------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

quote Originally posted by DanMFiero88: I pulled it - and this is what it looks like. The screens are nasty. They look similar to the old fuel strainer in the gas tank. Looks like the bottom screens are the worst. How hard is it to clean these, or is a new injector the better way to go?

New ones cost $65 to $130 or more for ACDelco and often not first thing to replace. Could get "Remanufactured" but has a core charge and pay shipping 1 or both ways depending on vendor.

See my Cave, 700 TBI

While this Multec injector is hard to kill...

If a Noid light sees ECM "signal" making it to blink but injector nothing then the Injector maybe stuck/plugged from crap fuel. (ECM is on "Ground side" of injector.)
Spray cleaner into the injector side ports and bottom. Wait a bit. Repeat.
Or get some fresh gas and let the injector soak a bit. Use a "shot glass" or other small container so gas only hit the side ports and bottom.

Think Gumout made EFI cleaner spray safer then nearly all Carb Cleaner for TBI cleaning but seems no longer. might still find at some stores.
(Safer for TBI and other EFI parts not you.)
Not sure if Gumout Regane Parts Cleaner/Degreaser replaces that.

Screens are Very fine. Bottom screen can look "warped" in the plastic even when new... But may have a film of crap might wash away w/ fresh gas. Don't scrub them.
example of new unit:


TBI rebuild kits may have new injector screens. (Some only the bottom screen.) Also the regulator part that likes to leak. when you have that leak, may not be very obvious unless air cleaner is open or off when engine runs. Some brands seem to sell same kit as same 1 pic is shown by them.

Hard to see injector output in the car but Drops from injector bottom = o-ring bad etc. and often still drips w/o starting as pump primes.

Contrary to common Myth... Many Main Fuel Filters including Fiero ones often doesn't block small stuff the injector screens can. Worse this has ~ 3 feet of supply line between main filter and TBI that can shed bigger crap w/o warning.
The screens are Final Filters that block All Trash > screen size getting in the injector.
But unlike the main filter, the screens won't show most trash because extra fuel carries that away thru the regulator and return line. Same for most others w/ return flow.

[This message has been edited by theogre (edited 11-03-2021).]