richardwagner1
Seat Leon Diesel Engine Trouble
Summary of the thread
A 2003 Seat Leon diesel is experiencing engine trouble, including a check engine light, rough running, reduced power, jerking during acceleration, and stalling at idle. The suspected cause is a mixture preparation error, possibly due to a defective injection valve or injector. Suggestions include checking the Mass Airflow Sensor, Throttle Body, and cleaning the Intake Manifold. Ultimately, a workshop confirmed a faulty fuel injector, which was replaced, resolving the issue.
Did this summary help you solve your problem?
4 comment(s)
richardwagner1 (community.author)
Interesting! You mentioned it was a fuel injection issue for you. Could you elaborate on that? What exactly was the problem, and how did you fix it? Did you also experience jerking during acceleration and stalling at idle, or were your symptoms slightly different? I'm trying to narrow down the possibilities before I start replacing parts.
liamdunkel6
Yes, the jerking and stalling sound very similar to what I experienced. It could be a faulty Fuel Injection. Before doing the replacement, I would recommend going to a trusted workshop. They will run proper diagnostics and pinpoint the exact problem. They should also inspect the Spark Plug as well. Replacing an injector without knowing for sure might be a waste of money. I'm not a mechanic, just someone who's been there, done that!
richardwagner1 (community.author)
I took your advice and went to a workshop. They confirmed it was indeed a faulty fuel injector. After replacing it, the car runs like new! Cost me 515€, but it was worth it. Thanks a lot for your help!
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
SEAT
community_crosslink_rmh_model
LEON
liamdunkel6
Whoa, that sounds eerily familiar! I had almost the exact same symptoms with my Leon (although it's a newer model). Reduced power, engine light on, rough running... the whole shebang. Have you checked the basics, like the Mass Airflow Sensor or the Throttle Body? In my case, it turned out to be a Fuel Injection issue. But before you jump to conclusions, have you tried cleaning the Intake Manifold? A buildup of gunk there can cause similar problems.