Rough idle/no rev problem

[tada]

Good result! Might check your measurement though. 2.5 liter has stroke of 72mm or ~2.8 in.

Hey, you said approximate!

Hi Tom,

well zero means, that something is blocked. Right?

Please also check if the left side header and all connections points of the exhaust system on that side for new gaskets and screws - so the question is if some parts were removed lately. I've seen idiots that put in gaskets without holes. And because we don't know what the workshop did…

No, it actually means the cats are free flowing. The gauge reads pressure in psi. I saw puffs on the gauge at all four O2 sensor holes but the pressure was negligible . If the cat was plugged, the readings in front of the cat would be higher.

So I'm running out of ideas. I'll go ahead and remove the throttle body and intake manifold, clean it, and look for any air restrictions to bank two and any vacuum leaks that may be present after getting the parts out of the way.

Any chance this could be a bad DME?

[78F350]

Maybe I missed it, but did you check the cam timing already from the link that "muscatty" posted?
The check is easy enough to do with the engine in.

http://986forum.com/forums/performance-technical-chat/26418-diy-setting-cam-timing-m96.html

[tada]

Originally Posted by 78F350

Maybe I missed it, but did you check the cam timing already from the link that "muscatty" posted?
The check is easy enough to do with the engine in.

http://986forum.com/forums/performance-technical-chat/26418-diy-setting-cam-timing-m96.html

The timing on bank 1 was right on. I posted a pic of bank 2: