Toyota Previa no power AFTER tune up - help!

[oLive]

Greetings All. Newbie here.
So glad to have found this forum!
I have a 95 Previa LE/SC all-trac. Just had expensive tune up done at my reliable mechanic. The car was shaking itself into a tizzy but had plenty of zip and could climb hills at 80+ when I dropped it off at shop. Immed after tune up- NO power! Feels like Im driving a gravel truck pulling a trailer. My mechanic has no clue what to do. I was thinking something got disconnected during tune up - supercharger?
Any thoughts?

Thank you.

[ArashB]

Maybe disconnect the idle air sensor and see if that makes a difference.

[kamesama980]

Remind the mechanic it worked better before he/she touched it. If they can't figure it out, they ought to reconsider touching other peoples stuff and should be be paying to take it to someone who can.

Are YOU going to be troubleshooting this or are you asking on behalf of your "mechanic"?

Go through the motions of what was done as part of the tune up and check every plug and part.

[Carbonized]

I have no experience of the SC Privia but on the Mini I would check the connections between SC and inter-cooler pre-throttle body. That would definitely throw the air flow sensor out of wack and cut on the fuel supply.

[buzz2401]

Nothing around the supercharger should have been touched. My guess is plug wires aren't installed correctly or possibly even the wrong plugs were installed.