The V8 Owners Forum -

ok im still having problems with my V8, and ive chequed alot of the electrics and all seems ok so far, i also found a problem with the dizzy (had abit of water inside ) so now its running better but not 100% and im still getting popping through the air box!!!!!


its time to start to take things apart now to see if its something mechanicle... i realy want to see if the cam is timed up correctly, i tryed to work it out through the oil filler cap but the cam that i have must have a flat apex on it as the exhaust valve stays at its peek for atleast 8 degrees so i cant find the exsact point of where its fully closed so i cant tell if its timmed up properly.....

i started to take parts off and got to the plenum chamber when i found out this happened... god nos why i started it but kinder glad i did....

i know the fueling is going to be messed up as it hasnt got the stepper motor plugged in, the air flow meter, the potentionmeter, and the trummpets are fully open.......

BUT IS THIS REALY MENT TO HAPPEN???????

http://uk.youtube.com/watch?v=4nhfG6nB37c

Suprised it didn't rev uncontrolably - risky one! I think the fact that its so sick is the only thing that saved you!.
From memory the engine will run without the AFM, just a bit rough and not rev - certainly better than yours is.
Are you sure all the plugs are good, the leads are in the right place, coil is producing a good spark, dizzy distributing that spark and you have got decent fuel pressure?

disco-v8 wrote: i know the fueling is going to be messed up as it hasnt got the stepper motor plugged in, the air flow meter, the potentionmeter, and the trummpets are fully open.......

BUT IS THIS REALY MENT TO HAPPEN???????

http://uk.youtube.com/watch?v=4nhfG6nB37c

Although I am a Flapper SD1 person I'm not sure that anyone can answer the question, because there would be so few people tried it.

You have one massive air leak into the plenum chamber that normally has none.

The mixture would be pretty weak and the ECU would not know if it were Tuesday or half-past-three.

With the Plenum removed, I recommend you clean everything according to:

http://www.vintagemodelairplane.com/pag ... num01.html

put it all back together to test as per your system dignostic, my flapper schedule is like this:

http://www.vintagemodelairplane.com/pag ... djust.html

It might help and there is loads of other diagnostic stuff on the site.