1987 Fiero. I swapped the old 2.8 that spun a bearing for a 3.1 block and crank bored .040 over. I put in a cam that had a lift of .281 - .283 on one of the lobes. (do not know if it was exhaust or intake). The block was decked the heads were gone through by my machine shop, 3 angle valve job, all valves good, all springs in check, new seals. Bottom end completely new. Crank balance and block was line bored with new cam bearings, mains, rods, piston rings. and pistons. Has all new gaskets. Had to make an oil pan gasket and water pump gasket out of RTV because they sent me the wrong gasket set.
Has a new MAP sensor, O2 sensor, CTS, IAT, IAC, TPS was checked on a potentiometer and tested good. I have sprayed propane and acetylene around the engine bay looking for a Vac. leak and didn't find any.

I taped up my entire air filter and the car continued to run but when I taped up the throttle body it didn't. I don't know if having a leak int the filter housing or the black tube is bad but I never noticed the leak with the propane and acetylene just taping everything up.

All my readings look good now on WinALDL except my BLM's to my knowledge. My BLM's are maxed out at 150. This means something is telling the computer it is running lean and to spray more fuel. At high RPM's the car runs fine but at low RPM's it stumbles. It doesn't Idle and it miss fires all the time at lower RPM's. It does run a little better once it gets warm and goes into closed loop but still not like it should by any means.

Are you using the original Fiero ECM and 15 lb. injectors?

I am using the original 87 ecm and 15 pound injectors out of a 91 3.1.

Your computer thinks it is feeding a 2.8, and in reality you have a 3.2. I can't say that is a problem, but other forum members should know the limits of the chip and comment.

Also the FPR is unplugged so it is running at max PSI of fuel pressure.

quote Originally posted by Shonyman32: Also the FPR is unplugged so it is running at max PSI of fuel pressure.

Doing this will confuse the ECM. The fuel pressure regulator should maintain a constant differential versus the manifold pressure. This is to offset the changes of air pressure in the manifold, so when the ECM commands a certain injector opening, it will actually spray a consistent amount of fuel.
If you're convinced that this behavior isn't working correctly, then that should be fixed. Running at a constant fuel pressure, while manifold pressure varies, will lead to inconsistent fuel delivery.

quote Also when at a lower RPM and I push the gas it acts like the accelerater pump on a carb engine is out and the rpm's fall for a second.

This could be a tuning issue. There is an "acceleration enrichment" factor which acts like the pump shot on a carburetor. When the ECM detects that the throttle has been snapped open, it sprays an amount of extra fuel which is programmed in the ECM. This factor would need to be adjusted for the change in your engine size and cam.

Elevated BLMs would result from the engine constantly needing more fuel than the ECM was programmed to assume.

I've never done a 3.2 + cam upgrade, so I don't know if the extent of your issues can all be blamed on ECM tuning, or not. It's an issue, but I don't know if it's the only one. 17lb injectors would at least crudely compensate, but retuning the ECM would still be desirable.

quote Originally posted by Shonyman32: Also when at a lower RPM and I push the gas it acts like the accelerater pump on a carb engine is out and the rpm's fall for a second.

I'm still wondering about the cam being too much for the rest of it, or the rest needing to be tuned to it.
But its really a guess i dont know cam numbers or requirements specifically.