I asked the stealership what two chemicals, in what state, cleaned carbon off...crickets chirping. (acetone/liquid, and water/steam) Then I asked how they clean the injectors without removing them and using an ultrasonic cleaner. That one they knew! They DON'T! They just call it an injector clean and charge you over $100. Their clean is to run $2. worth of carb cleaner through the brake booster vacuum line into the intake, and add $2. worth of carb cleaner to the gas tank!
Here's what I did- removed the intake tube off the front of the intake, exposing the butterfly. I braced the butterfly open with a rag and sprayed the butterfly and surrounding metal clean. The rag absorbed the run off. Then I held the butterfly open with my finger and sprayed the waffle pattern metal grate behind the butterfly. I would spray, wait a couple minutes for the cleaner to work, repeat. Spray cleaner is $1. a can at the dollar store. All solvent, no chlorine or weird stuff. Used a whole can.
Waited 30 minutes for evaporation, started the engine, brought to operating temperature, stabilized, shut down.
Next, took 5ft of 1/4" clear plastic tubing. Drilled matching hole in 16 ounce bottle top of wally's fingernail polish remover acetone. Drilled additional 1/16" hole in top for a vent. Mixed 1/2 can of Berrymans B12 chemtool with 4 ounces of acetone in the see through acetone bottle.
Removed the vacuum line from the brake booster, at the brake booster. Inserted clear 1/4" tube into the vacuum line running to the intake, push in 2" for a vacuum tight fit. Inserted the other end in the hole in the acetone bottle cap, pushed it down till it was just off the bottom. Got in car holding acetone bottle. Folded (pinched) plastic tube to close it off while I started the engine for starting vacuum.
Stabilized rpm at 3000, (recommended stabile 2000 rpm, not possible) released finger pressure on clear plastic line enough for vacuum to suck fluid in watching flow to make sure liquid was aerating on bottle exit. 2 minutes- bottle empty, shut off engine.
Wait 5 minutes for chemical cleaning action. Reconnect brake booster vacuum line. Go drive- at 60 mph mileage went from 17 to 19. Ten minute drive, returned home.
Repeated procedure. Was able to stabilize at 2000 rpm second application time. On 60 mph mileage check (Scan gauge) mileage up from 19 to 22.
Quit while I was ahead. Total cost- Wallys acetone $2.50 a pint. Wallys Berrymans B-12 Chem tool- $3.00 special- total $5.50 plus $2. for plastic tubing. Savings- $70 at real automotive shop. $125. At stealership.
