This is topic Detonation what the hell in forum Tech Talk at Northern California Ford Owners  .


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Posted by 89SC50 (Member # 6248) on :
 
since converting to 5spd from aod I have detonation proplems at stock timining with premium feul. it was not a problem with 18* advance with the aod never did it once. It is a stock motor with bolt-ons just put in a9l didnt help, are there any other reasons for this the advance comes from the ecu right?
 
Posted by 89SC50 (Member # 6248) on :
 
or could there be a sensor gone bad that is giving the ecu bad data and causing it to do somthing like advance it to much?
 
Posted by 50DADDY (Member # 3076) on :
 
18 degrees [Eek!]
 
Posted by 92stangLX (Member # 3252) on :
 
quote:
Originally posted by 50DADDY:
18 degrees [Eek!]
Yeah no shit [Eek!] Set the timing at 14 degrees and see if it still detonates. If it does then keep retarding the timing.

Are you running 91 octane?
 
Posted by 89SC50 (Member # 6248) on :
 
at 10* it detonates with premium.
 
Posted by 92stangLX (Member # 3252) on :
 
quote:
Originally posted by 89SC50:
at 10* it detonates with premium.
Did you pull the distributor recently? It sounds like your timing is off.
 
Posted by 89SC50 (Member # 6248) on :
 
The distributor was pulled a while back at a shop, is there a way I can tell that it is off by looking at it or how can I test it? thanks for the help I am going crazy.
 
Posted by 89SC50 (Member # 6248) on :
 
The distributor was pulled a while back at a shop, is there a way I can tell that it is off by looking at it or how can I test it? thanks for the help I am going crazy.
 
Posted by Curt (Member # 6254) on :
 
pull the plug outta number 1 (its the first on the passengers side) and put a pipe cleaner in there, or a straw, and have somebody crank it, when the pipecleaner is at its highest point have them stop and look at the number one position on the dist, if its not pull it out adjust it
 
Posted by 88gt (Member # 579) on :
 
You will need a timing light to know for sure what your timing is. In the meantime, are you running 91 gasoline?
 




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