After swapping out the upper intake on my 5.0 I have been very pleased with the increase in performance and power but have a nagging EGR problem. I continue to pull a code #34 (I was pulling this before the swap, too). I have replaced the TPS and the EVP sensors and now get an exhaust smell. Could it be related to the new EVP? When I swapped in the HO I used the furnished EGR spacer but used the EGR valve from my SO. Are there HO specific parts that I should use here? And if so, how do I get the numbers? The parts stores just see 5.0.
Also, does anyone know where I can get the longer upper intake bolts to accomodate the phenolic spacer?
I'm unsure about the EGR,I have heard the H.O. part is different,but I really don't believe that.I got my longer bolts at Lowe's.For all 6 to install the spacer under my Explorer manifold,I spent about $1.50.there's other places I'm sure,but that (or a hardware store) is probably your easiest and cheapest bet.
follow the vac line from the egr to the corner right side,replace it.
get stainless bolts at any hardware store,they only cost a few bucks more and won't rust.
I replaced that line when I found cracks in it.
Believe it or not I can't find bolts that are long enough. The bolts that I found that were the right length had the threading stop too soon and hung on the intake.
Did some checks on my '84 T-Bird EGR/EVP that may interest you.
I measured the EVP voltage between the BR/LG wire and the battery ground.
KOEO it was 1.06v
Running the KOER test it stepped up from 1.08v to 1.56 v and back down again.
Took the vacuum hose off the EGR and put a vacuum gauge on it.
Running the KOER test it stepped up tp 17 in/hg and back down again.
Having the vacuum disconnected gave a code 34.
These readings may not match your car but you can tell if the EEC is moving the EGR valve or at least trying to move it,