PearlH22

I've had the good ol' insufficient EGR flow CEL for almost a year now and finally found an easy way to get rid of it. I was told I had to remove the six EGR ports but was doing some research on H-T and found that an easier way using Seafoam.

1. Remove EGR valve.
2. Fill two holes with Seafoam.
3. Put EGR valve back on and let sit for 5 minutes.
4. Start it up and let it run.
5. Reset ECU (Pull clock radio fuse under hood)
6. Drive it around until the white smoke goes away.
7. You're done!

I haven't seen the CEL in about 32 hours. When attempting to clear the code previously, it would come back on the same day.

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Gerhard

My experience is that the EGR valve itself tends to become stuck... as in the needle does not move up and down easily due to carbon build up on it.

Basically, all you do it clean the carbon out of the valve and push the needle up (and let it fall back down) until it moves cleanly.

That's generally what causes the EGR related CELs.

A blocked EGR port generally causes misfires, and those have specific CEL codes.

paulyg

Not true. I had insuffiecent flow, CEL 80. Took off and cleaned out EGR. It came back on a month later. Took it off, cleaned again and flooded the ports with carb cleaner. This time it came immediatly back on. I ended up taking the manifold off to clean the ports. Each cylinder port was plugged up and the "galley" that goes from the EGR to cyl 1 was also full of gunk. I had to use a coat hanger to unclog the ports (small little holes in the top of the intake runners) and drilled out the one plug at the end of the galley (cyl 1 end) and used a kitched skewer to break up what was in there. And a whole bottle of car cleaner.

But I'm glad you were able to get fix it was the seafoam PearlH22.

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Paul
2009 Mazdaspeed3 | 1995 Miata | 1999 Crystal Blue Base - bought 6/13/02, sold 3/11/09

Gerhard

Of course it true... otherwise I wouldn't have posted it -grin-

Of course, this brings up something else I was thinking about: How much oil do the two of you burn?

Daemione

Yup, I was able to clear up my insufficient EGR flow CEL w/ Seafoam as well. Ran like absolute garbage for a solid 20 or 30 miles, but then cleared up, and haven't seen the CEL since (a year & a half or so).

paulyg

1 qt/700-1000 miles

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Paul
2009 Mazdaspeed3 | 1995 Miata | 1999 Crystal Blue Base - bought 6/13/02, sold 3/11/09

Daemione

^^ that's about what I go through as well. Although some of that was from a slow leak around the oil pan seal, which I just fixed the other week - so mine might have improved slightly.

I know I burn some through the valve seals (blue smoke on startup), and am pretty sure I have bad oil rings as well.