Hard starting when warm

Asked by Oct 04, 2012 at 12:17 PM about the 2001 Pontiac Grand Prix GT

Question type: Maintenance & Repair

2001 pontiac grand prix gt, always starts good cold but sometimes when warm acts like its flooded?

3 Answers

1,235

it might be your fuel pressure regulator has gone bad or the hose going to the MAP (manifold air pressure sensor) may be broken

4 out of 4 people think this is helpful.
185

I would check the idle air control valve (IAC).

4 out of 4 people think this is helpful.
735

could be leaky injectors,

1 out of 1 people think this is helpful.

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