instaling 19#'s

[kowalski]

alrighty well i got my 19lbers today and im going to install them tomorrow or the next day. now im wondering is there anything else i have to do configuration wise? im putting them in my 318 so its an M42 somone was telling me about having to adjust my AFM so it doesn't run rich.

[EverWiser]

From what I understand people install an adjustable fuel pressure regulator at the same time as the injectors and then reduce the fuel pressure to keep the car from running too rich. You still want it to be a little rich and let the ECU correct for it. Over the course of several days you continue to "bump" the pressure back up until you're back to stock pressure and the ECU has adapted to the increased fuel flow and has the air-fuel-ratio back to "normal"...

[nickmp0wer]

I would think you could just disconnect the battery overnight and then the ecu would be reset so it would start fresh with the new injectors

[EverWiser]

I would think you could just disconnect the battery overnight and then the ecu would be reset so it would start fresh with the new injectors

It would revert to a baseline map which would still make it run way too rich being the new injectors flow nearly 50% more fuel at the same pressure as the old ones. You can try it but your car will run like shite and probably wash the oil off your cylinder walls with all the excess fuel...

[nando]

I would think you could just disconnect the battery overnight and then the ecu would be reset so it would start fresh with the new injectors

doesn't need to be overnight.. a few minutes is enough.

once you have them in, go drive the car hard, taking it up to redline a couple times. this will help the ECU reduce the duty cycle and map out the new injectors. no need for an AFPR either.

[kowalski]

alrighty well i wont have a problem redlining her:P so just put it through its paces for a little while and that should be good? how long should i expect it to take before it learns the new injectors.

[Mystikal]

My car fired up immediately after installing 17.5's, didn't even idle weird afterwards. Good shit.

[kowalski]

alrighty well i just dropped the 19's into the M42 and she runs good, start up was a little lean but didn't idle poor, didn't even run poor, runs pretty good actualy. anyways how long does it usualy take before the computer learns the injectors?

[nickmp0wer]

100 miles or so i think, although most of the learining is probably in the first 100 feet

i know i asked before but i forgot what you said, are the m50 ones the right ones to use?

[kowalski]

these are out of the 5L mustang, bosch 4 pintle type 2's