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Question

Thermostat change, car doesn't run, help!

Sep 17, 2017 7:14AM PDT

2003 Pontiac grand am 2400, changed thermostat and car doesn't idle. the engine starts if I move the throttle but as soon as it stops moving the engine dies. it sounds like the engine is under heavy restriction and almost like it is about to back fire. With the MAF disconnected the engine runs but runs high to mid RPM constantly changing with no hesitation or sounds of restriction.
Tried changing the MAF but same problem.
I'm really looking for help....

Discussion is locked

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Clarification Request
Not a lot of mechanics here but
Sep 17, 2017 8:09AM PDT

To me I'd be checking if I had disturbed, cracked, unplugged any vacuum lines.

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Answer
Thermostat change, car doesn't run, help!
Sep 17, 2017 2:53PM PDT

Found the problem, a Vacuum line going into the Throttle body under a bracket was disconnected.

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Yeah.
Sep 18, 2017 4:50PM PDT

Nice it was the usual.