enine wont start right away after 7 seconds try again then barely starts then on 1999 Ford Explorer

runs good,what do you think is going on? plugs year old.

Asked by for the 1999 Ford Explorer
have fuel pressure tested to start with or poss dirty idle air control
2 more answers
I agree with both #1 and#2
does this happen every time or when the vehicle sits for a while? try this...before starting turn key to on position for a few seconds and then off and repeat 3 or for times before starting, listen for the buzz noise of the fuel pump, fuel pump only runs a few seconds untill the engine starts. Listen carefully for it to run and when it stops turn off and the back on listening for pump again, should start right up after 3 or 4 cycles.