kazfan30

iTrader: (18)

Truck has been running strong but real rich.. around 10.7 afr.. So I requested a retune. Nelson sent new ecm and i put itin this afternoon and installed it.. made a few wot runs And its around 13.0!! So I said hmm that's off. So installed old pcm And went for a ride. Made a few wot runs And its the same thing!! 13.1 or so??? Any ideas? Does it need time to adjust wot settings?

silverz28camaro

iTrader: (20)

it may need a little while for the computer to set in, but if it doesn't get any richer then 13.0 then maybe your pump is getting weak.

If you can hook up a fuel pressure gauge and during a wot run monitor fuel pressure

2 EDGE PERFORMANCE

You may want to clean the MAF Sensor. Sound like it might be dirty.

kazfan30

iTrader: (18)

well, the gauge shows 65 psi at wot, so i know the pump is good. I just cleaned MAF a little while ago and its still staying in the 13's afr ? And now my temp gauge in my dash quit working too i guess... it gets better and better.

kazfan30

iTrader: (18)

So has anyone ever had to have wot part of tune time to adjust??? Don't seem right? How can same computer have 2 different wot readings just from taking it out and reinstalling it?

regency

iTrader: (15)

pull the sensor from the exhaust and hook it back up, then turn the key on and see if its still in calibration

Bluehoonigan

I recently installed a new 4l80e transmission and 3000 torque converter and i have a low rpm misfire at idle and when I’m driving the truck won’t stop misfiring until I hit 3,000 rpm , im really confused on what’s going on, any input would be appreciated, it’s a 04’ 5.3 ls with bolt ons and was tuned already before torque converter was installed

Atomic

iTrader: (42)

No you do not have to wait for it to adjust for WOT. That whole computer learn thing is way overblown, it is typically set in a few minutes, not days or weeks like the internet makes you think and only at part throttle.

Rado1320

any dyno shop close to you?

BigKID

iTrader: (5)

What is your ECT in the scanner? If you lost the sensor, that could explain your fueling issue.

**Doh, duped by a thread dig!***