New fuel injector O-rings came included among the others with my head gasket set for my 92 Accord, so i went ahead and replaced those O rings. I thought especially since I already have the injectors out it would be a good opportunity to clean them. Not that I necessarily have reason to suspect they particularly need it, although they might, and why not if I could? There's various different do-it-yourself methods of cleaning injectors on video at YouTube, most of which involve applying electrical power (usually via a AA or AAA battery and/or with use of a transformer, etc) to the electrical plug connection of the injector while spraying injector cleaning fluid under pressure into the injector. These methods can also apparently indicate whether the injectors might have faulty operation such as not closing properly or leaking. (You can see plenty of such videos by going to YouTube and typing in "clean fuel injectors") However, my Honda repair manual states the following: "Bench testing of the injectors can only be done using expensive equipment. Generally this equipment can be found at a dealership and sometimes at a well-equipped machine or performance shop. There is no provision for field testing the injectors by the owner/mechanic. DO NOT attempt to test the injector by removing it from the engine and making it spray into a jar. Never attempt to check a removed injector by hooking it directly to the battery. The injector runs on a lower voltage and the 12 volts from the battery will destroy it internally." So my question is: If I did happen to be able to find out and then apply the correct amount of voltage to the injector(s) while removed from the engine, could I still go ahead and try one of those DIY injector cleaning methods and have it work out just fine, "spray into a jar" anyway despite the clear instruction not to do so in the manual? Any comments appreciated.

Hi, I have a 99 Toyota that blown a freeze plug going down the road. I replaced the freeeplug and car still was overheating. And hose on top was all vacuumed in suction. I replaced hose thinking it was weak.still got hot. I took out thermostat and car ran good in a test run and did not overheat, without thermostat. I replaced the thermostat with a new one, and now car overheating again, right away. There is no oil in the water. I don't know what to do next. Any suggestions would be grand... thanks