Probs With Fuel Burn And A Mistery

[pugbliss 0]

hi,

 

been having probs with my pug and narrowed it down to the afm,

 

My question is..... apart from belonging to diffrent cars what is the diffrence between a 1.6 & a 1.9 AFM??????

 

I ask cos m car is a 1.6 yet seems to run better with a 1.9 afm in............. now this sems strange to me????? as the car gets a better fuel burn with it in than a 1.6 afm connected up..... i def know its a 1.6 enigine i have as i have matched up all the engine numbers and also is does not have the spacer plate on the sump!

 

any help appriciated.

[Richie-Van-GTi 71 2 Cars]

spacer plate isn't the only factor, Ive seen 1.9's with no spacer. Maybe yours has a 1.9 cam and crank? Only real way to know is measure the stroke of the engine and inspect the cam.

[saveloy 8]

The 1.9 AFM is larger internally. You can decrease the flow via the spring to match it, to a point, to the 1.6 engine. But this will not work the other way around.

However, it isn't surprising to find the 1.6 running better on the 1.9 AFM. You will likely find t responds well to the 1.9 ECU too.