Air flow meters lucas/hitachi 3am lucas 5am

[dwgriffith]

I suspected the afm maybe an issue on the griff so down the breakers for another one to try. There have been several non conclusive posts whether the 5am can be a direct swap for the older 3am? The only decent one I could find was a 5am of a 90'2 jag. I can confirm that they do appear to be directly interchangeable, both fit and running characteristics. Unless of course somebody else knows any different? for some obscure reason.

[dnb]

I have a Griff one you could borrow if no-one knows the differences.

[dwgriffith]

I took a risk on it earlier and fitted it, drove around for 15 miles to test. I could sense no performance difference between the two types at all, so I guess they must be functionally identical.

[K4000JB]

i have fitted both a 3am and a 5am afm to my precat with no probs only thing that needs doing is the mixture needs setting at idle
cheers ant

[dwgriffith]

On your car do you recall what the base co voltage setting ended up at for the correct co value?

[griffter]

dwgriffith said:

On your car do you recall what the base co voltage setting ended up at for the correct co value?

Mine's 1.2v on a 92 4.3 - TVR Power map.

[K4000JB]

sorry for the delay the trim voltages are on the rpi website iirc (i dont have them to hand cos i no longer run the hotwire system )there is different voltages for non-cat and cat cars
hope this helps