Replaced the intake and now my '05 Titan won't start

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! I think together, we can bring this Titan back to life! A few things could be going on. Double-check all the connections around the intake. Sometimes, sensors like the mass air flow (MAF) sensor or other wiring might be loose or disconnected. Make sure there are no air leaks around the intake, as any gaps can mess with the air-fuel mixture. Also, check that all the vacuum lines are reconnected properly. It’s less likely to be an issue with the immobilizer or ECU unless you’ve also had other electrical problems. Focus on the areas you worked on first – it’s often something simple like a missed connection or a sensor not plugged back in correctly. If everything seems fine and it still won’t start, you might want to have a mechanic do a deeper dive, but start with the intake and sensor checks. Good luck, and hope you get your Titan running again soon! If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!