Todd Gilbertson wrote: Hi Wes
Thanks for the input from all. I looked at routing my pcv before the throttle body. My Ford has quick connect hoses for vacuum breather and pcv venting. I’m going to unhook the pcv hose and put a cap on pcv and intake and I will be done without routing anything. I’ll add picks Incase anyone else has a similar setup.
Do you know where the best ecu relearn is described?
Thanks once again!!
lots of cars in your stable, and you're crossposting various queries for various cars in other threads...I'm a bit confuzzled, Todd-o. Pics with each of these would be amazeballs in awesomesauce, not only for others to reference, but for us to keep your goings-on a bit more straighter.
I've had my best results with letting the car sit overnight (8-12 hrs) without battery connection: any capacative charge in any of the computers will have drained, and the car will be starting from fully cold. These I believe are key points: we are forcing the computer to revert to base factory programming, and as it warms up to hot idle, it re-writes that part of the fuel map. I suspect most people get impatient and don't let their cars get up to full hot idle/closed loop before they do their conditioning drive, but the fuel delivery map depends on that - until closed loop is achieved, the computer isn't listening to the o2 sensor(s) to further tweak fuel delivery as you drive.
Computers are stupid. they only work properly when fed information within parameters they're programmed to understand. If we send them information from the sensors too close to (or beyond) or beyond their limits of understanding, they crash - in our case, thats the dreaded Check engine light/Malfunction Indicator light. we don't control the base programming of the computers in our cars, but we can influence them with sensor tweaks, and then let them learn the "new normal"
Another few tips: Don't touch the brake or gas during the initial start from cold. Those will alter -albeit slightly (or maybe more)- the depth of vacuum and the amount of fuel delivered, so you will likely taint the re-learn process. open the door, reach in and turn the key, and then give it a good 10 minutes to get to closed loop, then turn it off for a minute, and start it up again.. turn it off again for another minute, re-start, put it in gear, ease off the brake and let the car pull you without touching the gas - this is it trimming fuel delivery: when the power drops off, it will have trimmed for idle, so stop and turn it off, then restart and drive the speed ranges as recommended in the manual.
OH! I almost forgot - make sure the alternator sees a good heavy load during that first start from cold: blower fan on high with AC on and rear defroster, 4 ways flashing, wipers on high, power windows/locks moving...this forces the engine to work just enough to turn the alternator to power those things AND the computer you're trying to school. If that's the baseline you teach it, it will forever think that's "normal engine load," but you won't always start up with that all going on, so you'll be SUPER tight on fuel delivery from there forward.
keep us posted on how it goes - and nevermind what your neighbours think of you when they see you doing this.