AIR Injection Pipe Broken
New User
Joined: Oct 2001
Posts: 1
Likes: 0
AIR Injection Pipe Broken
Hey Guys,
I have a 2x2, 1987 F150 with a EFI 300 straight 6 w/ 133k miles. The truck runs really good but it's been noisy under throttle. It’s definitely an exhaust noise. When I opened the hood and rev’d the engine by hand the noise seemed to be coming from the AIR tube that connects to the cylinder head. I’ve since determined this is the “AIR Injection Pipe.?E After I remove the upper intake manifold I found that 3 of 6 small tubes that run from the AIR Injection Pipe to the exhaust manifold were loose and broken.
I removed the pipe and they are in very bad shape. A new one costs about $80 and has to be special ordered. Do I have any alternatives? I’ve heard stories about plugging the AIR injection holes. Since the rest of the emissions is intact (cat, air pump, vacuum lines, etc.), the truck runs fine and it’s used mostly on a farm (off road) where emissions aren’t applicable and I'm not going to sell it what can I expect if I plug the holes? I should add I live in a non emisions testing area. The trucks got so many miles I’d rather not spend the money
Thanks,
Larry
I have a 2x2, 1987 F150 with a EFI 300 straight 6 w/ 133k miles. The truck runs really good but it's been noisy under throttle. It’s definitely an exhaust noise. When I opened the hood and rev’d the engine by hand the noise seemed to be coming from the AIR tube that connects to the cylinder head. I’ve since determined this is the “AIR Injection Pipe.?E After I remove the upper intake manifold I found that 3 of 6 small tubes that run from the AIR Injection Pipe to the exhaust manifold were loose and broken.
I removed the pipe and they are in very bad shape. A new one costs about $80 and has to be special ordered. Do I have any alternatives? I’ve heard stories about plugging the AIR injection holes. Since the rest of the emissions is intact (cat, air pump, vacuum lines, etc.), the truck runs fine and it’s used mostly on a farm (off road) where emissions aren’t applicable and I'm not going to sell it what can I expect if I plug the holes? I should add I live in a non emisions testing area. The trucks got so many miles I’d rather not spend the money
Thanks,
Larry
Thread Starter
|
Posting Guru
Joined: Mar 2001
Posts: 1,494
Likes: 0
AIR Injection Pipe Broken
Sure, if you don't live where emission testing goes on you can start ripping stuff off. But you need to know what the stuff is if you ever have to put it back on + there's probably a computer that actively tunes your engine assuming these goodies are hooked up. I'm sure someone in this forum can give you the how to scoop.
Senior User
Joined: Sep 2001
Posts: 169
Likes: 0
AIR Injection Pipe Broken
I have seen several where the air induction pipes have been removed and soft bolts have been threaded into the head. I would be careful, the holes go through, so don't disturb your exhaust flow if you put them in. I agree that it probably will effect some feedback to your computer from your O2 sensor. What the air induction system does is add fresh air to the exhaust to make O2 available in the cats to convert any CO to CO2. Herman
Thread
Thread Starter
Forum
Replies
Last Post
