Looking for some advice on MAF/TB combinations.
I have a 1998 Mustang GT 4.6 (2V).
Mild mods : MAC CatBack Exhaust, Power Pulleys, Modded Stock MAF, 70mm TB, Superchip, MSD Ignition, Taylor 10.5mm wires, MAC Cold Air Kit (w/ K&N in fenderwell), Tokiko Full Suspension.
It all started because I had some "surging" at idle and some loss of power. I completed a tune-up. I changed spark plugs (Bosch Platinum 4+), Fuel Filter, MSD Coils and Taylor Wires (just installed today), changed the IAC, cleaned the K&N filter. Car was running a lot better but still had a very little hickup at idle (a little surging). I upgraded to a Pro-Flow 85mm MAF (I was told by their tech support that it works very well with my setup). I can definitely feel the power increase (it is very noticeable) ... but ... idling is HORRIBLE. My surging problem is very bad and I am constantly getting the P1071 and P1074 DTCs. Bank too lean and MAF Intermittent Circuit errors. Mid to Top End is AWESOME. Idle ... forget it. As soon as I disconnect the Pro-Flow MAF idle goes back to normal. My MAF was specifically calibrated for my setup (including the MAC Cold Air kit). I went back to the stock MAF and everything was OK. Any suggestions ? I read a lot of other postings on these issues. Could I have a bad MAF sensor ? When I reverted back to the stock modded MAF (with a cut post) everything is fine (no DTC errors). I have an ODB-II software with a laptop so I can pretty much see the values for all sensors in real time. BTW, TPS is new and holding steady at 0.96V at idle. Any suggestions ? Much appreciated.
I have a 1998 Mustang GT 4.6 (2V).
Mild mods : MAC CatBack Exhaust, Power Pulleys, Modded Stock MAF, 70mm TB, Superchip, MSD Ignition, Taylor 10.5mm wires, MAC Cold Air Kit (w/ K&N in fenderwell), Tokiko Full Suspension.
It all started because I had some "surging" at idle and some loss of power. I completed a tune-up. I changed spark plugs (Bosch Platinum 4+), Fuel Filter, MSD Coils and Taylor Wires (just installed today), changed the IAC, cleaned the K&N filter. Car was running a lot better but still had a very little hickup at idle (a little surging). I upgraded to a Pro-Flow 85mm MAF (I was told by their tech support that it works very well with my setup). I can definitely feel the power increase (it is very noticeable) ... but ... idling is HORRIBLE. My surging problem is very bad and I am constantly getting the P1071 and P1074 DTCs. Bank too lean and MAF Intermittent Circuit errors. Mid to Top End is AWESOME. Idle ... forget it. As soon as I disconnect the Pro-Flow MAF idle goes back to normal. My MAF was specifically calibrated for my setup (including the MAC Cold Air kit). I went back to the stock MAF and everything was OK. Any suggestions ? I read a lot of other postings on these issues. Could I have a bad MAF sensor ? When I reverted back to the stock modded MAF (with a cut post) everything is fine (no DTC errors). I have an ODB-II software with a laptop so I can pretty much see the values for all sensors in real time. BTW, TPS is new and holding steady at 0.96V at idle. Any suggestions ? Much appreciated.