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03 Wakesetter 383 Hammerhead won’t start without throttle up

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Hey guys, this is my first post after reading many troubleshooting guides on here so hopefully this works out for me. I have a 2003 Malibu setter 23 LSV with a 383 hammerhead and it’s been running great for the last year since I bought it, when I went to winterize it, it wouldn’t start up. It would just crank and crank and crank, but not fire up. I pulled the little silver pin and gave it a little bit of throttle and it fired up right away. Before I take it to the Malibu dealer is there any suggestions on what I should try and look at? I’ve read maybe it’s the throttle body that needs to be cleaned?

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Always a good idea to clean the throttle body first.  You could also consider a full tune up including plug wires if it has been a while.

I would test the fuel pressure, check the temperature sensor (for the ECM), and if that doesn't do it, take a good look at the IAC (which you just cleaned in the throttle body).

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