ademondad666
New member
Just wondering if anybody knows if ford 302 injectors are an upgrade for a 4.0,or am i just running the same thing?
injector upgrade?
- Thread starter ademondad666
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Bounty__Hunter
Super Moderator
What year 4.0L engine?
I run Ford 302 injectors in my 2.5L engine from a mid '90s Crown Vic. Switching from the single nozzle jeep injector to the quad nozzle of the Ford injector really smoothed the jeep out.
I run Ford 302 injectors in my 2.5L engine from a mid '90s Crown Vic. Switching from the single nozzle jeep injector to the quad nozzle of the Ford injector really smoothed the jeep out.
JPNinPA
Well-known member
Bounty__Hunter
Super Moderator
I just grabbed mine from a mid '90s Crown Vic, maybe '95 also. They're yellow and plug right into the YJ. Also check out 4BangerJP.com - Index for some great 2.5L tech.
ademondad666
New member
Well, i have a 97 4.0. the ones that were in it were grey, and the ones i put in are orange. they look the same other than color. it seems to load up or something. if everything i did to lean it out, and be more fuel efficient, its really adding fuel. im going back to stock. its smooth enough without them. thanks for input.
JPNinPA
Well-known member
Could you go into a bit more detail you kind of lost me. Were you trying to lean it out or you had in the past and now your back to normal.. Or not:scratch:
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Bounty__Hunter
Super Moderator
A lean condition does in no way mean better fuel mileage. The benefit of installing different injectors is to increase power output if the engine is modified to the point where it can burn the extra fuel. More power means the engine has to work less, and can possibly mean better mileage IF you can keep your foot out of it.
ademondad666
New member
i have fuel max performance chip(which says it changes the air intake temp sensor, to lean it out for better gas milage), intake system,machined throttle body, accel super coil , banks full exaust= better gas milage. then i added the injectors, and it backfires kinda, but not exaust,(loading up). so im gonna take the 302 injectors out to see if it still does it or something else is doing it. also i felt no more power, or nothing smoother about it. is it just for the 2.5? they were out of late eightys bronco,maybe there just old and beat or not the good ones. if i have to, ill take the fuel max performance chip out,think its doing the opposite as everything else?
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JPNinPA
Well-known member
Can't comment on the chip. I have heard more no effect, than real positive on any chip.
Anyway, When you did the swap did all the o-rings come off with the old injectors? Did all the new injectors seat? Could it be a leaky seal or dirty injector? All might not be lost.
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Bounty__Hunter
Super Moderator
If you want accurate detail on what the engine is doing, pick up an AFR gauge like the JET model that uses the OEM o2 sensor.
Jester32
New member
I upgraded to the ford bosch injectors once mine started leaking down i have a 92 cherokee. Helped with starting and mileage a bit. The 4.0l run real lean from factory to help with emissions. And a little fuel goes a long way. The injectors will make the biggest difference with better exhaust and an adjustable map sensor. The computer will just cut the pulse width to get it back to lean without the adjustable map. You can also trick it with a resistor in the temp sensor to trick it to stay in cold engine fuel maps which is alot richer.
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