General Volvo Chat Post Your Questions And Comments on any of Volvo's many models.

Hard Cold Start 2004 v40

Old 06-17-2018, 10:06 PM
Junior Member
Thread Starter
Join Date: Jun 2018
Posts: 4
Default Hard Cold Start 2004 v40

I am baffled by a cold starting problem. The car is hard to start in the morning but a ok the rest of the day. Here is what has been done so far. The fuel pump has been replaced, the fuel pressure regulator has been replaced, the coolant temperature sensor and thermostat, as well as the idle air control valve has been replaced, I have taken it to three mechanics and they can't figure it out. I have cleaned the MAF sensor but have not replaced it. Where should I look next?

Last edited by jgermano; 06-17-2018 at 10:39 PM.
Old 06-18-2018, 09:16 AM
Join Date: Mar 2012
Location: Ridgefield, CT
Posts: 4,675

have you measured fuel pressure? any puff of black smoke when you do your first cold start? I'd suspect either an intake air leak, the MAF or perhaps a leaky injector which is lowering pressure at the rail.
Old 06-19-2018, 08:17 AM
Junior Member
Thread Starter
Join Date: Jun 2018
Posts: 4

I have not. I will check it and get back to you. Thanks for the reply!
Related Topics
Thread Starter
Last Post
Volvo S40
09-17-2016 04:34 AM
General Volvo Chat
12-31-2015 08:13 AM
Volvo S40
10-26-2011 05:30 PM
Volvo V40
04-22-2009 02:57 PM

Thread Tools
Search this Thread
Quick Reply: Hard Cold Start 2004 v40

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.