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francesconyc francesconyc is offline
911SC '82
 
Join Date: Feb 2024
Posts: 472
Garage
Quote:
Originally Posted by AndrewCologne View Post
@Francesco

You have a lambda based engine management, correct?

Did you followed the proper initial setup instructions?
https://nineelevenheaven.wordpress.com/the-911-sc-3-0-engine-with-catalyst-and-lambda-control/

If with correct a set up the issue continues, then ... attach a DMM .. to pin 2 to the ECU connector below the passengers seat and check if the voltage of the o2 sensor while your problem occurs and check the voltage, ... it should swing within 0.1 and 0.9 volts.
If not then check the duty cycle at the test port in the left engine compartment (also explained in the link above) ... I guess your ECU is driven mad cause of a non proper initial CO setup.
oh interesting, i will try the ECU voltage test!

I believe the dizzy/timing etc is correct (I remember checking it a while ago abd also mu mechanic i think they did)


to me it seems definitely a richness mixture problem: also because i forgot to mention that my exhaust system (i told you i replaced all exhaust and new Dansk muffler Sport) now pops a lot after I get the symptoms mentioned above (which i love it haha, but i understand it maybe be due to gas to be too rich? right?)

what else regulates the richness/lean of the mixture? is it the ECU only or also the WUR?
Old 06-27-2025, 10:37 AM
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