PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

question for those of you with a wideband

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Old Oct 4, 2003 | 05:28 PM
  #1  
Blackbird's Avatar
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From: Bellevue, Wa
Default question for those of you with a wideband

when you decelerate in gear does your a/f go rich/lean/stay around 14.7?

mine goes into the 12's when decelerating and I always thought it should be leaning out not richening up.

want to get and idea of what others see.


thanks.

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Old Oct 5, 2003 | 03:51 AM
  #2  
blk~2000~Z28's Avatar
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From: Marysville, OH
Default Re: question for those of you with a wideband

With the throttle blade closed wouldn't any air stop flowing into the engine? I saw in a post that there is still gas being injected even though the throttle has been released. Just my Opinion though, sorry no info about widebands.
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Old Oct 5, 2003 | 12:33 PM
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red ws6 99's Avatar
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From: Las Cruces, NM
Default Re: question for those of you with a wideband

Depends on the situation and injectors, pump, regulator. When I did not have my 50 lb msd injector offsets and sizing dialed in, I would get a huge drop in AFR and then it would go back to 14.7:1, this was under light load. Once I dialed in my injector offsets very little drop.


At wot if you suddenly let off the gas you will get extremely lean say 20:1 (probably worse but thats what my fjo will read too).

Gary

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Old Oct 5, 2003 | 12:39 PM
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Cal
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From: Northern Utah
Default Re: question for those of you with a wideband

Yeah I think that's normal, mine does the same thing.
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