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Old 06-11-2012, 03:32 AM   #1
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Default 1.6 fuel rail leak?

Anybody have their fuel rail leak where the injector fitting is pressed into the rail?

My RX-7 460s were rebuilt by RC engineering less than two years ago, and I just installed $60 worth of seals. Brand new Mazda upper and lower seals, plus isolators, but I don't think they seal.

I'm still having an issue with a wet #4 injector. It doesn't seem to be the FPR, although it is directly above it. Years ago (8ish) I replaced the FPR thinking it was bad, but it wasn't. Point is it's old, but not 20 years old.
#1

#2

#3

and a couple shots of #4



You can see the discoloration on the red plastic (that's wet fuel) and the tan staining on the metal barrel below.
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Old 06-11-2012, 10:21 AM   #2
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only when I install them without any grease and tear the o-ring.
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Old 06-11-2012, 02:14 PM   #3
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Greased with engine oil before inserting, they couldn't of gone in easier. Just a sloppy "pop" when they seated. I highly doubt they're torn. I replaced all 3 rubber pieces when I saw some cracking on the isolator (which doesn't even see fuel) thinking that was the issue. All 4 old o-rings came off looking fine, and the new ones went on easily with the oil.

I'm going to try and clean that little groove around the seat and see if I can see anything.
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Old 06-11-2012, 02:51 PM   #4
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Can anyone say Capped-Do-It-Yourself-Dual-Feed-Fuel-Rail-Fail 10 times fast?

Jumped the fuel pump, kinked the return line, and found fairly quickly where the fuel was coming from. Got about a full turn out of the NPT plug, hopefully the issue is resolved. I'll check back later.

Still kinda wished it was an excuse for a new fuel rail...
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