my 07 xkr has a bit of an irattic idle somtimes, rpm neddle jumps from 500 to 1000 rpm, running fine, bit of black carbon on tail pipes, recently serviced, new filters all round. Would fuel cleaner be worth a go. I never used it whats the recommended mix .

 

You didnt say how many miles, but then again, our cars are 7+ years old. An injector cleaner does work, so it is no harm, no foul if you use it and it does not fix the problem.

BG44 is considered one of the better out there.

 

+1 on bg44k

 

Highly unlikely that it's the fuel injectors given the symptoms, and all name brand fuels have more than enough cleaners already blended in, but give it a try.

 

I use a bottle Techron a couple of time a year in all my cars.

 

thanks all, 71,000 miles on clock, might give it a go, drives fine with no power issues,

 

Same here as I use it on all of our cars.

 

I've used two solutions
first I've used Seafoam - can be had from Autozone, sometimes Wal-mart, for @$7/bottle. People who let their cars or motorcycles sit for long periods seem to like this. When I add it directly into the vacuum system to be burned in the combustion chamber it creates one hell of a white smoke cloud. There are anecdotal rumors about bad things happening but none confirmed, as for how well it works, no noticeable difference but the same can be said for most tune-ups so who knows. It can also be put directly into your fuel tank or even the oil just prior to a change to help break up the clumos and such that sometimes remain.

Second - in my two cars I've pulled the injectors (very easy to do with little effort or knowledge, took maybe 20 mins), and used these guys
Fuel Injector Cleaning
They measure the current flow of each injector, chart everything for you, then clean and match each then get them back to you very quickly. As I remember the costs were very minimal. Cars ran smoother and slightly better mileage afterwards to nothing but good things to say about them. No affiliation just a happy customer

 

Be aware that the massive clouds of smoke it creates is simply the Seafoam itself burning off and not the result of removed 'engine deposits'. This product is very effective for it's original purpose of unclogging the carbs on WWII vintage 2 stroke outboard engines but it contains no ingredient that will do anything for a modern engine. Instead of spending $7 a bottle, make your own identical product at home for about 1/10the cost. Seafoam is a mixture of naptha, denatured alcohol and light oil. That's it, no miracles.

 

Will moth ***** (naptha), rubbing alcohol, veggie oil, sesame oil, or peanut oil work?

Looks cheap to me, and I like that idea.

 

Make lots of acrid or toxic smoke? Probably.

 

I use on my high mileage BMW but not my jag... speaking of that thing... i need to drop it off at the shop

 

Chevron with Techron every ~3000K in all cars for past 25yrs. Never had a single injector issue.

 

I've never used any additive in any car or bike or boat in over 40 years and never had an injector or carb problem. It's pretty hard to prove that a products works if it's unlikely that there would have been a problem in the first place.

 

I used Seafoam to clean the valves and intake when I did the service on my Ducati last summer. I'm not sure how well it works when you poor it in the tank but, it certainly helped remove the deposits when I let the valves soak in it for a while.

 

Tecthron # 1

Merccrusier top end cleaner through air intake large white smoke. Started using it to clean rifle barrels. It will dissolve plastic be careful

 

Hi,
I would, first check for codes relative to coil-over igniters, then plugs. Pull and read each plug look for differences, not only at the tip area, but where the fire ring is on each. You may need a magnifying glass for this.
Good Luck...