idle problem with 99 ranger 4.0

[camk7]

Hey guys i have a 99 ranger sport 4.0l and i have a problem with it idling when its cold. When i first start it it will start up and then die out. It will run fine once itd warmed up. I Changed the maf sensor, the iac valve, and the tps and the problem still continues. Also checked for vaccum leak. Any ideas?

 

[backroad101]

Spark plugs and wires. Have you gotten a check engine light yet?

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