Slow to start F150

Maintenance/Repairs
1

2003 F150 V6 automatic 123K 2WD single cab long bed and yes…its white in color - so we all know exactly what we’re talking about!

Occasionally it takes longer to start then normal. Battery is good, spark plugs are new. Runs great once its started. It turns over fast and everything. So electrical doesnt seem to be the issue but my guess is low fuel pressure or something.

Truck runs happy once started so I dont know that it would indicate a bad fuel pump.

Ideas?

2

The problem might be caused by a bad anti drain-back valve on the fuel pump.

The next time it takes long to start, turn the ignition switch off. Then turn the ignition to the run position for two seconds, and then turn the ignition switch off.

Repeat this a half dozen times and then try starting the engine. If the engine starts right up, the problem is with the anti drain-back valve.

Tester