Would these Ford injectors work?
02-11-2010, 08:25 PM
#1
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Year: 1996
Model: Cherokee
Engine: 4.0 HO
Would these Ford injectors work?
Hey everyone, I'm looking to do an injector upgrade on my 1996 4.0l Jeep XJ. I know that the Neon injectors work good, but they seem to be quite expensive. I found a lower intake manifold from a Mustang 5.0 with injectors on eBay. Are these the Ford injectors needed for an upgrade http://cgi.ebay.com/ebaymotors/87-93...s#ht_500wt_975 ? I have a Mustang 5.0 so the extra lower intake manifold is nice to have as a spare and the auction is probably gonna go pretty cheap. Thanks.
02-11-2010, 08:38 PM
#3
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Year: 1996
Model: Cherokee
Engine: 4.0 HO
Something more high flow to squeeze an extra MPG and better acceleration. Here's a huge thread full of confusion on the injector upgrade https://www.cherokeeforum.com/f2/mor...estions-13848/ . Basically, the stock injectors use a one hole design to spray the fuel, so less fuel is actually being used and some unburned fuel exits out the exhaust. When upgrading to a 4-hole injector, the fuel is dispersed more evenly and can burn more efficiently. Something to that effect.
02-11-2010, 08:46 PM
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Year: 1998
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Engine: 4.0
I have had probally 5 -5.0 Fox Body Mustangs and NONE have been 4 hole Injectors..so im gonna say those ARNT the ones you want. However i have a set of Neon Injectors if your interested.
02-11-2010, 08:56 PM
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Year: 1996
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The 5.0 injectors are still supposed to be an upgrade from stock. Do you have a set of 6 from a 2.4L or only 4?
02-11-2010, 08:59 PM
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Year: 1992
Model: Cherokee
Engine: 4.0
Give it a high flow OE replacement air filter (K&N, AEM), a tune up and a cat back exhaust.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
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02-11-2010, 09:04 PM
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Year: 1996
Model: Cherokee
Engine: 4.0 HO
Give it a high flow OE replacement air filter (K&N, AEM), a tune up and a cat back exhaust.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
Okay, so how much are you trying to get for the Neon injectors and is it a set of 6 from a 2.4L?
02-11-2010, 09:04 PM
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Year: 1998
Model: Cherokee
Engine: 4.0
Give it a high flow OE replacement air filter (K&N, AEM), a tune up and a cat back exhaust.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
02-11-2010, 09:07 PM
#10
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Year: 1996
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Forgot to mention that I already have a cold air intake, new plugs, wires, cap, rotor, distributor, CPS, and new Thrush turbo muffler. As for the cat, haven't gotten around to replacing it yet, but the PO decided it would be a good idea to rip it off and put a straight pipe in it's place. My buddy has a cat I can have but I need to pick up some exhaust clamps and I'll be in business with that. And yes I know, it's illegal, federal offense, all that stuff, which is why I'm putting a cat back on. Also, just not enough backpressure.
02-11-2010, 09:12 PM
#11
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He pretty much hit the nail on the head. Better fuel atomization = better gas mileage, smoother idle, and smoother acceleration
02-11-2010, 09:16 PM
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Year: 1994
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Give it a high flow OE replacement air filter (K&N, AEM), a tune up and a cat back exhaust.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
The stock yellow top injectors from a 5.0 are 19 pounds per hour, the stock XJ injectors are 21 pounds per hour. So you would actually be installing injectors with a lower pounds per hour rating if you used those yellow tops.
If you want an increase in AVAILABLE fuel volume, you want blue top Ford injectors:
The 93 Cobra injectors, as well as the 94-95 Cobra injectors And the aftermarket "Cobra" MAF/ECM/Injector kit all have 24 pound injectors.
However NONE of this matters because you cannot change the amount of fuel the engine receives unless you change the fuel map in the ECM of your jeep.
The pound per hour rating is measured at MAX FLOW RATE. Typically injectors will be sized to operate at a slightly lower volume than they are rated at, only because to attain that rated volume they would be open ALL the time (which would flood the engine). Your engine doesn't require enough fuel to fully tax the capabilities of the stock injectors.
If you install new (larger) injectors, the computer will automatically adjust the length of the injector pulse width by comparing the O2 sensor readings to a table in it's memory, then adding or subtracting pulse width to meet that preset value. (Pulse width is the amount of time the injector is "open" allowing fuel to enter the intake)
So no matter what you do, you can't alter the amount of fuel the engine receives by simply changing injectors.
02-11-2010, 09:20 PM
#13
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Year: 1996
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Alright, well they'll work I guess. My foot is usually on the floor so it would always be running a little lean 
02-11-2010, 09:24 PM
#14
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And if those would work, then these would work too http://cgi.ebay.com/ebaymotors/MSD-m...#ht_2439wt_956 which definitely fell off the back of a truck for $35.00 including shipping for 8 MSD injectors.
02-11-2010, 09:27 PM
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Year: 1994
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err well urs is a 96...so its OBDII so...i think urs should run on 49 psi constant so i think you wouldnt need the high pressure regulator...not to sure on the obdII jeeps hopefully somebody else chimes in