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injector coil windings overheated from cooling system failure or ignition failure, with windings losing their magnetic performance; open (broken) windings; shorted (grounded) windings; seized pintle from internal injector corrosion
Hey guys I'm thinking one of my injectors is sticking open leading to a flooded condition on a cold start. What is the best way to clean them? Also what's my best bet for determining if one or more is bad?
I'm bumping this for this info Team posted, I must have missed it amongst the banter. The first post needs to be modified because the info is not accurate. I have found the same info as Team when searching and from what I have seen used injectors flow at, the yellows flow quite a bit more than listed in the first post. For our application we should be looking at what they flow at 4 Bar (roughly 58psi where the RX-8 operates).
This is what I have found from a couple of sources that use these Denso 195500-4450 injectors in Turbo Miatas, Toyotas, and some other platforms.
They are officially listed by Denso at 425cc @3bar/43.5psi
This is very important if you are tuning using Cobb's formula for determining your injector bank sizes. I have heard and read a few different numbers in terms of what the flow rates are of different stock injectors. I have also found that if you get injectors cleaned and tested, make sure you know the method they are using to do it because how they do effects the numbers. Most I have seen don't test them at 60psi.
Originally Posted by TeamRX8
more accurate data for the yellow P2/Secondary injectors:
Number one tip, take digital pictures and mark the leads before removal.
I hope this is correct, please feel free to correct any errors....
Fuel Rail 1 (two injectors)
Both leads for this fuel rail come off of the main harness together.
Front rotor injector wire color is light-green and red. (Front Primary 1) Front injector Wire lead has White colored tape
Rear rotor injector wire color is light-green and black. (Rear Primary 1) Rear injector Wire lead has Tan colored tape.
Fuel Rail 2 (four injectors)
The two center (the middle) injector wires come off the harness together and split. Front side of the middle split has Yellow colored tape. Rear side of the middle split has Green colored tape. The two end (front and rear) injector wires come off the harness separately and have no colored tape.
The front injector wire is Green and Red. (Front Secondary)
The front rotor middle injector wire is Black and Blue. (Front Primary 2)
The rear rotor middle injector wire is White and Green. (Rear Primary 2)
The rear injector wire is Black and Blue. (Rear Secondary)
this here is correct. i was going by what sarx posted up but some of my wires didnt match.
Yeah it varies, there really is no rhyme or reason to why some are different. We just did an 05' not too long ago that matched that ^ exactly. But some the wires on another harness we have on hand was different. Everything is properly labeled now when we do it, it's not worth the hassle.
Yeah it varies, there really is no rhyme or reason to why some are different. We just did an 05' not too long ago that matched that ^ exactly. But some the wires on another harness we have on hand was different. Everything is properly labeled now when we do it, it's not worth the hassle.
i had to change the whole wiring harness on my car cause the wiring on the donor engine i put in it was no good. kind of wish the dude who sold me the engine would have told me so i would have done the wire swap when the engine was out. finally got it running like a champ today.
I just got these in for a friends low mount turbo build, we are going to have them tested locally to insure they flow 1000cc and then he will decide if he wants to run them.
I run custom yellows (555 cc/min at 4.0 bar) in the secondaries that I purchased from them a while back. But I will go with ID's when I got top mount and Adaptronic.
Does anyone know when the injectors are supposed to "come online", in terms of RPM and load? for example, when troubleshooting injector issues with an oscilloscope according to mazda FSM, it states that primaries (FP1/RP1) will be on at idle, secondaries (FS/RS) can be observed above 5,000 when racing the engine, and the second pair of primaries (FP2/RP2) can be observed above 6,250 when racing the engine.
Your VFAD opens at 5500, it is likely due to that. But usually it leans out when the various intake valves open, not richen up. But I have not had a stock intake in years so who knows.
Last edited by 9krpmrx8; May 13, 2016 at 01:39 PM.
I have red and blue injectors on my stock engine. I am having high rpm hesitation. Could this be due to over fuelling? I suspect that the blue injectors could be overwhelming the spark and causing the engine to loose power. This happens at around 7000rpm.
My next step is to install the yellow injectors to see if the problem gets resolved
Could you tell me, what is the injectors flow of a 2010 RX8 R3? I know there are 4 injectors, 2 green and 2 dark red by cons I found nothing about their flow.
Do you Think that they are enough for a conversion E85 (Ethanol)
