New Fuel Pump, still struggles on cold startup

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Sep 23, 2020 | 12:08 PM

zefrum

Thread Starter

Senior Member

Joined: Nov 2009

Posts: 149

From: The Woodlands, TX

New Fuel Pump, still struggles on cold startup

Just replaced the fuel pump but on cold startups, the engine still struggles. No codes thrown. Any ideas what to check?

Sep 23, 2020 | 12:09 PM

bronxteck

Senior Member

Joined: Apr 2019

Posts: 3,192

From: BX NY North East

check the intake manifold for leaks when cold. retorque the intake bolts.

Sep 24, 2020 | 06:31 PM

Happy Hummer

Senior Member

Joined: Oct 2011

Posts: 1,655

From: Wisconsin

Verify that your getting proper fuel to the rail. To each injector. Also, check your grounds and your voltage for your C.O.P.

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