A little background on the symptoms and issues that led up to this post:

At the last event in November at Summit Point I was having some fueling issues where the car would start running a little lean through the meat of the VTC ramp in and in the upper RPMs. At the track I pulled the pump sock and the inline filter to diagnose the issue. Sure enough the filter and the sock were pretty well clogged with tank debris. I cleaned the sock and filter which helped but it still wasnt feeling 100%.. both response and power were still down a bit.
The main reason (I believe) is because I switched over to E85 and it scoured all of the contaminants out of the fuel system (especially with the track time, fuel was sloshed around etc...). The filter was crushed a bit letting unfiltered fuel through to the injectors causing them to partially clog and causing my intermittent break-up and lack of power.

The injectors are DeatschWerks Bosch EV14 1500cc injectors that do not have a serviceable screen. This is the best method I have found to clean an injector like the EV14s.

First you want to pick up this Universal DIY injector kit from Amazon ($15):

Amazon

Amazon

Grab a 12v source (a car battery works good)

One can per injector of the strongest non-flammable brake cleaner that you can find.

Now that you have your materials, take your injector and insert it into the plastic unit that comes with the kit that fits your injector. In this case I am inserting it backward because I need to back-flush the injector to dislodge the debris.

Pop the spray nozzle off of the brake cleaner so that you only have the stem on top of the can.

1. Plug your injector into the alligator clip (dont hook it up yet)

2. Get a catch bin for your brake clean ready

3. Hook up the negative on the 12v source and insert your brake clean stem into the plastic unit, connect the positive terminal, you will hear the injector click open.

4. Push down on the can and spray about 1/5th of the can through the injector, stop and then remove the 12V positive. Tap the 12v positive on the terminal a few times to actuate the injector and loosen any debris.

5. Now mount the injector the normal way and repeat step 4... watch the pattern of spray, it should be uniform throughout the pattern once it is clean.

6. Insert the injector backwards again and repeat step 4, then repeat step 5. Do this until you run a can through each injector and you are done.

This may not be as good as a sonic cleaning that the pros use but it fixed my issues 100%, the car rips good as new, and I am in it for about 10$ per cleaning.

Note: Do not leave the 12v hooked up with the injector open for extended periods of time, you run the risk of overheating the coils. Do about a 1/5th of a can at a time and then remove the power source (mine got a little warm but you don't want them getting hot).


Parts used

EV14 1500cc injector

Non-serviceable

Assembled

All finished!

Hopefully this will help some folks that need an injector cleaning in a pinch!

 

I’ll drop mine off next weekend ... great write up and description. Being able to service them your self and only sending them out to blue print once in a while is a great benefit... considering how long our cars sit

 

Thanks =-) I figured it should be a good stop gap if folks need their injectors cleaned and dont have time to wait for the shipping and turn around times. Bring them by, we can run a few cans through them

 

Nice. I used a vacuum tube filled with acetone, hooked the tube up to an old air compressor for car tires, then got a 9V power supply and some wires and connected the power supply to the injector. Push the button to turn the compressor on and the solenoid does its thing letting the solvent thru.

BTW you might want to replace you filter and sock a second time. Fuel systems that plug up filters and socks usually do so more than once-- my experience is based on a Northeast H2 car I help maintain.

And yeah it's common for ethanol to be a more aggressive solvent in fuel systems than gas. Also can attack certain rubbers AFAIK.

 

That way would do the trick as well =-)

Yeah haha I replaced the sock 2x now and the crushed stainless filter I have replaced as well (it was torn). It was my fault for not checking it more regularly and not anticipating the amount of crap that would be loosened up by the eth. I have used a supposed eth safe hose from the pump to the lid bung.. so far so good with that.

 

awesome info!