I'm guessing someone has built a fuel injector tester by now. I have an old Bosch mechanical injector tester and was thingking today about making work on electrical ones, problem is I don't know how much voltage/amperage they get. I doubt they get a full 12v, and I really don't want to ruin any trying to find out .HELP?

yes i built one, not very hard. one way is two build a 5 volt regulator on a switch, the hook it up to the injector, push the button to open the injector. if you are not sure how to build a 5 volt reg search on subtech on the internet they are a rc model sub ( as well as other remote stuff ) place that sells all sorts of electronics, they are currently being disturbuted by mikes sub works, look for the bec or some thing like that. it will supply one amp at five volts with a supply of 8 to 24 volts.

i built one and used it to open my injectors to pump cleaner through em, had the reg very hot to the touch by being open and drawing i think two amps for like 5 mins at a time. never even warmed the injector, but i think they run off of 3 to 4 volts in our cars

Injectors get about 1.5 volts from the FI, but I've fired them with 12 v without issue. Just add a couple of D cells to your plans to fire the injectors.

Mine opened with an 9v transistor raido batt.

What about pressurizing the incoming fuel? Is it even neccesary or can you just gravity feedit?

easy and safe way to get fuel or cleaner through it

buy a fuel bottle for a msr gas stove, there are desinged with gas in mind, drill a hole in the bottom and drop in a screw in tire vavle from the inside, put the nut on and tighten. then drill another hole and install another fitting of choice to hook a fuel line to ( can use another tire valve witht he valve removed ) then just put some gas or carb cleaner like i did in. put the cap on and put 20 lbs of air pressure in the bottle, they hold 100 psi with out a problem.

whats nice about this is you are only dealing with 3 to 30 ozs of fuel ( depending on bottle size and how muck you fill it ) and its completely electric less for spark reasons

Scott, that sounds like a damn fine idea. I have an old leaky pump mounted to mine, but your way seems much more manageable.

I use an old model railroad transformer to open mine. Has AC & DC. The knob will turn either way and voltage is adjustable depending on how much you turn the knob...

Works quite well for $3

....b

QUOTE (scott thacher @ Jan 23 2005, 09:38 AM)

easy and safe way to get fuel or cleaner through it buy a fuel bottle for a msr gas stove, there are desinged with gas in mind, drill a hole in the bottom and drop in a screw in tire vavle from the inside, put the nut on and tighten. then drill another hole and install another fitting of choice to hook a fuel line to ( can use another tire valve witht he valve removed ) then just put some gas or carb cleaner like i did in. put the cap on and put 20 lbs of air pressure in the bottle, they hold 100 psi with out a problem. whats nice about this is you are only dealing with 3 to 30 ozs of fuel ( depending on bottle size and how muck you fill it ) and its completely electric less for spark reasons

could you show a pic of your, or a pic of the bottle you are talking about....

rich

i can get a pic of what i built in a day or two, i dont have it some body else does but here is the bottle at rei.com this one is an 11 oz but IIRC correctly they make em up to 30 ozs

and here is a valve stem that would work a little pricey but it shows what a threeded valve stem looks like