Hi all
My 2007 3.2 DiD has just reached 400,000 kms a few months ago. Still going well apart from one or two niggles that surfaced recently. (4m41, gen 4).
Most concerning right now, is really difficult starts, especially once the car has been standing.
Had a basic service done recently, so new OEM diesel filter. New battery put in last week, just to be sure. Starter is 9 years old but also reconditioned a few weeks ago. Still experiencing sluggish cranks, and have to crank for 4 or 5 seconds in the morning, sometimes even worse.
Once started, car idles perfect. No smoke. Drives ok too. Subsequent starts in the day are easier but still not normal (in my opinion).
My theory is: even though the starter was reconditioned, it’s probably not full strength anymore and must be replaced. I bought an aftermarket unit from Midas, not yet fitted. Then, I’m wondering if the fuel pressure is dropping after engine is switched off. After standing for 24 hours, starts are really difficult.
Here’s the question: what components are responsible for keeping sufficient fuel pressure for the next start? Some articles say it’s the suction control valve, others say the diesel pump itself has a check valve internal, while elsewhere I’ve heard about a pressure regulator on the rail itself. One report also spoke of a fuel check valve in the fuel filter housing - there by the plunger used for manual priming.
Can anyone tell me which is it?
Thanks
Christoff
