DIY injector rebuilding?

I suspect I have a leaking injector.  New ones are cheap, but not super cheap.  $25 each, or I can get dubious chinesium injectors off Amazon for $75 for a set of 6 with no reviews.

Without a flow bench/tester, is it something I should try myself?

I would caution not at all. Why replace all of em why not just do a balance test?

Use compressed air

Spray carb cleaner

and a 9v battery to energize the injector.

The inlet screens often get plugged.

A leaker usually has some goober stuck in the valve, energizing the injector and blasting it with air will usually dislodge debris.

I am a big fan of sending the injectors out to the Injector Shop and having them flow tested.

I usually buy matched sets of injectors from an injector shop.

You can't rebuild injectors only clean them and back flush and flow test.

You could rebuild injectors, but without flow testing its a waste of time to know if you've made any improvement or where the issue is.  

Professional injector rebuild shops have the tools to dissassemble some injectors and replace the internal filters if possible, it's worth the cash to send them out unless you think it will become a regular thing.  Most shops charge about $10/injector to flow test and clean.

Then if they find one is bad, just replace the one!

I haven't found any local injector rebuilders, but I could send them somewhere.  Injector shop charges $50 for clean and flow test, but I can't get a solid answer what it costs to replace damaged components (if any)

This is on a COVID layoff budget.  Just dropped $500 in parts to get this jalopy running right.  The good news is that it's a 94 Ford Ranger, so that $500 buys a TON of parts.  Radiator, belt, clutch kit, flywheel, RMS, slave and master, heater core, intake boot, valve cover gaskets, intake manifold gaskets.  Trying not to spend another $150 on injectors if I can do them at home.

Maybe I'll clean them up like bentwrench suggests.  This is one of those brilliant designs where the fuel rail is held on by being sandwiched between the upper plenum and lower intake, so I'd rather not do it twice.

I sent mine to a seller on ebay that cleaned, flowed, put in new screens and orings for $11 per. 

In reply to Curtis73 (Forum Supporter) :

Marren injection is open during this pandemic.  I believe they sponsor the board as well.  

I've had great luck with there services.

Ditto on Marren if you are paying money.

Most of the amazon/ebay cheapies are garbage and should be avoided at all costs. 

I would think that Ranger injectors are really cheap used. That would be my answer, being budget minded. You are bound to have 4 good out of your set now and another 4.

Ive cleaned TBI injectors in an ultrasonic cleaner filled with rubbing alcohol, but that was a last resort attempt, and they are easy to find replacements at the junkyard.  Not sure if more modern injectors would be cleanable in the same way.  I’ve seen some videos similar to what bentwrench suggested on YouTube.

When I did mine, all I did was change the mesh filters, pintle caps, and O rings. I forget where I bought the parts. eBay I think. I don't trust what I did made a big difference, next time I'd use a pro like Marren.

Looks like Marren would charge $10 more per injector to clean and test than I can buy brand new at the Ford parts counter.