a1collier
NAXJA Forum User
- Location
- Cape Girardeau MO
i have a chance to get some 2002 Mustang GT fuel injectors for a pretty fair price.are these too new or will they work for my 90 XJ with a 93 motor,but the 90 intake and fuel rail on it.
4xBob said:On my 1990 4.0 the switch from OEM fuel injectors to Denso fuel injectors for a Ford Mustang (from fiveO) solved the problem with injectors leaking at the seam, made NO CHANGE in mileage ( I checked carefully), and no change in driveability. Perfect swap.
I think the reason most of us do this is because it is a cheap way to replace our worn out, leaky injectors. The mustang injectors are 19/lb injectors....same as XJ stock.Rick Anderson said:Guess what happens when the A/F Ratio gets too rich? You lose power, but at least your mileage suffers greatly with that loss in power.
So why do you want bigger fuel injectors?
If you get more AIR AND FUEL into the cylinder you will get more power, that way you still have the proper A/F ratio and more air and fuel creates more pressure to push down the piston and give more you torque/power.
So, unless you've modded the motor so much that it takes in so much more air, the stock injectors can't keep up with the extra air and now the A/F ratio is leaning out, bigger injectors aren't going to do anything but hurt.
Of course, the Chrysler and (I think) the Renix fuel injection systems are ADAPTIVE. Meaning they use the O2 sensor to measure (technically tell the controller when it hits 14.7:1 A/F ratio) the A/F ratio and adjust how much fuel is injected to get the designed A/F Ratios. So if you install bigger fuel injectors, it will inject more fuel, FOR ABOUT 3 SECONDS, before the controller figures the A/F ratio is out of whack and adjusts the bigger injectors to inject the same amount of fuel as the old smaller injectors were. So your just wasting your money, unless you've modded that so much, that it is flowing in SO MUCH AIR, that the stock injectors are going lean, then bigger injectors would help.