7.3L Fuel Crossover Kit? - Ford Powerstroke Diesel Forum
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Old 06-26-2010, 09:22 AM
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7.3L Fuel Crossover Kit?

Has anyone done this? Did you make your own kit or buy one and if so where and how? I was told that injector #7 is starved for fuel and by doing the kit it helps your truck idle better, run smoother and keeps from frying #7 cylinder. Any input would be great. Thanks!
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Old 06-26-2010, 09:28 AM
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never heard of a FUEL crossover for a 7.3.

u sure ur not thinking of high press oil crossover. if so that will smooth out the idle a bit. i bought one for my truck from dieselsite.com
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Old 06-26-2010, 10:58 AM
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Its called a CCK (cross connect kit) dinofuels is who sells it I think and it is the #8 injector that is starving for fuel and catches all the air in the line, HPX doesn't solve that problem I put HPX on my truck and didn't notice a difference
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Old 06-26-2010, 12:28 PM
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I just installed the FRX kit from riff raff this morning on my '01. It quieted the injectors by a noticeable amount. Small performance gain if any at all according to the butt dyno. A bit quicker throttle response too.

My wife was riding with me while I was out working the air out of the lines as per the instructions and she commented on how she can hear the radio over the engine now...
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Old 06-26-2010, 12:31 PM
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Just do a regulated return... it will up your fuel pressure and it will eliminate the dead head in the heads.
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Old 06-26-2010, 12:56 PM
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Riffraff Diesel has his own 130 dollar version of the fuel x-over. seems pretty good. I did the oil x-over on both mine. seemed good.
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Old 06-26-2010, 01:03 PM
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whats a good regulated fuel return product?
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Old 06-26-2010, 08:01 PM
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Does anyone have instructions for a DIY regulated fuel return? I was told it was #7 by a guy that has his old motor sitting on his garage floor right now, but wouldn't you think it would be both #7 & #8 I mean those would be the last 2 cylinders to receive fuel wouldn't they?
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Old 06-26-2010, 08:20 PM
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tyson, i believe the firing order has alot to do with why the #8 is starved and not the #7 cylinder.
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Old 06-27-2010, 03:49 AM
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cylinder 8 is the last one back to the firewall on drivers side. Cylinder 6 directly in front of it. The problem for fuel and hpop pressure starvation is number 6 fires and number 8 right after it. Ford used an AE long lead injector in the number 8 hole to fix this.
THe oil x over line helps too. It allows all the pressurized oil in the pass side cyl head rail to be used too when firing these 2 cylinders. The 130 dollar kit from riffraff will allow fuel to not be a dead end system. Its cheap(sort of) IT will also raise the fuel pressure a few pounds(hes done the spring shim mod, in the piece itself)
THe reguated returns are real good, but are you looking to make a motor run better or build high horse power.
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