civic hx egr valve deep clean

[firehawk618]

Mine's clean. I tested it and have confirmed the position sensor is totally dead.

I'll order the Odyssey one.

Thanks.

[phh]

Originally Posted by Chrysler kid

Hope this thread helps out others in the future, you should not need a new valve it is simply the manifold being clogged, either from the exhaust or the intake. I believe mine was clogged both ways all the way from the exhaust to the intake manifold. 300k miles of soot

Thanks this thread!

My car has the same problem and I've taken the same actions as you. In addition, my spark plugs were fouled. I cleaned/regapped them and applied Seafoam internally via the vacuum method. I've made one short trip and so far so good.

It's been a few months since your first post, has your issues been resolved?

[iveyjh]

I don't know what I'm doing right, but I have an HX, HF, and 1.0 Metro all with over 200,000 miles and have never had a clogged up EGR system. Watch, now it will start.

[phh]

Originally Posted by iveyjh

I don't know what I'm doing right, but I have an HX, HF, and 1.0 Metro all with over 200,000 miles and have never had a clogged up EGR system. Watch, now it will start.

I'm sure your driving habits are better than mine.

My driving became 100% local driving after changing jobs. I'm still achieving good FE but the trips aren't long enough to allow the engine to burn-off the deposits.

[Chrysler kid]

Originally Posted by iveyjh

I don't know what I'm doing right, but I have an HX, HF, and 1.0 Metro all with over 200,000 miles and have never had a clogged up EGR system. Watch, now it will start.

Just to follow up. Having had a few hx's now the egr system tends to clogue at around 220k-240k depending on the quality of fuel being used, and the amount of regular maintenance such as spark plug and oil changes.

I've spoken with the owner of the car that I started this thread with, and he has not had a single problem with it since I sold it over a year ago.

For reference here is a basic maintenance civic at 242k miles showing the extent of contamination.

This car only suffered from blocked intake passages, my black car suffered from a clogge all the way back up to the egr valve, on both the intake and exhaust side. What most likely caused that issue was only cleaning the intake openings, and gradually the system clogged itself again.

[gone-ot]

EGR = automotive version of "fart sniffing."

[iveyjh]

Originally Posted by iveyjh

I don't know what I'm doing right, but I have an HX, HF, and 1.0 Metro all with over 200,000 miles and have never had a clogged up EGR system. Watch, now it will start.

Well, the time has come, I have the dreaded code at 256,520 miles on my HX. I'll accept that tho, I was having a hard time getting 72 mpg!! Can't wait to see what it gets after a good cleaning.

[MPGomatic]

256k! Awesome! Slambo saw a nice little bump after the wormholes were cleaned. Good luck!

Originally Posted by iveyjh

Well, the time has come, I have the dreaded code at 256,520 miles on my HX. I'll accept that tho, I was having a hard time getting 72 mpg!! Can't wait to see what it gets after a good cleaning.

[iveyjh]

Originally Posted by MPGomatic

256k! Awesome! Slambo saw a nice little bump after the wormholes were cleaned. Good luck!

Finished cleaning egr valve and passages all the way to exhaust manifold . Every port was clogged but not that hard to clean out. I used an old lawn mower throttle cable (cut down) to clean to exhaust manifold. The old girl is back in form again, runs like a champ. I did a short 16 mile loop when I got done and got 132 mpg on the down hill section and 68 mpg on the uphill section. Oh wait, that's 100 mpg avg, wish that was a tank.

Today I did a 251 mile loop through the hill country and used 3.26 gallons for 77 mpg. Ran into a traffic jam on route 281 (wreck) so I know I could get better. Not bad for a quarter million mile vehicle. So about a 10-12 mpg gain. That 251 mile loop was actually 2 loops 1 - 122.5 mile loop (no coasting, just DEFCO) and 1 - 128.5 mile loop (back tracking from wreck) with P&G.