MightyMouse

I recently attempted to install a set 305cc injectors (green top) into my stock 90 1.6 miata. No computer mods. The number 2 injector began to flood the engine. I replaced it with another and the same thing happened, yet when I went back to the stock injectors everything ran fine. My fpr was set to 45psi. When removed that 305cc injector I could physically push air straight through it with no resistance. So I tried attaching it to just the plug and it cycled fine and now I cant blow through it anymore. So I know that particular injector is working fine. What could have caused it to stay open?

olderguy

iTrader: (19)

Did you have the injectors cleaned and tested? Could be that in the working position a piece of crap is holding it open.

MightyMouse

Well the person I purchased them from said that they were tested and cleaned. However can the stock 1990 1.6 ECU work with the 305cc injectors? Or does it require ecu upgrades?

cardriverx

iTrader: (12)

They work fine, sounds like the injector is sticking.

Bryce

iTrader: (24)

My 92 idled those injectors with no problems at 14.7, cruising at stoich was another story.

Did the seller provide you with the papers of the cleaning - testing for proof?

Toddcod

iTrader: (8)

So with 305cc injectors run lean or run rich at cruising. Im going to probly run this same setup till I get an MS. Mine is a white 1990 as well with an FM kit.
So basically all I have to do is install 326cc injectors and it will still run. I have an MSD timing retard, If I set my timing to 10 I should run 9-10 psi with adjusting my fpr and watching my A/F. I should have a strong clutch that came with the turbo motor.
Any tips? Or extra?

cardriverx

iTrader: (12)

305cc injectors run rich at cruise, because they flow more fuel. With 326cc injectors, you might have to mess with the air flow meter's idle a/f mix for it to idel nicely.

Bryce

iTrader: (24)

My 305cc injectors ran around 12-13 AFRs while cruising until I leaned out cruise enough with Emanage that the stock NB sensor could keep them oscillating 14-15.

Toddcod what fpr are you running? I've got the begi afpr and couldn't keep from running pig rich (9s) on the bottom and top end without encountering a dangerous lean spot in the mid range. To fix this I use Emanage blue.

Edit: Cardriverx you frickin ninja!

Toddcod

iTrader: (8)

I have the same one as MightyMouse.. I haven't bought my injectors yet. Im going to U-pull it Tues. If they don't work good I can exchange. I have a set of RC 550cc injectors for when I get MS. I guess I need to do some more research and figure out how to adjust the a/f idle mix.
If there is no more abillity to boost with 326cc or worst highway mpg than I'll just buy the 305cc. What do you think?

cardriverx

iTrader: (12)

magnamx-5

iTrader: (7)

I would send the injectors to witch hunter and be confident you have a good product. Tod yes you need to do more resaerch it is dead simple i am sure when you open the thread and read abit you will see what we are talking about.