Need help with fuel injectors

#41

I guess maybe I got confused by your question when you said "will the computer think 19# injectors at 50 psi are the same as 24# injectors at 40 psi". There is also no input in the computer for injector lb #. The computer uses things like voltage offset, high slope and low slope, breakpoint, to set the fuel trims. Different injectors have different ratings at different PSI. When you increase the PSI it just makes the injector act differently than the computer is expecting, it doesn't just think you dropped a bigger injector in there, you're just forcing a rich condition.

I couldn't find 19lb injectors at 50PSI but below is an example of ratings for a 24lb injector at 55PSI vs 30lb injector at 39 PSI. Maybe the difference isn't noticeable to us when driving but the computer knows.

 
#42

Wideband doesn't hook up to your stock computer, there is no input for it. The computer cant make adjustments based on an added wideband 02, it can only make adjustments from your stock O2. A wideband allows you to hook it up to a gauge that will give you a live reading of your AFR.

Aftermarket computer setups or something like a Quarter Horse allow you to hook up the wideband for data logging, but the computer doesn't actually make adjustments from what the sensor is reading. You take the reading yourself and make adjustments to the tune. Oh and you would need to add an extra bung on your exhaust if it doesnt already have one. You should always leave the stock O2 sensors in place. Without them the computer can't make adjustments.
 
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#43
you need the 02s obviously, if the parts counter person can't find an 02 for a 95 5.0 push rod engine then they don't know how to A: input proper info B: can't properly read a computer screen.
DY1401 Motorcraft
Ok, in defence of the counter person, Rockauto lists upper/lower/right/left but same part number so they didn't comprehend what they were looking at.
 
#44
I’m not sure of the function of the second O2’s? Weren’t some of these used as a confirmation of functionality of the cat?
I don’t think the secondary o2 affects fuel trims…???
But I didn’t realize the 95 used a secondary o2 either, lol.

The stock ecu cannot accept the signal from a wideband o2.
However, most wideband kits do have the capability to ‘simulate’ the narrow band signal to the ecu, while still running the true wideband signal to a gauge on the dash, or a data logger.
I ran this with an innovate LC-1 for a few years, using moates quarterhorse on a 2.3.
 
#45
Even the dealer tried telling me I have four sensors, when I only have two. I honestly think there was a mid-year change, or anticipated change, in the cars or the catalog. The 1994, which I expect to be identical to the 1995, only has two O2 sensors (like my car), the 1996 4.6 SOHC has the 4 listed in RockAuto for a 1995. Again, I think it was in anticipation of OBD2.
 
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#46
To be clear, there are only two (total) O2 sensors on my 1995, Only the primary, like a 1994. Not an upstream and downstream like 1996 (or the 1995 V6). The 1995 5.0 does NOT use a secondary O2 sensor.
 
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