EGR system cleaning - do i have to?
#1
EGR system cleaning - do i have to?
Hey all,
99 Mazda b25, 140k. Got a CE light yesterday, had it scanned and got the P0401 code, insufficient flow through EGR valve. I bought the valve and it looks like an easy swap, the valve is just sticking out the top of the TB. However i had the same thing happen to me on a 4.6 crown vic which required completely dissasembling the entire EGR system, intake mani and throttle body and cleaning out these channels that were full of carbon crud. On that engine some of it was really hard to get at, lots of sweating and cursing, took some time but was the real root of the problem, not the valve. Anyone ever take on this job in a 2.5 4banger? Any advice like special tools needed, tricky bolts, etc would be great. Thanks guys.
99 Mazda b25, 140k. Got a CE light yesterday, had it scanned and got the P0401 code, insufficient flow through EGR valve. I bought the valve and it looks like an easy swap, the valve is just sticking out the top of the TB. However i had the same thing happen to me on a 4.6 crown vic which required completely dissasembling the entire EGR system, intake mani and throttle body and cleaning out these channels that were full of carbon crud. On that engine some of it was really hard to get at, lots of sweating and cursing, took some time but was the real root of the problem, not the valve. Anyone ever take on this job in a 2.5 4banger? Any advice like special tools needed, tricky bolts, etc would be great. Thanks guys.
#2
I cleaned the throttle body and upper intake when I changed the spark plugs. Nothing really tricky or hard, you just have to use some long extensions on the bottom two bolts of the throttle body. I don't really remember any hard to get to nooks or crannies, I would try to replace the egr gasket when you are doing it because they can flake apart when you disconnect the valve. Use a good scraper to get the gasket material off.
#4
thanks guys. Funny thing, driving out to the range the other day i got on the gas to pass someone and the CL light went off! i guess something was stuck in the valve and it got blown out at WOT. So ill hang on to the valve and gasket i bought for a bit and see if it come back on, but i;m gonna let it ride for now.
#7
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skillzo1
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01-17-2012 01:27 PM