Inspire Poor Cold Start

Hey there, I had a similar issue with my Inspire, although I can't recall the exact year. Those symptoms sound very familiar. Poor cold starts and rough running definitely point towards a fuel delivery problem. Have you tried checking the fuel pressure at the rail? Also, it might be worth scoping the injector signal to see if it's firing correctly. A defective injection valve or injector could certainly be the culprit.

Thanks for the quick reply! I haven't checked the fuel pressure at the rail yet, that's a good shout. I don't have a scope handy, unfortunately. If the fuel pressure checks out, is there a reliable way to confirm the injector is the issue without pulling it and having it professionally tested?

Without a scope or proper testing equipment, it's tricky to definitively confirm the injector. If the fuel pressure is good, you're kind of stuck. You could try listening to each injector with a screwdriver as a makeshift stethoscope to see if they're clicking, but that's not very accurate. Honestly, at this point, to save yourself time and potential headaches, I'd recommend taking it to a reputable workshop. They can diagnose it properly and replace the faulty injector. It'll likely cost around 515€, but it'll save you a lot of guesswork.

Thanks for the advice, I appreciate it. I took it to a local workshop, and after a diagnostic, it turned out to be exactly what we suspected: a faulty cold start injector. They replaced it, and the car is running perfectly now. I'll keep the fuel pressure check in mind for future reference!