Direct Injection Proves Fuel Additives Don’t Work – ETCG1
Recently I picked up a 2007 Mini Cooper S (R56) with direct injection. While doing other work on the engine, I decided to remove the intake to have a look at the intake valves. I found exactly what I expected, the valves were covered with performance robbing gunk.
I spent some time cleaning things up and it looks good as new now, but I have a feeling that one day this issue will come back again.
Why did this happen? 2 reasons. The first is direct injection. No fuel will ever make it to the back of the intake valve to clean it. Second, the N14 engine has a horrible PCV system. This means that the intake manifold is getting a constant supply of oily gunk that will eventually coat the intake valves again.
This is the foundation for my argument. If this car had a traditional injection system, the problem probably wouldn’t be so bad.
I have other theories and explanations in the video. Please watch it, rate it kindly, and subscribe.
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Thanks for watching!
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Discussion about this video: https://www.ericthecarguy.com/kunena/17-ETCG1-Video-Discussions/70311-direct-injection-proves-fuel-additives-don-t-work
My OTC Fuel Injector Cleaner: https://www.jbtoolsales.com/otc-tools-7448a-fuel-injection-cleaner-canister#oid=1002_1
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Video Title: Direct Injection Proves Fuel Additives Don’t Work -ETCG1 Video Description: Recently I picked up a 2007 Mini Cooper S (R56) with direct injection. While doing other work on the engine, I decided to remove the intake to have a look at the intake valves. I found exactly what I expected, the valves were covered with performance robbing gunk.Thumbnail: http://www.ericthecarguy.com/images/Youtube_Thumbs/may/2018/Direct-Injection-Proves-Fuel-Additives-Dont-Work.jpg
