Window fixed, engine broken...

[bottman5684]

Well, you know how it seems to go sometimes. Fixing the father in laws drivers side window - you know how sometimes they stop giving the 1/4 inch drop when you pull the door handle - and now when you turn the engine over, it idles just fine until you tap the gas, then chug, chug, chug, knock, cough and stop.

Any ideas on the culprit? We disconnected the battery, the airbag plug, and the like to remove the door panel, then zip tied the window regulator line to give a bit more tension so the window would drop as it should. Put the lot back together and - SUPRISE!!! - engine does not idle properly anymore. We are thinking electrical...maybe the variable timing or something? No idea how fixing a window can alter the engine in such a way. Please help, father in law does not yet know the situation and we would love to keep it that way

Thanks for any and all input!

[2003Boxster]

Did you blow the fuel pump fuse? It sounds like a shortage of fuel to the engine...I would start with that.

[very~worn~944]

You disconnected the battery, you might have reset the mixture adaptions. If the car has some minor air leak or failing MAF that it was adapted for, and you reset it...
It's going to idle funny and stumble for the first 15 minutes or so while it relearns. I can't think of anything else related

[jwgn777]

Last member has a good point. Try this Switch ignition on for 1 minute with out starting the engine. Don't press on the throttle. Switch off ignition for 10 seconds. This completes the the adaption of the throttle adjusting unit. Run engine for several minutes until the control module can relearn the idle speed. JW