Voyager Diesel Stumbles: Bad Injectors Kill Performance

Having experienced nearly identical symptoms with my 2004 Grand Voyager CRD, this sounds exactly like a fuel injector issue. The rough running and weak acceleration are classic signs of a faulty injector not atomizing fuel properly, leading to an incorrect air-fuel ratio. My vehicle displayed similar symptoms, sluggish response, jerky acceleration, and rough idle. After diagnostic testing, it turned out two injectors were defective and needed replacement. The oxygen sensor readings confirmed the engine was running lean, which explains the performance issues. The repair involved removing and testing all injectors, cleaning the throttle body, and checking the intake manifold for carbon buildup. The problematic injectors were causing uneven fuel distribution, leading to poor combustion and reduced power. This is considered a serious issue that requires prompt attention, as faulty injectors can lead to: Further engine damage, Increased fuel consumption, Failed emissions tests, Additional carbon buildup Make sure the new shop performs proper diagnostic testing before replacing parts. The EGR valve should also be inspected, as its operation can affect similar symptoms. Definitely have this checked soon, as running too lean can cause long-term engine damage.

Thanks for sharing those details about the injector problems. My 2006 Chrysler had almost the same issues last year. The check engine light came on and the engine felt really rough, especially during acceleration. The fuel injectors were definitely the culprit, plus they found the oxygen sensor was shot when they did the diagnostics. Just wondering, what did the total repair cost end up being for your injector replacement? Also, has everything been running smoothly since the fix, or have you noticed any other issues pop up? My repair was a few months back and the engine still runs great, but I like to hear how these fixes hold up long-term.

After getting the injector issues resolved at a reputable shop, the vehicle has been running perfectly for almost 8 months now. The total repair came to 515€, which covered replacing the faulty injection valve and performing necessary diagnostic tests. They confirmed the engine was running too lean and corrected the fuel mixture during the repair. The throttle response is now much smoother, and the rough running issues have completely disappeared. The oxygen sensor readings are now within normal range, showing proper air-fuel mixture. No check engine light since the repair, and fuel economy has actually improved slightly. My advice would be to always get the injectors checked when experiencing these symptoms, as running too lean can damage the catalytic converter over time. Regular maintenance of the fuel system, including occasional throttle body cleaning, helps prevent these issues from recurring. Based on both our experiences, proper diagnosis and repair of fuel system components seems to provide a lasting solution for these common diesel engine problems.

Thanks for the input. After reading your experiences, I took my Voyager to a new mechanic last week. The mass air flow sensor was also acting up along with two faulty injectors. Total bill came to 680€, not cheap but worth every cent. The mechanic showed me the dirty injectors and explained how they were causing the lean condition. They did a complete fuel system cleaning, replaced the bad parts, and ran full diagnostics to make sure everything was sorted. Been driving for a week now and what a difference. No more check engine light, engine runs smooth as silk, and the acceleration is back to normal. Even got slightly better fuel economy. Glad I dealt with it before any serious damage happened to the catalytic converter. Just wanted to close the loop and share how it worked out. Big thanks for pointing me in the right direction with the diagnosis.