Hey guys. For the last few weeks, my car has been running poorly. It has cut it's gas mileage by almost a 1/4, from 200 miles per tank down to 160. It is very hesitant to accelerate and rev up. When driving it, it almost feels like driving a supercharged car when it comes into boost (but with less power obviously). The car is sluggish when I first hit WOT, but then when I get to 3000 RPM it comes alive and starts to pull. Even then, it still feels like it's missing power, and alot of torque. It doesn't pull hard enough to make me think it's running right, as it's barely over stock IMO.
One possible thing I can think of is my MAF meter. It's a PRO-M 76mm unit with a calibration code for a 93 Cobra. To my knowledge, and after alot of homework, the same MAF that came on all mass air GTs was equipped on the Cobra, so if this ProM cna replace it on a Cobra, it should replace it on a GT. I know Cobras came with 24# injectors, but the computer in the cobra was equipped with different programming, which reinterpreted the signal from a 19#MAF into 24# language.
My mechanic said to look for vacuum leaks, but I can't find any. The motor was torn down three months ago, and the only stock pieces are the block, pistons, rods, rings, fuel rails, and injectors. Everything else is what you see in the sig. I just can't figure out why the car is running like crap and getting bad mileage. I am going to pull my plugs tomorrow, and see what they look like. Also, I am getting a full MSD ignition setup (6AL, coil, wires, cap, rotor) within the next week or so, so maybe my stock ignition could be tired or not able to keep up. Timing is set at 15* BTDC, TPS is .99 volts, fuel pressure is 40 PSI, cylinder compression was 175 when I tested it a few weeks ago, and I run 93 octane gas. Please give me suggestions.
One possible thing I can think of is my MAF meter. It's a PRO-M 76mm unit with a calibration code for a 93 Cobra. To my knowledge, and after alot of homework, the same MAF that came on all mass air GTs was equipped on the Cobra, so if this ProM cna replace it on a Cobra, it should replace it on a GT. I know Cobras came with 24# injectors, but the computer in the cobra was equipped with different programming, which reinterpreted the signal from a 19#MAF into 24# language.
My mechanic said to look for vacuum leaks, but I can't find any. The motor was torn down three months ago, and the only stock pieces are the block, pistons, rods, rings, fuel rails, and injectors. Everything else is what you see in the sig. I just can't figure out why the car is running like crap and getting bad mileage. I am going to pull my plugs tomorrow, and see what they look like. Also, I am getting a full MSD ignition setup (6AL, coil, wires, cap, rotor) within the next week or so, so maybe my stock ignition could be tired or not able to keep up. Timing is set at 15* BTDC, TPS is .99 volts, fuel pressure is 40 PSI, cylinder compression was 175 when I tested it a few weeks ago, and I run 93 octane gas. Please give me suggestions.