05 Hard Start?

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03-06-2019, 11:10 AM

A70Runner

Thread Starter

Join Date: Jun 2018

Location: NC

Posts: 10

05 Hard Start?

My daughters 05 4.0 Mustang is slow to start when it’s cold. Seems like it takes a long time cranking to start. (Almost like a cold diesel). When it’s warm it starts right up. Not throwing any codes. Anyone else ever have this problem?

Changed wires and plugs about 10k ago.

thanks!

05-20-2019, 11:51 PM

jetmec

Join Date: Mar 2019

Location: none

Posts: 6

Hi it could be the warm up valve on the fuel injection system

05-21-2019, 02:12 PM

Derf00

Gentleman's Relish

Join Date: Feb 2005

Location: AZ

Posts: 13,090

Quote:

Originally Posted by jetmec

Hi it could be the warm up valve on the fuel injection system

The what? No such thing on a mustang of any year. That type of part is usually found on older German vehicles.

05-21-2019, 02:41 PM

jetmec

Join Date: Mar 2019

Location: none

Posts: 6

Quote:

Originally Posted by Derf00

The what? No such thing on a mustang of any year. That type of part is usually found on older German vehicles.

Yes there is! It might have another name but it's the fuel injection equivalent of a choke, basically it provided more fuel at start up when the engine is cold

05-21-2019, 03:36 PM

artsvettes73

2nd Gear Member

Join Date: Oct 2011

Location: NJ

Posts: 193

Quote:

Originally Posted by jetmec

Yes there is! It might have another name but it's the fuel injection equivalent of a choke, basically it provided more fuel at start up when the engine is cold

Sorry, No such animal on the Mustang