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Author Topic: Got myself some 19lb injectors.  (Read 6233 times)

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Offline Bounty Hunter

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Got myself some 19lb injectors.
« Reply #45 on: October 25, 2006, 01:34:42 PM »
I picked up a set of 8 at the junkyard today, pulled them out of an early '90s Crown Vic or Marquis.  How do I know if they're #2 or #3, and what's the difference?

I can post the numbers of the injector if they mean anything.

Will likely have 4 for sale real soon if anybody is interested.
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Offline Jeffy

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Got myself some 19lb injectors.
« Reply #46 on: October 25, 2006, 03:30:24 PM »
Ok, I looked into this some more.  It looks like most of the injectors are Design II.

The Design II's have a plastic upper parts on a steel barrel.  The Design III's seem to be all plastic.  The place I've been talking to doesn't recommend using Design III's in a 2.5L though.  I'm not sure other then it might make it too rich.  The Design III's are 4 hole spray pattern like the Design II/Ford D5B.
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

Offline Bounty Hunter

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Got myself some 19lb injectors.
« Reply #47 on: October 25, 2006, 09:51:06 PM »
I think mine did read D5B.  Thanks for the info.
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Jhcujo

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Got myself some 19lb injectors.
« Reply #48 on: October 26, 2006, 06:52:58 PM »
From the picture and the what Jeffey is saying mine were design 2. They are still working great! I am just happy to hear that others are seeing similar response to what I have seen.
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Offline Jeffy

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Got myself some 19lb injectors.
« Reply #49 on: October 27, 2006, 11:21:18 PM »
Finished a tank of gas.  Haven't noticed any change there.  Power is defiantly up around >2700rpm.  3000rpm's holds speed even up grades where it was iffy unless it was held at 4000rpm before.

It's not like doing a gear change but I think it's well worth it. :thumbsup:  :thumbsup:
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

wrangler387

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Got myself some 19lb injectors.
« Reply #50 on: October 28, 2006, 11:46:00 AM »
Quote from: "Jeffy"

I believe the 2.5L was something like 17lbs for the YJ.  I'll have to double check it with the FSM.


Yea but fuel pressure is a factor in determining flow, so if the 17lb injectors in our YJ were tested at the stock YJ 31 PSI fuel pressure (I think thats what the stock is), then when you move it up to 40+ which is what most injectors are used at it means the injectors are larger then 17lb. See what i'm trying to get at? Otherwise if they were tested at the usual 40+psi and are then run at 31 I don't think the injectors would even be big enough to run our motors. 17lb injectors are small, especially for a 2.5L motor.
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Offline Jeffy

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Got myself some 19lb injectors.
« Reply #51 on: October 28, 2006, 12:18:20 PM »
Quote from: "wrangler387"
Quote from: "Jeffy"

I believe the 2.5L was something like 17lbs for the YJ.  I'll have to double check it with the FSM.


Yea but fuel pressure is a factor in determining flow, so if the 17lb injectors in our YJ were tested at the stock YJ 31 PSI fuel pressure (I think thats what the stock is), then when you move it up to 40+ which is what most injectors are used at it means the injectors are larger then 17lb. See what i'm trying to get at? Otherwise if they were tested at the usual 40+psi and are then run at 31 I don't think the injectors would even be big enough to run our motors. 17lb injectors are small, especially for a 2.5L motor.


You'll probably also have to look and see what the fuel pressure regulator is set at also since that will also change the pressure at the fuel rail. (YJ) (TJ's have the regulator at the tank)  I'll have to look into this.  I'm sure the stock YJ injectors are indeed small.  Mfg's will typically choke the smaller engines so they do not come too close to the optional engines and to get more emission credits.
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

jeepboy21

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Got myself some 19lb injectors.
« Reply #52 on: October 28, 2006, 03:31:02 PM »
picked up and installed these today.  got mine outta 93 crown vic.  test drove it, slight difference.  good mod for >$30 but not a run out and do it right away.  i bet it will be nice heading over the hills though.
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jeepboy21

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Got myself some 19lb injectors.
« Reply #53 on: October 28, 2006, 04:34:41 PM »
Quote from: "Jesse-James"
White smoke can mean head gasket, pull your dipstick and see if it smells like coolant. Did it run hot?


did that its all fine.  ran the OBDI and found what was up.  the last injectors plug doesnt like to stay on the injectoer.  it was popping of just enough to throw a code.  not sure how i am gonna make a permanent fix for this one.
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Offline Jeffy

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Re: Got myself some 19lb injectors.
« Reply #54 on: September 13, 2007, 06:12:39 PM »
OK, I'm bumping this one back to the top since it's come up again.

Anyone know how to test the injectors for flow?  I installed the injectors several months ago then took them out to run the stock Denso's for a test.  I tried installing the injectors and the jeep runs like crap.  It feels like it's running on 3 cylinders.  Bogs down really bad when moving.  Installed the Denso's and it runs fine again.  So I think one of the Fomoco Bosch's bit the big one.  I'm not sure which one is DOA though.

I'm also wondering if anyone has tried the Fomoco Bosch Design III.  These are 24# I believe and do not have the metal drum for a bottom half.  These also have 4 jets but don't look like they use clips to hold them in place.

I've also got an ad, for injectors or someone to go halfs on a ebay set.
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."
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