By November 11, 2013 1 Comments Read More →

Fuel Injector Cleaning – How Often?

fuel injector cleaningI have a question about my Kia Sedona mini van, I think its a 2006 model but not sure about the engine type or size if that matters.  I was told by the dealership I use that I should have my fuel injectors cleaned periodically and they are recommending I do it now at 60,000 miles.

I am not experiencing a problem and went there to get the 60K mile maintenance stuff done but the manual says nothing about cleaning the injectors. Should I do this repair now? Its $225.

Barbara F.


Hi there Barbara,

If you are not experiencing a problem I would pass on the repair at this time.

1. They are probably just trying to “sell” additional services to you and see which ones you will bite on and pay for and which ones you will pass on. They probably offered other repairs to you as well….right? They know that many people have been brainwashed into thinking fuel injectors needs to be cleaned so they are catering to those people.

2. Most fuel injectors are “self cleaning” for the most part and do not really require any additional repairs or servicing. Using good quality gasoline usually does a good enough job to not need to service the injectors themselves.

3. In many cases the “throttle body” is what should be cleaned periodically not the injectors. The throttle body in layman’s terms is what mixes the fresh air and fuel together inside the engine. If you follow the hard plastic hose from the air cleaner box to where it attaches to the engine the throttle body will be directly behind the end of the hose.

When the throttle body gets dirty it can cause idle speeds to be too low or erratic and engine dying at slow speeds or when you come to a stop.

Here is a video I made of me cleaning my throttle body and you should watch it now.

And this video I am talking about those added “upsells” the dealers like to use



Austin Davis

About the Author:

Austin Davis, consumer car repair advocate. "Hi there! I love to help people solve their car repair problems and I hope my site was helpful to you today. Thank you for stopping by."
  • Ollie W

    Hi Austin. I’m writing from the UK, where over half of road vehicles are diesel, but as diesels are now more prevalent in the US I know this question will apply to many other readers. On a modern (eg. 5-10 year old) common-rail dial engine what engine/cleaning maintenance do you recommend beyond the usual service/filter items? Specifically, I’m thinking EGR, inlet manifold, turbocharger, intercooler/piping, throttle body… I realise it’s a toss-up between cost of work (employing a willing, competent local mechanic), savings in potential repairs & fuel efficiency, effectively the gross ROI. For example I’ve only ever done routine servicing on my 260k mile 1997 Audi A4 1.9 TDI and it’s always been totally reliable, only make expenditure was it’s first clutch at 225k at $300. I also have a 2008 VW Passat with the (now notorious) 2.0 common-rail engine on 173k miles, it has done almost all motorway miles (I didn’t buy privately, but tracked down the first owner) borne out by being on it’s original DPF (diesel particulate filter) with exceptionally low soot readings. So, in order of importance and including the items above, what is worth cleaning and how long would it each be likely to take? Also, I am not a big fan of pour-in products, for the same reasons you give in other articles, but how do you rate the Terraclean fuel cleaning machinery? Many thanks, Oliver