How to clean the EGR in my s13?

[skydragoness]

so, most people know that i have been having erratic idling+hesitation

i read the faq's on 240sx.org, and this is what i have done so far already:

--fuel system service--throttle body cleaned (well not that good, since i was doing it :rolleyes )---new fuel filter

the car runs quieter but still has the same symptoms i was told that the egr can be cleaned with some carb cleaner fluid, but i don't know how to go about doing it...

p.s.

eh, if cleaning the egr doesn't help could it also be my 02 sensor, MAF, or AIV ?

[Thor]

This is what I did:

Similar Post

Since then I have done many other things to my car, albeit none of them are considered "performance" modifications...merely OEM related. There are many different reasons cars don't idle properly...from timing to egr to semi-engaged clutch, etc.

- Dave

[skydragoness]

oh i remember you, your'e the seafoam guy!

i think the 87k on my car may be too young for that stuff

but i will look into the OEM parts

thanx

i still don't know how to clean my EGR... :oface

[Thor]

You're not really going to "clean" the EGR. You can test it...there are a few ways of doing this:

On car Test, EGR- Turn car on- While running, push up on the EGR control valve diaphragm with your finger. When this is done, the engine idle should become rough and uneven.

Removal Test, EGR- Remove EGR valve- Connect vacuum pump ($30 auto store) and apply enough vacuum to open the valve - or suck air through the valve (same difference)- Valve should remain open for 30 seconds- Look for warpage, cracks, and excessive wear around the valve and seat.

B.P.T. Valve if you have one- Disconnect the two vacuum hoses from the valve- Plug one of the ports- While applying pressure to the bottom of the valve, apply vacuum to the unplugged port and check for leakage

V.V.T. Valve if you have one- Disconnect the top and bottom center hoses- Apply a vacuum to the top hose- Check for leaks

The only cleaning that you should do on an EGR valve is removing carbon/deposits from the seat of the valve with a stiff wire brush.

I'm not sure if your '92 is the same as my '90 or not...that is why I question whether or not you have all the same emission components.

Hope this helps, - Dave (umm, yeah, the seafoam guy)

[YomnyM]

can some ne explain what the BPT and the VVT are, how do i know if i have it, i have a 93 240sx SE, thanks.

[bendychicken]

Is it possible to remove the whole EGR system and plug the exuast line going to it? Then leave the battery unplugged for 24 hours to reset the ECU to reconfigure for the lack of the EGR? Would the ECU do that? Or would a reprograming be absoluty the only way to remove the EGR without it running rich?

[NISTECH]

can some ne explain what the BPT and the VVT are, how do i know if i have it, i have a 93 240sx SE, thanks.

the BPT= Back Pressure Transducer. it allows vaccum to travel to the EGR when back pressure builds in the exhaust. yes you should have it on a 93 240. Not sure what WT is but a guess would be Wide open Throttle switch???

[NISTECH]

oh V V T =Variable Valve Timing. If you have DOHC yes you have it. It controls the intake camshaft timing by solonoid.

[YomnyM]

So i shouldn't remove any of these things?? Cause my car has slight hesistation, sputtering under acceleration, andi already replaced the spark plugs and the wires, i don't know what i could be. Thanks for your responses.

[NISTECH]

no do not remove them they will through a code and your performance will be lacking.

[leper421]

oh V V T =Variable Valve Timing. If you have DOHC yes you have it. It controls the intake camshaft timing by solonoid.

None of the KA's have Variable Valve Timing. IIRC there is another acronym for VVT.