with regard an 88 MAF car what sensor inputs does the ECU use to calculate what the engine load is?
Thanks

Simon

 

Engine RPM and airflow from the MAF sensor.

 

Thanks Greg.

The reason I asked is because I have most of the MAF table values set to zero and my injector constant set to 39 lb/hr to effectively shut off the injectors as I run on propane but have some MAF values in tables 4 and 5 as it runs weak on propane when I floor the throttle and need some gas to make up.
Trouble is with these values the ECU never sees any load on the engine and so the ignition is too advanced. Found this from using scan tool.
I only have a 2 dimensional spark table not 3d. So I can only vary spark advance with rpm not load. To prevent detonation I have to use near full load spark values for a given rpm.
Strange but it still drives well and no audible knock like I was getting. I think my knock sensor is broke as the only time it registers is sometimes on startup. Even when it is clearly audible craigs software registers no knocking.



Simon