Welcome Guest [Log In] [Register]
clubae111.com is the largest community forum of English speaking AE111 owners on the internet today with over 2000 members plus a wealth of information and resources relating to the AE111 chassis and 4A-GE engines.

Join our community today!

If you're already a member please log in to your account to access all of our features:

Username:   Password:
Add Reply
Knock sensor/Distributor question; What does it do?
Topic Started: Jul 29 2012, 08:28 AM (174 Views)
viper33
Stage 4
I was looking at a few 20v pictures the other day only to realise that one of them was about various sensors on the car including a knock sensor
Now I do know what a knock sensor does and how it works but what im trying to work out is how does the ecu retard or advance timing on a distributor type ignition setup?
Coz as far as I can tell the dizzy is a mechanical system and can't be changed electronically, so whats the point of a knock sensor?

Thanks
Offline Profile Quote Post Goto Top
 
1i1
Member Avatar
NZ Toyota Parts Guy

Hook a timing light up without putting a clip in the diagnostic port. Then try adjusting the timing.
Offline Profile Quote Post Goto Top
 
viper33
Stage 4
So what am i expected to see?
I really don't wanna go touching my timing, already did it last week
Offline Profile Quote Post Goto Top
 
1i1
Member Avatar
NZ Toyota Parts Guy

Like a carb car with a vacuum advancer the ecu will adjust the timing unless you set it correctly by putting the pin in the diagnostic plug.
Offline Profile Quote Post Goto Top
 
viper33
Stage 4
I may be wrong but I didn't think that the ecu controlled the vacuum advance?

The only other way to change timing as far as i know is to change the springs and weights inside and the ecu can't control that

Not trying to be a smart arse, just wanna know exactly how the ecu alters timing
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
« Previous Topic · ECU / Electronics · Next Topic »
Add Reply