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Now that we've figured out that USDMs aren't really 550's, what is a good source for larger, quality injectors?

I run a Vibraint Ultra Quiet resonator & a MagnaFlow muffler. Quiet with a great tone, I love it...

LOL, me too. Sure did spool quicker though :biglaugh:

AFR can't be diagnosed across the internet, nor can one engines mods be compared to another similar motor. Guess if you wish, just carry a bucket to pick up the pieces. Good day.

I agree. I bought one off of ebay only to have to buy another one form driftmotion because the fit of the original was so bad. Stick to the known vendors....

cut your gain back.....

Never mind, I don't give a shit. Roll the dice if you wish.....

What does your wideband say your afr is? That's the only way to know IMO

Changed alternators, good voltage, same problem. But..... After many minutes on the phone with Aaron (thanks again Aaron), we think we have it figured out. My ecu gets it's o2 reading from my LC-1 wideband. The wideband isn't calibrated, therefor it's sending the ecu the wrong AFR. We...

Sheesh....SEARCH for this info, it's been documented thousands of times already......

Well the 'USDMs' that I bought fell way short of 550cc, so there must be some truth to that....

I bought a set of 550's, or at least they were supposed to be 550's, for my ride. Aaron had them cleaned & flowed, only to find out that they only flowed 450cc IIRC. I've heard more than one person mention that USDM 2J injectors aren't 550's, but more like 460cc's. Is there any truth to this...

It will be, sign me up for the dyno please....

I heard that they leak coolant if the glass isn't prep'd right :-)

Hey Jay, too many pages to search through, so tell me what your running for engine / fuel management....

It's starting to look like my problems are caused by my newly installed, freshly rebuilt alternator. :icon_conf I checked it today and it's only putting out 12.02v at idle & just a tad more at 3k rpm. I'm swapping it out again this weekend & see what happens....

Don't cut the bumper, you could be in some serious shit if you rearend some one. 12"x24"x4" installed without having to cut my bumper. The hood latch support has to be modded, but not the bumper....

Me too. Not a pressing task or anything, but I want to build up on over the next year or two & wait for something to break so I can have an excuse to drop it in....

I'll try disconnecting the battery, because I'm still getting a code 21 after putting a 1k resistor between my wideband & the ecu. My A/F is perfect now instead of it jumping around like it had, so I'm fairly certain that it shouldn't throw a code now.....

I have pulled the EFI fuse several times, yet the codes won't clear, any thoughts as to why?