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Fuel Injector Colors

35429 Views 36 Replies 21 Participants Last post by  dinoramos273
Can someone please tell me meaning in lb of all the fuel injector colors, i have pink ones on my 02 GT. How many lb are the pink fuel injectors?
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my 99 came with 19#(9f953) but the 01+(romeo) came with 21# which were pink in color I believe. don't remember the color of my 19# but they were not pink
Read much? :D
Jayc here's a site that has flow tested the pinks and they also say they are 21's.
Ford 14# 19# 21# 24# 30# injector service
check it out.
Jayc here's a site that has flow tested the pinks and they also say they are 21's.
Ford 14# 19# 21# 24# 30# injector service
check it out.
From what I understand there are 21# injectors , but only 19's were used in the GT's . Some are yellow/orange and the later models were pinkish. I have to go with what Jerry says.
That's fine niether of us have flow numbers so to be 100% sure we'd have to get an orange and pink one and get them flowed.
That's fine niether of us have flow numbers so to be 100% sure we'd have to get an orange and pink one and get them flowed.
True, Jerry is just the best resource I have. :D
I have pink injectors on my 03 GT and can anyone explain to me how come when I connect a scanner it says Im running 42lbs of fuel pressure. The car is bone stock with an auto trans. Went to the track and slapped on Toyo Proxes RA1's tires in the rear and ran a 13.9. To my knowledge the car is bone stock, smooth idle, stock heads, stock pullies, stock intake and sotck exhaust. On the highway I cruise at 65mph and the rpms are just above 1500. If I am not mistaken I have 3.27 gears. The car has 53K and on the dyno it reads 258 rwhp and 300 torque.
I have pink injectors on my 03 GT and can anyone explain to me how come when I connect a scanner it says Im running 42lbs of fuel pressure. The car is bone stock with an auto trans. Went to the track and slapped on Toyo Proxes RA1's tires in the rear and ran a 13.9. To my knowledge the car is bone stock, smooth idle, stock heads, stock pullies, stock intake and sotck exhaust. On the highway I cruise at 65mph and the rpms are just above 1500. If I am not mistaken I have 3.27 gears. The car has 53K and on the dyno it reads 258 rwhp and 300 torque.
factory freak :dunno
3
The pink (lavender) injectors are 21 lb/h, they were used in the 2V engines from late 2002 through 2004.



They are Bosch 0-280-150-561 as shown above, rated for 22.0 lb/h at 3 bar (43.5 psi).

from Stan Weiss' site: (click here)


However because Ford operates them at 40 psi that rating is downgraded according to this formula:



sqrt(40 psi/43.5 psi) * 22.0 lb/h = 21.1 lb/h

In 1999 reviewers and owners found that production Cobra's were not producing the claimed 320 fwHP, some reportedly down by as much as 30 HP. They halted 1999 MY production and there was no 2000 MY Cobra in the US.

This was a real "black-eye" for Ford and they began a lengthy review of the HP claims for all engines. In this review it was found that the 19 lb/h injectors in the 2V engine (same as used with the 225 fwHP non-PI engines) were only marginally capable of supporting the PI engine's claimed 260 fwHP. The 21 lb/h injectors were quietly introduced into the late 2002 MY production.
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I have pink injectors on my 03 GT and can anyone explain to me how come when I connect a scanner it says Im running 42lbs of fuel pressure. The car is bone stock with an auto trans. Went to the track and slapped on Toyo Proxes RA1's tires in the rear and ran a 13.9. To my knowledge the car is bone stock, smooth idle, stock heads, stock pullies, stock intake and sotck exhaust. On the highway I cruise at 65mph and the rpms are just above 1500. If I am not mistaken I have 3.27 gears. The car has 53K and on the dyno it reads 258 rwhp and 300 torque.
The car is a complete anomaly if it is a bone stock auto and putting 258/300 to the wheels, they typically put down 220 or less on a DynoJet inertial dynamometer. Did you record AFR during the dyno run? If it was as it should be (12.5 to 13.0:1) then it must at least have a tune as the late '02 through '04 GTs with the pink injectors run PIG rich at high loads and WOT.

The returnless fuel system aims for a 40 psi (or 53 if the fuel is hot) pressure differential across the injectors, from the rail to the nozzle tip (in the manifold). The fuel pressure PID (Parameter ID) read by OBD2 scanners represents what the PCM thinks the differential pressure across the injectors is, however it is not THAT accurate. It doesn't need to be because of the adaptive learning capability (short and long term fuel trims)--the allowable range is 39 to 43 psi.

If you were to read the real pressure at the fuel rail, at idle, you would find it to be 9 or 10 psi less than the PID value, as at idle the manifold vacuum is 18 to 21 inHg or 8.8 to 9.9 psi (negative psi as it is a vacuum). The 29 to 33 psi in the fuel rail pushing fuel through the injecter, plus the 9 to 10 psi (vacuum) sucking it through = 39 to 43 psi "across" the injector.
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^^^ What he said.:)
^^^ What he said.:)
:withstupid
:withstupid
Me too...:withstupid

cliffyk is THE resource!!! :)
Cliff is the man. Even though his posts make my inferior brain hurt. ;)

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Yes they are pink on my 02 gt and on my friends 98 gt thay are yellow, now would bigger injector like 24lb or 30lb add more power to the engine?
No , it would just lower the duty cycle
The pink ones are boush 4 hole up graded 21 lb. Fuel injectors used on the romeo 4.6 in the 01-04 gts i have an 03 and it is a faster car than the 99and 2000
Here's a quote from Jerry who was with SCT " All GT's have 19's. The pink injectors are 19# injectors. I have no idea where this 21# stuff started from but it's WRONG. Now, the 3.8L's do use a 21# injector since 1999 when they introduced the split port motor."

There is no better source of information than Jerry, no matter what internet myths are out there.
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