I believe I have found the culprit but need you to double check what I have done to be sure of my findings:

I tested vacuum from the evr outlet----got nothing (idle or part throttle)

I tested the vacuum line to the evr------got nothing

I traced the vac line to the evr back to a coffee can looking canister ( maybe this is the accumulator you mentioned). I checked vacuum going into the canister (accumulator) and the vacuum coming out of the canister-------checked out okay

I isolated the vac line (vac line is a hard line larger than others and black, if that matters) from the canister (accumulator or coffee can looking thing) to the evr and put vacuum on it--------got nothing ( I am not hearing a vac leak so this is deceptive). At this point I am considering the vac line faulty and will replace the vac line. Unless there is another valve of some kind attached to it, that I didn't see. I found nothing but the line so again I am considering it faulty.


Upon finding this I directed full manifold vacuum to the evr inlet and put a gauge on the evr outlet to the egr-----------showed nothing at idle or with throttle applied.

I tested the evr harness for volts received 10.5 per instuctions so it is getting power.

I tested resistance across the evr solenoid terminal and got something just shy of somewhat <20. I was supposed to get between 20-70 ohm. Being it was on the low side and when I connected full manifold vacuum to the inlet and a gauge to the outlet and got nothing at all at idle or with throttle, so I am considering the solenoid faulty as well.

I am gonna replace the evr solenoid and the vacuum line, unless you give me a reason not too. I am gonna pick up or order the part tomorrow, so let me know something if you will. Again thank you for your time, and assistance.

 

Someone mentioned on another thread that the evr outlet will not show vacuum at idle, only under running conditions will proper engine temp. So I am gonna run a vac line directly from the accumulator (coffee can looking thing) to the evr inlet and see if I can run the vehicle without the engine light coming on. The evr ohm test was very close so this might rule out it being faulty. Sounds like a primitive method that might work. Again let me know what you think, does it sound like I am on the right track? later

 

Well Okie Dax it seems to be fixed I ran the vacuum line from the acumulator to the evr, and ran it up the road for a few miles. No "check engine light". Appears fixed. I appreciate your assistance and time. Thanks again, later

 

Looks like you got it nailed. If that code reappears in the near future, look to the evr, I have seen vacuum leaks cause the evr to get overworked and fail. Last one I saw ohmed out on the low side similar to yours.

I would make sure the codes are cleared and drive it for a few days and check codes again, 332 doesn't always light up the "check engine" right away.

 

I will check the codes in a few days to be sure then, should 332 pop back up I will change the evr, no biggie. Appreciate your assitance once again

 

I hope your problem is solved. That is just about the same problem I had with my truck this summer. The evr was the last thing I looked at; I had already replaced the evp sensor and taken apart the egr valve and cleaned it. I decided to replace all of the vacuum lines since that is cheap, and finally had the evr changed. I could only get that part at a dealership and it was about 40 bucks. Also, I think the coffee can thing is responsible for capturing vapors from the gas tanks.

 

sicbpguy,

There are actually two "coffee can things" on most newer vehicles. They can be of various shapes. You are right about one capturing fuel vapor. That one is called a charcoal canister, it is part of an evaporative emissions control system that prevents the escape of fuel vapor from the fuel tank to atmosphere. The one refered to in this thread is a vacuum accumulator, it is an empty canister that is part of the vacuum system that "stores" vacuum so as to provide a more constant vacuum signal to vacuum controlled devices. And since it is part of the vacuum system it is also a possible source of vacuum leak.

 

Okie Dax, thanks for the update, I am always trying to figure out more about these things. I have an '88 300 and only 1 "coffee can" like you described.