MAF readings correct or not?

[tolum]

Hi;

Took an OBDII to USB reader plugged in my laptop computer, Using a freeware, I did look to MAF readings. Here they are: At idle, motor hot (183F coolant), reading goes between 2.75 g/s (9.9 kg/h) & 3.0 g/s (10.8 kg/h) and at 2500 RPM, no load, between 9 g/s (32.4 kg/h) & 9.75 g/s (35.1 kg/h).

Are those readings correct?

I'm trying to resolve my small hesitation (cut) problem when suddenly hitting the gas pedal to accelerate. No CEL, no code, nothing, only a very thin cut when pressing the gas. Strange, it never happen when using the cruise control???

Thanks for the help

Thierry

[Loren]

Model year and engine?

[tolum]

Sorry, 2003 Boxster 2.7

Thierry

[Loren]

Sorry, 2003 Boxster 2.7

Thierry

[wvicary]

How do you mean that it never happens when the cruise control is being used? Has the throttle body ever been cleaned? Any mods done to the vehicle?

[tolum]

1- New Beru spark plugs last may (Problem was there before the change)

2- Throttle body cleaned in May (Was not very durty compare to what I see from others)

3- New air filter in May

4- MAF cleaned. The P/N on it is 986-606-125-01

Cruise story: When cruise control is set (70 MPH) for exemple and I'm climbing a hill, the car have to accelerate to stay around the set speed. I can't feel any cut or hesitation like when I personally hit the gas pedal. Maybe it's because cruise control go smootly on gas to keep set spped? But another detail, when I drive the car, if I want to accelerate, going smooth on the gas pedal, no problem. Probelm happen only when I hit the gas brutally.

Other observation: Let say I start the car. It is already hot. On neutral, if I hit the gas pedal brutally and release it immediatly I can ear the sound of the hesitation. It is not a constant zooooom from 650 to 3500 RPM. There is a very very thin an short missfire like at the very begining (less that 1 second) and after that the normal zooooom.

This is where I am...

Thierry

[wvicary]

Manual or Tip transmission? I take it that there are no engine codes. Is there any difference with the A/C on or off?

[tolum]

Manual, no engine codes. Didn't try the A/C on or off. will do today.

[tolum]

No change with or without A/C. Same very thin cut, mainly when low in RPM. Exemple, 2200 RPM in 5th gear when slowing down and entering an interstate exit, hitting the gaz will produce that small cut.

Thierry