update from my last replacements.
I bought a new check valve and a new air pump. Installed them both and still having a check engine light issue. its so frustrating.
I checked out the board and didn't notice any burnt parts on it. It looked very clean. Even the solder points were ok.
I am not sure what to do next. When I go to the dealer they told me that I need to go through them and have them install an original OEM pump. I feel this is not true because dealers and online sellers get their pumps from Bosch. Furthermore the dealer told me it takes 3 hours to install when it took me all of 30 minutes to install a check valve and the air pump.
I got my pump from here:
Chrysler Crossfire Secondary Air Pump 2004 Smog Pump: eBay Motors (item 270456521715 end time Sep-09-10 12:10:18 PDT)
Mercedes air pump:
http://cgi.ebay.com/ebaymotors/ws/eB...=STRK:MEWNX:IT
The SLK uses the same air pump as the crossfire, so I got the SLK air-pump.
That is the Chrysler air pump. I have the Mercedes version in my crossfire but I don't know if that makes a difference. They both look the same and say Bosch on them. Could there be a electric current difference between the Chyrsler and Mercedes pump? The Mercedes pump was about $50.00 cheaper.
The dealers swears this is an aftermarket part and cannot possibly be authentic. They (dealer) claims the price difference says it all. The dealer wants $800.00 for the part.

I mean are they right? can it be possible that ebay is selling fake Bosch pumps? It didn't look fake at all. looked like my old pump..
I don't know what else to replace. The CEL is intermittent. It comes on from time to time. May stay off for a while, then comes on at random. I don't know what triggers it. I have been researching in the forum and have tried many of the different fixes but still to no avail.
I have even replaced the little blue valve. None of these have worked to silenced the CEL.. I don't think the dealer will be able to do anything I haven't done..
I want to keep my crossfire but this CEL is driving me mad. Anything I might have missed..? They (Dealer) offered me $9,000 for a trade in on a Challenger or Cherokee.. It is appetizing...
While those are both great vehicles, I really want to keep my Crossfire..
Anyone have any ideas? I cannot help but think its gotta be something stupid.. like a old electric cord or something.. And I replaced all these parts for nothing...