Thoughts on Injector Cleaner?

[hausmeister]

Not sure how much cleaners do. PEA is mostly used/recommended for direct injection.
Probably good as a precaution, but not sure if it can fix a real problem.

I disagree on dirty or gummed up injectors causing a code... as long as they put in enough fuel and it ignites it wont. You can take out injectors and test /clean them. Spray pattern could be really bad, amount might be incorrect. In my opinion it is best to get some refurbed or new injectors for cars that old (or at least clean and test them). The ones in my 850 were really bad. Car still ran though, no way to tell.
I wouldn't expect any cleaner to fully clean 30 year old injectors that are in the car... for prevention, sure, why not. Once a year or something.

[matthew1]

Grocery store yesterday, made me think of this thread:

IMG_1620.jpeg (365.15 KiB) Viewed 183 times

[Cees Klumper]

About 10 years ago I tested out the usefulness, or lack thereof, of injector cleaners. Bought a generic brand cleaner in our French grocery store and tried it out on both our first gen high-mileage S80 and C70. To my surprise, both cars' fuel economy materially improved - and wasn't bad to begin with. As in, about 5-7% improved, long-term. Since then I am converted and run a bottle (usually Techron) through all my cars and motorcycles once a year.

[abscate]

Not sure how much cleaners do. PEA is mostly used/recommended for direct injection.
Probably good as a precaution, but not sure if it can fix a real problem.

I disagree on dirty or gummed up injectors causing a code... as long as they put in enough fuel and it ignites it wont. You can take out injectors and test /clean them. Spray pattern could be really bad, amount might be incorrect. In my opinion it is best to get some refurbed or new injectors for cars that old (or at least clean and test them). The ones in my 850 were really bad. Car still ran though, no way to tell.
I wouldn't expect any cleaner to fully clean 30 year old injectors that are in the car... for prevention, sure, why not. Once a year or something.

The fuel management systems on these cars are closed loop on total oxygen in the exhaust, so if one injector is weak that cylinder will run lean and extra gas will be put into the others. You only get about 10%adjustment before a code, though

[hausmeister]

Ok, makes sense. Depends on how bad they are then

[volvolugnut]

I had read years ago that Techron was the best cleaner. If I use any cleaner, Techron is the one.
volvolugnut