Less than a week after returning from the dealership (new head gasket, timing chain, tensioner, rails, guides, belt and belt tensioner), the 'Check Engine' light on my 1993 300E2.8 has reappeared, and I pulled code 26 (upshift delay switchover valve) from the diagnostic module.
I want to confirm that this is the switchover valve before I start some vacuum diagnosis tomorrow (engine is still warm, and I believe I need to do this when cold):
The other code I pulled was code 5 - EGR malfunction. Could this be something as simple as a blocked tube (it was apparently disconnected, and the dealer reconnected it). The tube they pointed out seems to thread a different way around the engine than some of the other photos I've seen - this one starts under the air intake manifold and threads around the front of the engine, but I've seen others thread around the back from the AT dipstick and then back to the manifold - am I looking at two different tubes?
08-13-2005, 10:02 PM
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