Odd throttle response and cuts out at 4k RPM

[Canyonero]

Ok, what sensor is doing this to me? I have all my wiring back together*, but now I'm having problems that I didn't have before. Like some sensor is not connected.

There is a delay in the throttle response from idle/closed throttle, about a half second or so. You can feel it when revving from idle, shifting gears, getting on the throttle after coasting, etc.

Seems to rev up to 4000 RPM fine, but then starts to cut out. Maybe I'll get better gas mileage if I have to keep it under 4000...

*Stripped fuel pump wiring out of 'standalone' harness and started using original relays. Relocated electric fan relays. Getting constant and switched power off original ECU leads (instead of direct to battery and the now unused ignition coil circuit). Routed harness to the glove box where ECU is now located. In the process I cut the fuse block, VATS bypass module, and ALDL connector off the harness for easier handling. Those are soldered back in of course. Added power leads for the HO2S and fused those independently (not from each other, just everything else). Moved tach adapter to engine bay.

[IanSzgatti]

have you inspected all under hood wiring like the TPS? Do you have any MIL light on or anything like that? i'll assume no... since you didnt mention it...

i'll also assume you mean the 4k cut-out isnt the normal rev-limiter for being in park or nuetral? So when your accelerating, it hesitates for a second and then gets to 4k and cuts out? Johhny 5 needs more input!

[Canyonero]

Fixed it. It wasn't a sensor. I had overlooked tightening my DIS base plate. The loose ground became insufficient about 4k RPM.

I pretty much always have the Check-Engine light on, comes on when I'm coasting. I haven't been able to get the code read yet. Guessing it might be an EGR thing, mine has been omitted from the harness.

[bszopi]

If it comes on when coasting, then yes, it is the EGR.

[Canyonero]

That's lame. I would have surely paid the extra emissions wiring fee to not have my check-engine light on all the bloody time. Someday I may add the EGR wiring in myself (I have the original harness to get the connectors out of), but I'm lazy. Is there any way around it? An EGR emulator or some such thing? I'm running OBD1.5.