Weak start

[jw_96]

Chevy vortec 5.7 warm start. Only idled up to about 1000 rpms. Usually idles around 800 started 2 times and it did this. Any advice? Normal? Usually goes to 1500 rpm

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[Breakdown]

Does the idle drop or stay at 1000? Could be idle air control or vacuum leak

 

[jw_96]

Does the idle drop or stay at 1000? Could be idle air control or vacuum leak

I was thinking IAC because earlier last week the rpms jumped by themselves.

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