Yeah !!! --- P0431 Code

[T2T]

Originally Posted by tom.kutches@gmail.com

So, did the P0431 code go away due to the new o2 sensor (if so before or after the front pre-cat), or due to the anti-foulers?

TomK

The P0431 error went away with the new O2 sensor. Mine was after the pre-cats. I was going to install the Bosch sensor into the anti-foulers, but it wouldn't fit. Apparently, the diameter of the "reader" portion of the Bosch sensor is slightly larger than 1/2" - which is the size of drill bit I used to drill into one of the anti-foulers to make room for the O2 sensor. If you're running the original O2 sensors, a 1/2" bit will provide for enough room. If it's a Bosch O2 sensor, you probably need to look at a 5/8" bit or the next larger size.

[T2T]

I had some time to burn after work, so I thought I'd go through the hassle of waiting in the inspection line - even though I'm a month early for the emissions test. Well, about 4 miles before I got the shop, my CEL came on. I quickly pulled over and reset it. I then drove to the inspection and let my car idle on and off while I was waiting in line.

Sadly, my vehicle failed because the computer was "not ready". ****, I was so close - had that light not appeared when it did, I would have had enough miles on it to go through the inspection without the "not ready" appearing.

[T2T]

I started to remove the intake manifold about 9:15 this evening. I had to let the car cool down for a few hours from when I last drove it - didn't want anything to warp. The removal took me about 1 hour and 45 minutes. I guess I'm glad I don't have the supercharger. The intake manifold gaskets should arrive from Rock Auto tomorrow. Then, this weekend, I can thoroughly give the intake manifold a good cleaning - and, hopefully, get it back together. Also, I have to put new brake pads on all 4 wheels of the car. However, that task can wait a few weeks if it has to. The priority now, is getting the EGR to where it should be.

[wilfredom]

some things u must do is remove the battery, drain radiator & wash the engine area..Oh..those vacuum tubes !! plz make sure how to put them back where each belongs...then..enjoy

[T2T]

Originally Posted by wilfredom

some things u must do is remove the battery, drain radiator & wash the engine area..Oh..those vacuum tubes !! plz make sure how to put them back where each belongs...then..enjoy

The engine was cleaned up pretty good a few weeks back with Gunk and some good water from the hose. In removing the intake manifold, I didn't remove the battery, nor did I drain the cooling system. Things were OK skipping over these steps. I didn't lose really any coolant to speak of - maybe, a cup or so.

Oh ... and, for the best part, I was a bit lazy today. I only worked 4 hours this morning and took some vacation time. I found a local machine shop that would put my intake manifold through their "dishwasher". I was quoted a price of $45.00 for this work. However, it had to be done this afternoon because they are not open on weekends and will close down next week for vacation time.

In the end, my bill was actually $55.00 because the tech wanted to remove some more components from the manifold - the fuel rails, the VRIS actuators and a few other components. He then reinstalled them for me before I got back to the shop to pick up the manifold. They had it in their hands for a little over 2 hours. They also pressure washed it to force out more debris and carbon after the dishwashing was completed. I'll get some pics posted a bit later this evening.

[wilfredom]

Ur investment of $55.00 for the deep clean & peace of mind, knowing ur im is in good shape, certified by an expert, sounds like a good deal..enjoy

[T2T]

Originally Posted by wilfredom

Ur investment of $55.00 for the deep clean & peace of mind, knowing ur im is in good shape, certified by an expert, sounds like a good deal..enjoy

I've posted some pictures of the manifold after the cleaning job in a new thread.