Come to think of it, my IAFM already started to have plobrem 2 years back, when Alex Thong(Ah Wai) told me and I disbelief. The trouble is, we've been focusing so much on the CPV damages, totally disassociate the issue with IAFM actuator, the heart and lungs of the entire system. People, please do your own checking as this is a guide from Alex. I do not know his LYN ID, perhaps
r3apers /
Mahihi will be kind enough to tell him I put this credit back to his contribution.
1) Have your engine running for sometime, make sure you drive for a longer period where your temperature indicator shows on normal working temperature(3 petak). Without the warmup loop, your IAFM will be at optimal opening/closing position. At idling revving speed, your IAFM supposed to shut the short runner and leave the long runner opened.
2) Have your bonnet opened. Best if you're at basement carpark at less crowded place.
3) Get your ass off the driver side fender, put your head as near to the engine intake as possible.
4) Switch off your engine and observe if there's air leaking sound came from the manifold.
Reason for this, is the listen to whether the IAFM valve is sealing tight between the long/short runner. The long runner should be sealed tight from air leaking to the short runner anytime below 4000rpm. Idling speed 900rpm or engine stopped 0rpm, the long runner should not leak air at all. If there's a leak, it has to be from the IAFM actuator that switches the long/short runners.
May not be the most perfect diagnostic, but this is the least we can do. As previously someone mentioned, get the IAFM fixed before the actuator totally broken off from the valves. Either you get fully recover and last a long long time. If it's slightly too late, the actuator can be detune to open 1/2 IAFM for short runner after 4000rpm, good thing is, it's still usable and able to shut tight for the long runner for low end torque maintenance. This, will also last a long long time. Until it's TOO DAMN LATE like my case, the valve already broke off from the actuator... there's nothing I can do to salvage it
You mean we can hear the air leaking sound from the IAFM actuator area thee right? On the left side
Oct 29 2015, 03:34 PM
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Regardless, I tried with my 808 previously, which is why the car ended up with a Rotary 13B from a Savanna 
20B is 
Lurv Shawie 
So damn many time rev cut went bem bem bem 
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