Maxing out the MAF what are the symptoms

[2barxr]

Hi all I believe I am maxing out the MAF I just want to confirm that.

Car runs strong I get to around 12-15 PSI WOT and then it will fall on its face I believe fuel cut until the RPM drop then it will come back.

AFR go down to 9.8 at full song so I do not believe lack of fuel at this point

car is chipped and I am not close to the redline ported head Do 88 intercooler IPD turbo cam stock MAF and injectors 19/20T BB/STS turbo "may be the issues" 15G didn't do this as bad

any input would be appreciated.

Note. I do plan to get a stage 2 chip and run the larger MAF and injectors just want to bake sure there is not something else going on

 

[Lankku]

Can't remember if LH2.4 has a max injector pulse width/duty cycle set. AFR is so rich that I wouldn't be surprised if fuel cut is because of that. Also that much fuel could and would cause ignition problems with a stock system.

 

[2turbotoys]

You are probably just maxing the flow through the MAF, causing it to go over 5V, which causes a fuel cut. But you are way too rich, not good for your engine. Your oil probably stinks of gas and causing premature wear.

 

[K9 240]

I had chips which removed the fuel cut. I always thought when it bogged down like yours it was due to too much fuel. The ECU seemed to just dump all the fuel in at a certain point.
Tried all the tricks on here to alleviate problem including a potentiometer which I think reduced the signal from the MAF to the ECU. This worked at WOT but gave equally unacceptable hunting at lower revs/idle.
Eventually cured it by getting a Speeduino, which I did not want to do but has proved to be way better in many ways.
From the mods you have already done I think you will not be satisfied with the stock ECU with whatever chips for much longer, probably better to put your money towards an a/m ecu (and possibly fuel pump!) sooner rather than later.
Tim

 

[2barxr]

You are probably just maxing the flow through the MAF, causing it to go over 5V, which causes a fuel cut. But you are way too rich, not good for your engine. Your oil probably stinks of gas and causing premature wear.

14.5-7 normal AFR it only goes down at WOT and around 12 psi @ 9.8-10.2 AFR 15 psi 10.5 -10.8.

i didn't have the issue as much with the 15G as I do now

 

[2barxr]

I had chips which removed the fuel cut. I always thought when it bogged down like yours it was due to too much fuel. The ECU seemed to just dump all the fuel in at a certain point.
Tried all the tricks on here to alleviate problem including a potentiometer which I think reduced the signal from the MAF to the ECU. This worked at WOT but gave equally unacceptable hunting at lower revs/idle.
Eventually cured it by getting a Speeduino, which I did not want to do but has proved to be way better in many ways.
From the mods you have already done I think you will not be satisfied with the stock ECU with whatever chips for much longer, probably better to put your money towards an a/m ecu (and possibly fuel pump!) sooner rather than later.
Tim

I will go aftermarket ECU at some point to help run the 8HP transmission.

i want to swap in but need to be able to get the car to pass California emissions every 2 years so i would like to play with the chip set a bit more before going down that road. i plan to get an ostrich to help tune it.