extended crank time

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Dec 17, 2021 | 07:23 PM

96f150

Thread Starter

Fleet Mechanic

Joined: Nov 2000

Posts: 1,713

Likes: 2

From: In my House

extended crank time

.....01 5.4L with 212k.....Ive got a longer than normal crank time which only does it from cold start. Doesnt do it when you shut it off and restart 10 min later. Used Torque app....no codes....I DO have:
TID $01 CID$11
TID $01 CID $21
TID $03 CID$01
TID$03 CID $02

no misfires at all

I dont know much about how to read the TID's

any advice on where to start?

Thanks

Dec 17, 2021 | 09:48 PM

Johnny Paycheck

Fleet Mechanic

Joined: Jul 2019

Posts: 1,315

Likes: 312

I’d definitely hit the schrader valve with a fuel pressure check. I’m thinking the pressure regulator is bleeding off over some time, but you’d find that with said test.

Dec 18, 2021 | 07:26 AM

projectSHO89

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Joined: Jan 2004

Posts: 19,762

Likes: 1,079

From: St Louis

Yeah, it's likely a pressure leakdown problem. Torque (or a scan tool) probably isn't going to help you with that type of issue.

Quick check is, after an extended shutdown that should trigger the symptom, to cycle the ignition from OFF to RUN (not START), wait 3 seconds, then switch it back to OFF. Repeat several times then hit it to the START position. If the engine fires up immediately, that usually confirms the leakdown thesis.