2nd Generation Specific 1986-1992 Discussion

Injector Air Bleed / Diffuser

Old 02-08-2006, 09:48 AM
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div
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So, since I have the UIM off to fix a fuel leak, I took a look at the injectors - as far as I know they've never been cleaned, so I'll be sending them off. Since I have an 88, they should have square purple tops with an offset slot - but i have red square centered ones. the part number is the same on the side as what i'm suppsoed to have tho. <shrug> they work, so I'm not too worried. What I am worried about is the air bleeds. most of the holes are sealed shut with a thick amber layer of... something. Should I try cleaning them (and what should I use), just buy new ones (mazdatrix says $40 each!!!), or can i just run without? I don't think they're doing any good currently and the car seems to run fine.



Pic of what I'm talking about:

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Old 02-08-2006, 12:35 PM
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I would at least try to clean them.
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Old 02-13-2006, 10:02 AM
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Handle them carefully. They are fragile.



Spray carb cleaner & paper towels should clean them.



(I suspect one of my secondarys is starting to leak also.)
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Old 02-13-2006, 11:19 AM
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Put new o-rings in everything once everything is cleaned, be careful with that carb cleaner, it is corrosive and can damage the air bleeders.



Buying the new set(s) of bleeders and o-rings wouldn't be a bad idea imo, yes it is kinda spendy but chances are your current ones will not survive the removal, cleaning and re-installation process.
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Old 02-13-2006, 11:39 AM
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div
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a can of carb cleaner later and they looked better. at least i could see through the holes. put everythign back together and the car runs great, so...
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Old 02-13-2006, 02:01 PM
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Originally Posted by div' post='801460' date='Feb 13 2006, 09:39 AM

a can of carb cleaner later and they looked better. at least i could see through the holes. put everythign back together and the car runs great, so...




Did you take em out first? Mine look as bad. I was wondering if I took them out and left them out what the effect would be?
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Old 02-13-2006, 03:13 PM
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div
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having heard and been told that you pretty much can't take them out without breaking them (unless you're really lucky) I left them in. Pulled the injectors and sprayed the air bleeds from both sides with carb cleaner. I ended up using almost a whole can on just the two in the UIM. Forgot to snap a pic of what they looked like when i was done - I'll try to remember when I pull it apart again to send the injectors off to be cleaned.



I don't know what the end result would be if you pulled them out and left them out. the injectors should do the job of atomizing the fuel by themselves.... I was hoping someone wiser than I would have some input the idea. I can't help but think that by placing something - even something with a grid of holes - in the path of the injectors like that all that would occur is the fuel droplets would build up and eventually start dripping off it in larger than ideal droplets. I suppose you'd have a similar problem if you removed it with build-up on the wall of the LIM opposite the injector, though.
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Old 02-13-2006, 04:38 PM
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the purple injectors are the 86-87.5 t2 low impedance jobbers
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Old 02-13-2006, 06:17 PM
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div
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So is the chart from Rotary Resurrection wrong?



Year type impedance plug style plug notch position flow rating color part number

84-85 13B NT low square center 680cc orange 195500-0900

86-87 13B NT low square center 460cc red 195500-1350

86-87 13B T low square center 550cc tan 195500-1370

88 13B NT high square offset 460cc purple 195500-1350

88 13b T high square offset 550cc purple 195500-1370

89-91 13B NT high oval center 460cc red 195500-2010

89-91 13B T high oval center 550cc purple 195500-2020


The part number on my 88 n/a is 195500-1350 and it's a red cap.
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Old 02-13-2006, 07:18 PM
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Was just scrolling through the forum and came by this thread. I have a REW engine that I just put 1600's in the secondary location. I tried to take the diffusers out so that I could clean them and they jsut broke.



I talked to a few people and it seemed to be a concencus that taking them out all together was ok. You can either use the diffusers and take the legs off or place a spacer between the injector and o-ring.



I don't know what the FC injector system looks like but 3rd gen guys tend to do it with their secondaries.



Also I will not likely check this thread again. If you need some more info send me a PM and I will come back and comment.



Hope this helps,

David
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