Hey I did a bit of experimentation the other day trying to diagnose a certain issue with my car. What I noticed was, the map sensor would give a certain value at idle, this value would increase as I'd step on it - but - as soon as the new / high RPM is stabilized - the map sensor signal value would default back to as it was on the idle. To rule out it was a sensor issue, I unplugged the pipe from the intake/manifold & created a vaccuum through mouth & the signal value would maintain instead of defaulting back. TLDR : it appears that the pressure in the engine would drop back after acceleration - which would naturally cause the map to lower down its signal - do you know if this is how its meant to be ? or am I experiencing some undesirable vacuum leakage (other details : toyota 5afe, knocking, occasional puffing in the silencer, possible tappet noise, possible rich burn)
Hey
I did a bit of experimentation the other day trying to diagnose a certain issue with my car. What I noticed was, the map sensor would give a certain value at idle, this value would increase as I'd step on it - but - as soon as the new / high RPM is stabilized - the map sensor signal value would default back to as it was on the idle.
To rule out it was a sensor issue, I unplugged the pipe from the intake/manifold & created a vaccuum through mouth & the signal value would maintain instead of defaulting back.
TLDR : it appears that the pressure in the engine would drop back after acceleration - which would naturally cause the map to lower down its signal - do you know if this is how its meant to be ? or am I experiencing some undesirable vacuum leakage (other details : toyota 5afe, knocking, occasional puffing in the silencer, possible tappet noise, possible rich burn)
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