T7BSY Posted August 28, 2016 Share Posted August 28, 2016 Hi, I have a C-max 1.8 2007 mk1 showing 112000 miles, just had a full service, oil and filters, air filter and new plugs, to try and get rid of a problem im having at low revs between 800 and 1200 rpm's, today i have also had the air filter box off and sprayed some wd40 fast drying contact spray through the air intake throttle valve, slight improvement i think, but it hard to be sure, cant see an EGR valve or i would remove and clean that next, also added REDEX to two full tanks of fuel, going to try the more expensive fuel next just in case, also considered a remap, dont know enough about petrol cars to hazard any more guesses as what to try next, other than taking it to a garage for a diagnostics doctor for a full examination, so any advice on what to try before i do this would be gratefully appreciated. P.S the problem im having is it is juddering and hesitant within that range, but not 100% of the time, and improves slightly when warm, i have a 1.6 version too and that is smooth and no problems Quote Link to comment Share on other sites More sharing options...
Russ Posted August 28, 2016 Share Posted August 28, 2016 Have you had the leads changed? Check their resistance with a meter to check them. https://www.ngk.de/en/technology-in-detail/ignition-cables/diagnosis/testing-of-ignition-cables/ Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.