lilianloewe58
Renault Modus engine jerking
Summary of the thread
A 2004 Renault Modus with a 1.4 gasoline engine is experiencing uneven running, engine jerking during acceleration, and a check engine light. Possible causes include issues with spark plugs, ignition coils, or a more serious problem like the timing belt. However, a similar case was resolved by identifying an exhaust leak near the manifold, which caused similar symptoms. It is suggested to have the exhaust system pressure tested at a workshop to confirm and address the issue.
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4 comment(s)
lilianloewe58 (community.author)
Thanks for the quick reply! An exhaust leak... that's an interesting thought. I haven't checked specifically for that. Where exactly should I be looking for a leak? And yes, the idling is a bit rough, now that you mention it. Would an exhaust leak really cause such a noticeable jerking when accelerating, though?
alexandermaier16
Well, with mine, the leak was near the manifold, and yeah, it caused a noticeable jerking, especially when accelerating. The rough idle plus the jerking and the check engine light… does sound similar. Honestly, might be best to get it to a workshop and have them pressure test the exhaust system. Could save you a lot of guesswork!
lilianloewe58 (community.author)
Okay, thanks a lot for the advice! I appreciate it. I'll get it checked out at a workshop. It was indeed a leak in the exhaust system. Repair cost me 265€. Thanks again!
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RENAULT
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MODUS
alexandermaier16
Hey there! Sounds frustrating. I had a similar issue with my Renault Modus. Does it almost feel like an engine misfire? Have you checked for any obvious leaks in the exhaust system? That was the culprit for me once. Could also be the oxygen sensor acting up. Is it idling rough as well?