ANGEL Z28

Have anybody use ACD 213-4657? Is it a good replacement part? I have a stock engine, with 3.90posi When does my engines supossed to chage from close to open loop?

ANGEL Z28

When does the engine suppose to change from open loop to close loop? sorry i am kinda newbie.

Injuneer

From startup, three conditions need to be met for transition to closed loop:

1 - O2 sensors heat up to operating temperature (~600°F), and become active.

2 - Coolant reaches required minimum temperature, usually about 140°F, but can be higher or lower.

3 - Timer in PCM times out, usually 206 seconds.

ANGEL Z28

Thank you!!!! What about the maf? Is it a good option for a stock engine?

Sent from my Desire HD using Tapatalk 2

Injuneer

Shoebox has the part numbers on his website. That does not appear to match any of them.

1993-1997 F-Body Part Number Collection

shoebox

At the AC-Delco website, 213-4657 appears to be the current stock MAF number. It was joined some years ago with the LS1 MAF.

With numbers changing all the time, it is not really possible for me to keep my list super current, but I try to update it as changes are brought up..

Injuneer

Sure looks a lot different.