A/F ratio spike on deceleration normal?
Jul 7, 2010 | 01:29 AM
Thread Starter
Joined: Jul 2009
Posts: 278
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From: Anaheim, CA
A/F ratio spike on deceleration normal?
I noticed that as soon as my engine is slowing down my drivetrain, for example if I put it in 6th gear to help out my breaks on a steep decent, my A/F ratio spikes. Is that normal?
Jul 7, 2010 | 01:56 AM
Joined: Apr 2007
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From: Northboro, MA
When you say spike, it goes up or down? By how much?
Jul 7, 2010 | 02:43 AM
Joined: Aug 2008
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From: Long Island, NY
Normal. When your in gear off throttle the engine is just puming air without fuel.
Jul 7, 2010 | 02:45 AM
Thread Starter
Joined: Jul 2009
Posts: 278
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From: Anaheim, CA
Quote:
Originally Posted by
Ziggyrama
When you say spike, it goes up or down? By how much?
it maxes out at 17. I have an AEM wideband.
Quote:
Originally Posted by
0jiggy0
Normal. When your in gear off throttle the engine is just puming air without fuel.
Thanks
Last edited by Synjn; Jul 7, 2010 at 02:47 AM .
Jul 7, 2010 | 05:32 AM
Joined: Dec 2005
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From: timonium,md.
Jul 7, 2010 | 05:39 AM
Joined: Feb 2009
Posts: 586
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From: Miami FL
Normal, injectors almost turn off when decelerating (engine braking)
Jul 7, 2010 | 05:52 AM
Joined: Feb 2009
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From: Cleveland, Tn
Yeah that's perfectly normal. If it makes you feel any better when my friend lets off the throttle in his srt-4, his a/f ratio spikes up to 20.
Jul 7, 2010 | 06:42 AM
Joined: Apr 2008
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From: In teh Mid-A
If you have the Innovate it will likely show 22.2 AF on engine braking
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A/F ratio spike on deceleration normal?
