My new 1998 4Runner SR5- Dial-Up Beware

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Sep 6, 2006 | 07:32 AM

#41

4RunnerFever

Contributing Member

Joined: Mar 2003

Posts: 883

Likes: 0

From: Santa Cruz, CA

Hot Damn! The baddest 4Runner just got badder!! The mud looks great and I'm sure you'll get it tuned the more you learn about the different parameters. That 'offroad' picture doesn't look that different than our driveway (lol)

AWESOME :bigclap:

Graham

Last edited by 4RunnerFever; Sep 6, 2006 at 07:34 AM.

Sep 6, 2006 | 08:39 AM

#42

mt_goat

Contributing Member

Joined: Nov 2002

Posts: 10,666

Likes: 5

From: Oklahoma State

Quote:

Originally Posted by mastacox

One question: when engine braking down a steeper hill (engine vacuum around -20 in-hg), the AFR goes off-the-gauge lean. I thought I remembered reading somewhere the ECU turns off fuel to the cylinders while under heavy engine braking. Is this true, or do I need to dump more fuel into the cylinders? This only happens when I am engine braking down a steep descent and turn off OD or shift into 2nd.

That's right, no fuel under heavy engine braking, so there wouldn't be a A/F ratio to see. I've heard you can do a free air calibration during that time.

Glad to see it running good!

Last edited by mt_goat; Sep 6, 2006 at 08:40 AM.