Liqui Moly Petrol Engine Intake Decarb 2733

The instructions say to spray the cleaner for 2-3 minutes with the engine 'off'. Be careful as the cleaner spray can condense to liquid and could mostly flow into one cylinder. The liquid filled cylinder can then block the engine from turning over when trying to start. If this happens, remove all the spark plugs, breifly switch the starter 'on', the motor should then turn over and blow the liquid out of the sparkplug holes. Put the sparkplugs back in, start it up, and do the second stage spray cleaning. Does a good clean anyway (may be a good opportunity to also clean the sparkplugs with a wire brush and electronic cleaner spray, check gaps ect).If you have an engine with high compression ratio and/or small cylinder volumes (eg 1.6L/4cyl; 2.4L/6cyl; 3.2L/V8 etc), ... MoreThe instructions say to spray the cleaner for 2-3 minutes with the engine 'off'. Be careful as the cleaner spray can condense to liquid and could mostly flow into one cylinder. The liquid filled cylinder can then block the engine from turning over when trying to start. If this happens, remove all the spark plugs, breifly switch the starter 'on', the motor should then turn over and blow the liquid out of the sparkplug holes. Put the sparkplugs back in, start it up, and do the second stage spray cleaning. Does a good clean anyway (may be a good opportunity to also clean the sparkplugs with a wire brush and electronic cleaner spray, check gaps ect).If you have an engine with high compression ratio and/or small cylinder volumes (eg 1.6L/4cyl; 2.4L/6cyl; 3.2L/V8 etc), just do a short duration first stage spray.

I deviated from the directions on the bottle slightly. Basically with the engine idling, fed the contents in through the fuel pressure regulator vacuum hose to the point of stopping the engine then back off and repeat until tin was empty and left car sit for 2 hours (overnight would be great) Fired up engine, it was hard to start and smoked for a few seconds. Took it for a sprited drive, plenty of soot for the first minute or so. Change engine oil and filter after test run.Results: 1. Plenty of black carbon muck on the exhaust tips2. Car starts a lot easier especially when cold3. Idle quality improved4. Engine is happier overall

Used this product on my 01 Magna.Car had bad fuel economy and a pretty rough idle.Followed instructions to the tee but found that during the first stage all of the spray condensed in cylinder 3 and locked up. Took spark plug out and cranked and wow!! You can really see how much crud builds up in and engine. Took all 6 plugs out ( was changing them anyway) sprayed a short burst in every cylinder and let so for 10 mins then cranked over. Then continued with following the instructions and wow there was a lot of rubbish that came out.Put all back together changed oil and filter and the car is running 5x better. Highly recommended just be careful not to hydrolock you engine.