Stock B3 Fuel Injector Flow Rating?

[sketchman]

I've searched, and I've not found.

The FoMoCo part number RockAuto gives cross refs with a Bosch model that says 31lb on witchhunter's site. That seems ridiculously huge and wrong. A different one shows up for the Aspire on RA, and I find nothing about it so far. I've used Festy units in an Aspire before and they worked fine, but I can't find a spec on them.

Found the following thread which shows lots of options, but not the stock numbers.

http://www.fordfestiva.com/forums/showthread.php?2973-B-Series-Interchange-Build-Bible&highlight=326cc+injectors+stock

Anybody?

[gergorian]

I had Matt clean and flow match my stock injectors and I want to say the flow was around 20lbs. I have the card at home and I'll update with the actual numbers for you.

[sketchman]

That would be awesome. Thanks.

I just looked over a digiFSM I have, and it says fuel pressure should be 25-31 psi at idle. So I went to witchhunter's site and adjusted from the normal 43.5 rated pressure to 25 and get 23.5 effective. If they really are 31lb injectors I may stick some disc style 30s in and lower the pressure to fix the rich issue Matt mentioned, and still be fine when I get ready for boost.

[bhazard]

Re: Stock B3 Fuel Injector Flow Rating?

You're mixing up injector flow rate and rail pressure.

[rmoltis]

My aspire shop manual says the fuel rail pressure should be between 30-38psi controlled via the fpr.

[gergorian]

You're mixing up injector flow rate and rail pressure.

After reading it again it looks like it. I believe that nominal fuel for pressure in the Festiva is about 40 psi.

[gergorian]

Boy, was I off on the flow rates.... I just got home and grabbed the card that Matt sent with my injectors and the flow rate of all of the injectors is 11.2 Lbs/hr. Yeah, alot less than I thought it said earlier, sorry about that. :/

[blkfordsedan]

Stock 4.6L 2V injectors are 19 Lbs/hr.....not sure what pressure that's at. So, I guess that really has no value to this discussion. LOL.

[gergorian]

The 4.6L runs anywhere from 35-45 PSI depending on application and year. It is somewhat relevant but not very much.

[Movin]

I've searched, and I've not found.

The FoMoCo part number RockAuto gives cross refs with a Bosch model that says 31lb on witchhunter's site. That seems ridiculously huge and wrong. A different one shows up for the Aspire on RA, and I find nothing about it so far. I've used Festy units in an Aspire before and they worked fine, but I can't find a spec on them.

Found the following thread which shows lots of options, but not the stock numbers.

http://www.fordfestiva.com/forums/showthread.php?2973-B-Series-Interchange-Build-Bible&highlight=326cc+injectors+stock

Anybody?

search using "injector color" came up with this, I don't know much about non stock use of injectors, but stock festiva injectors are the ones at 19 lbs or 22 lbs. I own both.

15lbs = Gray top injectors

19lbs = Yellow (or sometimes referenced as Orange) top injectors

19lbs = Solid Orange "skinny" injectors

21lbs = Solid Light Purple "skinny" injectors

22lbs = Violet top injectors

22.5lbs = Blue & Black top w/ Silver body injectors

24lbs = Sky Blue top injectors

25lbs = Solid Black "skinny" injectors

25lbs = Solid Light Blue "skinny" injectors (Ford Navigator)

27lbs = Solid Light Gray "skinny" injectors

30lbs = Red top injectors

36lbs = Brown top injectors (low impedence, used in the 4 cyl Turbo vehicles)

36lbs = Dark Blue (Colbalt Blue) top injectors

36lbs = Solid White "skinny" w/ rectangular connector injectors

39lbs = Solid Blue "skinny" injectors (Blue Giant) (Ford rates this at 39lbs, flow rate is actually 42lbs)

42lbs = Lime Green top injectors

42lbs = Solid Green "skinny" injectors

48lbs = Beige top injectors (found on 85 CFI 5.0's)

50lbs = Gray top injectors

55lbs = Black w/ Gray top injectors

65lbs = Purple top injectors

160lbs (1600cc) = White top injectors w/ black body

[sketchman]

You're mixing up injector flow rate and rail pressure.

Nope, I'll grab a snapshot of the FSM page.

Thanks, Movin and Gergorian.

Here we go. Specs as of 91. (KOER = Key on Engine Running KOEO = Key on Engine off)

[Movin]

Looks like the Mazda built stuff has a lot of pressure change between KOEO and KOER compared to domestic systems. Just how important is that thing on the firewall that controls regulator vacuum?

[crazyrog17]

Stock B3 Fuel Injector Flow Rating?

That thing on the fire wall is a solenoid to capture fuel fumes from the carbon can. Carbon can is fed by the vent line from the fuel tank.

[Movin]

That thing on the fire wall is a solenoid to capture fuel fumes from the carbon can. Carbon can is fed by the vent line from the fuel tank.

I have code 25, not code 26. Quite possible it is related to the above information!