Dreded ERG valve (1 Viewer)

[Rics4rnr]

So I decided to work on my 80 to tackle the dreded P0402 code for the ERG valve. I read alot of threads about the ERG problems so purchased upper plenum gaskets, throttle body gasket, and the ERG valve. After taking the upper plenum apart I found the port from the throttle body to the ERG port had carbon build up. Now after cleaning the intake pleum the truck accelerates so much better.

 

[Pacer]

That's great, is that all it was?
That truck was fast even when I had it.

 

[Rics4rnr]

Yes it took a while to figure out the problem and I tried everything from cleaning out the carb, Seafoam treatment, and replacing the vacuum hoses. So the last resort was to do upper intake removal and cleaning. I also cleaned out the lower plenum and after putting everything together you can tell the difference during acceleration.

 

[brian]

How much crap was in the plenum?

 

[Rics4rnr]

Well the ERG port was pretty much clog and about 1mm of crap in the plenum. I used 3 cans of throttle body cleaner to get most of gunk out. I wish I took some pictures but you how it goes you get busy trying to find everything back together.