New headers - bung holio

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Jun 29, 2012 | 09:35 AM

jrodimus

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New headers - bung holio

So the shop took the egr off the intake, and left it connected(electrically). Also they removed the o2 sensor on the drivers side. There is a bung on the headers for the o2 sensor on the drivers side. Do i need this o2 sensor? I would think yes due to a cel. Anyone have any opinion on this ?

Jun 29, 2012 | 09:51 AM

Conanski

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From: Ottawa, Ontario

Fill us in on some more detail of what you had done here, is this the 460 truck in your sig or something else? Sounds like this shop isn't qualified to do the work they did, no truck built before 1995 has more than one O2 sensor and it absolutely has to be connected since it's the only feedback the computer gets on what the fuel mixture is. Headers often come with an O2 bung and if it's not used for a sensor then it has to be plugged, if you still have the stock exhaust behind the headers you won't need right now but you may later on. Why they would disconnect the EGR is strange unless the tube connected to the exhaust manifold, if that's the case you're going to need to have a bung welded on the header or you could block off the valve at the intake manifold, but you can't just leave the valve open. The EGR should remain connected and functioning to prevent codes but you can't let any fresh air pass through or the motor will behave like it has a big vacuum leak, hence the need for a blockoff plate between the valve and intake.

Jun 29, 2012 | 10:06 AM

jrodimus

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Details:

yes it is the truck in my sig.

egr removed and blocked off at intake.

bung is plugged in headers, bung is located close to drivers head, dont know which tube it is on, before collectors anyway.

Dual exhaust the rest of the way back.

No other o2 sensors present.

truck runs

Jun 29, 2012 | 10:26 AM

Conanski

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You're getting a CEL because of the missing EGR then, there is no way to completely remove this system and prevent codes the only option is to put the valve back on with the blockoff plate and reconnect vacuum and the position sensor.

Jun 29, 2012 | 10:29 AM

jrodimus

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Sorry Conanski,

The egr is still there, hooked up, vacuum and all, just resting on the drivers side next to the intake. The intake is blocked off where the egr was.

So the code isnt from the missing o2 sensor?

Jun 29, 2012 | 10:43 AM

peter_x

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There is no O2 sensor on the manifold. That bung was either for the EGR or a thermactor tube.

Jun 29, 2012 | 10:49 AM

Conanski

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From: Ottawa, Ontario

Quote:

Originally Posted by jrodimus

The egr is still there, hooked up, vacuum and all, just resting on the drivers side next to the intake. The intake is blocked off where the egr was.

May as well bolt it back on then with the blockoff plate sandwiched between it and the intake.

Quote:

Originally Posted by jrodimus

So the code isnt from the missing o2 sensor?

There is no drivers side O2 sensor on these older trucks so no that's not what you're getting a code for, pull the codes to see what's up.. easy to do with a paper clip if you don't have a code reader.