90 Tracker idles, dies above idle

[fixkick]

all 90s do that, its super old now.
never seen any 90s run right , until fixed.
first off the 90s ECu does fuel only so if spark bad, it will misfire or stall.
to cause on all old cars is not doing a full tuneup. #1 for 100 years now.
older the car the more true.
if sparks ok,
then sounds like low fuel pressure, or the map hose is clogged with gunk
is the CEL glowing driving?
its not the TPS, because the TPS can not effect WIDE OPEN THROTTLE PERFORMANCE, ever. THE MAP does that. the MAP and ECU brain calculated air flow then does fuel tables to set fuel injection rates
its not the O2 sensor either its off line accelerated in any way possible.

that is correct 99% of all posts of all forums love to blame TPS for everything and are DEAD wrong
it an old race car with custom ECU that is called ALPHA mode, that only runs engine off one sensor TPS, not in the least like that system long gone and track race only.
the TPS bad causes only tip in power losses and never WOT. the power hesitates then CATCHES UP TO FULL POWER< is NOT TPS caused .

the #1 reason is low fuel pressure.
causes are:
fuel filter clogged, (tuneups do work)
FPR stuck wide open , pressure at 10 psi not 30.
Pump weak or not getting 12vdc to the pump , on 2doors, super common low volts there, you never told door count so......?????


here is key symptoms
If I move the shaft extremely slow, idle increases a bit, then it cuts out.
and if WOT power is gone , its not TPS.
for sure.

do pump pressure next if spark plugs are not 20 years old.