Help with startup (open loop) fuel problems
Thread Starter
Joined: Jan 2003
Posts: 1,455
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From: Fort Worth, TX
Help with startup (open loop) fuel problems I have been having stumbling and rough driving problems with my car until it starts heating up or hits closed loop. I think I may have found the problem. Could ya'll please verify for me?
I looked in the Open Loop EQ Ratio and the #'s were as follows:
All #'s are 20-100 Manifold pressure (KPa)
14*_____1.32-1.41________(11.1-11.4 AFR)
32*_____1.27-1.32________(11.5-11.1 AFR)
50*_____1.24-1.32________(11.8-11.1 AFR)
68*_____1.22-1.31________(12.0-11.2 AFR)
86*_____1.15-1.24________(12.7-11.8 AFR)
104*____1.06-1.16________(13.9-12.7 AFR)
122*____1.10-1.19________(13.4-12.7 AFR)
140*____1.06-1.16________(13.9-12.7 AFR)
158*-194*____1.00-1.10___(14.7-13.4 AFR)
According to editor it says to take your Stoich AFR 14.7 by the table value. In doing so it looks like it is way rich until warming up. Can I just adjust this table to around 12.5-13.0 (or whatever would be ideal from your input) to lean it out some and hopefully my cold driving problems go away?
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I looked in the Open Loop EQ Ratio and the #'s were as follows:
All #'s are 20-100 Manifold pressure (KPa)
14*_____1.32-1.41________(11.1-11.4 AFR)
32*_____1.27-1.32________(11.5-11.1 AFR)
50*_____1.24-1.32________(11.8-11.1 AFR)
68*_____1.22-1.31________(12.0-11.2 AFR)
86*_____1.15-1.24________(12.7-11.8 AFR)
104*____1.06-1.16________(13.9-12.7 AFR)
122*____1.10-1.19________(13.4-12.7 AFR)
140*____1.06-1.16________(13.9-12.7 AFR)
158*-194*____1.00-1.10___(14.7-13.4 AFR)
According to editor it says to take your Stoich AFR 14.7 by the table value. In doing so it looks like it is way rich until warming up. Can I just adjust this table to around 12.5-13.0 (or whatever would be ideal from your input) to lean it out some and hopefully my cold driving problems go away?
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Be careful leaning that table out, as what you command below operating temps is not what you'll get...you actually need to command richer than stoich to get a stoich AFR out of it. It does look like it can be leaned out though...
Just be warned, if you set that table to 1.0s across the board, it'll run lean as **** (hence my comment above). Soundengineer has done some research on this, most covered on this forum and in the HPT forum.
Just be warned, if you set that table to 1.0s across the board, it'll run lean as **** (hence my comment above). Soundengineer has done some research on this, most covered on this forum and in the HPT forum.
Originally Posted by BAIN
Thanks for the heads up. I was thinking of leaning it out to around 12.5-13. Is that too much?
