PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

timing?@wot

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Old Nov 29, 2003 | 11:07 AM
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Default loss of timing at WOT from 30* down to 24*?!?!?!

my timing in my program was set at 30*. It went to 24-25* with 0 kr. What can cause this? Thanks

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Old Nov 29, 2003 | 05:14 PM
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cone on guys i need some help. in my tune, i have to check on it but i was told i was getting enough timing fed into it 30* at WOT and a while back it was right at 30.4* now i tested it out today and stayed at like 24* what would go wrong to make the timing be knocked bcak like that? i dont have any knock any more SOMEONE HELP!!!!
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Old Nov 29, 2003 | 05:31 PM
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also, if it is the tune will adjusting it to 30* cause the air/fuel ratio to change?
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Old Nov 29, 2003 | 05:57 PM
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Could be your pcm pulling some timing because of high intake air temps from hard driving. Mine is set up to pull 3* under WOT if the Intake temps go above 60*celcius. I think some people have problems like this and never can figure out where the timing goes. Mine is always at least 1* lower then what edit is set at.
Generaly if you raise timing you should add a little bit of fuel but it depends on how much timing you add and if you see KR if theres no KR i`d just leave it alone.
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Old Nov 29, 2003 | 06:12 PM
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most likely in the low timing table
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Old Nov 29, 2003 | 06:19 PM
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well put it this way, my intake air temp was 39* when i tested this and the coolant temp was about 172* lol
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Old Nov 29, 2003 | 06:28 PM
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how much power could this be losing me? i thought the car felt "slow".......
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Old Nov 29, 2003 | 09:07 PM
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I would second low timing table.
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Old Nov 30, 2003 | 12:38 AM
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Yea sounds like your in the low octane table. Go fill your tank (put over 5 gal in) and go retest. If that dont work let us know.
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Old Nov 30, 2003 | 07:54 AM
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I don't think its a low timing table issue. It would be lower than 24degrees... it would be 19 degrees or lower.

There are many variables that the PCM uses to figure out max timing. 172degrees coolant? That may not even be hot enough to be in closed loop... I'm not sure exactly what temp closed loop requires..

Is your torque management zeroed out?

Tommy
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Old Nov 30, 2003 | 08:01 AM
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torque management? isnt that for autos? anyone know how hot you need to be for closed loop? im gonna email my programer and have him look at the timing tables and see whats up, thanks guys keep em commin
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Old Nov 30, 2003 | 08:14 AM
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going out now to put about 8 gallons in and ill post the results of that
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Old Nov 30, 2003 | 08:35 AM
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My car runs at 150 degree's in this cold weather and I'm in closed loop.
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Old Nov 30, 2003 | 08:50 AM
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ok, i think i might have found why. i did put gas in it but i noticed taht i only had my 5000 rpm pill in so i took a few runs to about 135 in 4th and made sure i let it go to about 6200 and the timing was jumping up from 24 to 25 and so on up to about 28 or 29 before i backed out. so would not leting the engine rev out like that cause me to get low numbers like that? im gonna have him double check the program just to make sure.
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Old Nov 30, 2003 | 08:54 AM
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i did find out i prob need new brakes, they were vibrating and knockin pretty bad. think ihad a bad slider in there with no grease that freaked them up however that was a nice early morning rush
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