ST185 Stock Fuel & Ignition Maps
 
The following maps are from the Japanese market Toyota Celica GT-Four ST185. The ignition map is straight forward to understand, and show total timing (ie base timing + advance). The load sites of each map, are listed with Toyota's code instead of an actual load measurement, such as psi, kpa, kgcm2, etc., so determining the load sites requires estimation. Based upon the timing, I would estimate that the "54F0" site is about 0 vacuum/boost, with the last site "5560" being approximately 12.5 psi (0.86 bar). The fuel maps are done in hex format, but George Betzos, a member of the GT-Four mailing list, was kind enough to convert the fuel map to numerical format.  As with the timing map, the load sites are in Toyota's code, so once again, an estimation would be required.

Stock Fuel & Ignition Maps

Back To Technical Page

This page was created by Dennis Heath.
If you should wish to ask a question about the GT-Four/All-Trac, you can join the GT-Four Mailing List, where I, and many others with GT-Four's, might have your answer. For information on joining go to http://www.onelist.com

Please note that I am not a mechanic by trade, and that any information offered on this web page is free and without guarantee. Should you choose to perform any of the procedures listed on this site, you will be doing so of your own free will, and I will not be held responsible or liable for any damages that might occur from using information obtained here.