and that the aftermarket FPR is to blame.
If you've got the stock FPR, and its working, I would switch back to it for the re-test.
Belt-and-suspenders, put the OEM intake back on as well.
Put a new cat on, it passed everything but NOX.
So we got the AFPR and turned the fuel pressure up a bit, it then failed HCO and NOX again, but even worse than the original time.
Turned the fuel pressure down quite a bit, and it failed NOX.
It's getting quite frustrating.
05-24-2011, 01:22 PM
#7
Apathy Kills
Originally Posted by dE.fUsEd
Is that the IAB (Intake Air Bypass)?
All that vacuum hose is doing is drawing against a solenoid valve.
Once that valve is opened, engine vacuum is used (via a diaphragm) to open the butterfly valves and give the intake charge a shorter path.
It's possible you've got a vacuum leak in either the feed hose, or the IAB check valve, but my money is on the aftermarket FPR as the source of your problems.
It first failed HCO and NOX. We didn't know it didn't have a cat.
Put a new cat on, it passed everything but NOX.
So we got the AFPR and turned the fuel pressure up a bit, it then failed HCO and NOX again, but even worse than the original time.
Turned the fuel pressure down quite a bit, and it failed NOX.
It's getting quite frustrating.]
Put a new cat on, it passed everything but NOX.
So we got the AFPR and turned the fuel pressure up a bit, it then failed HCO and NOX again, but even worse than the original time.
Turned the fuel pressure down quite a bit, and it failed NOX.
It's getting quite frustrating.
]
Rather than blindly chase a correct air:fuel ratio with a questionable FPR, I'd just bite the bullet and replace it with an OEM unit.
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Last edited by TheOtherDave™; 05-24-2011 at 01:29 PM.
