Loss of power when driving

Could be map sensor

You didn't mention what sort of car you have.
You can try disconnecting the electrical lead on the MAP sensor. Then give the car a test drive.

A faulty MAP can cause high emissions, erratic running and high fuel consumption.

You can also try cleaning the EGR - the exhaust gas recycler valve.

It's strange that you have no fault codes. There is no check engine light illuminated?

run the fault codes and look for a problem area in the vane actuator of the turbo
it could be a sensor problem or a MAP sensor problem
this is indicated by the pressures being generated or not generated by a turbo generating pressure from the throttle opening on acceleration or held at constant speed

That code is fora MAP sensor. Manifold Absolute Pressure. Could be loose connections, wiring corroded, or sensor just old an worn out. Replace an clear engine code. Common easy fix

this is a toy forum? , you might try ford for better answers.....?

iCON, you mean IKON< right?

HOT and cold engine,
Is hot idle speed RPM right near 800 and steady,not racing fast?

power loss, is the CEL lamp glowing running, yes,scan it.
post engine type exactly. one of these?
1.3 L I4 (petrol)
1.6 L I4 (petrol)
1.4 L I4 (diesel)
1.8 L I4 (diesel)

so its the first 2, as you said, coil, so its a GAS engine.
power loss, do the 60k tuneup
clean the MAF, sensor. if it has one. ask how. first.
does engine power return , at wide open throttle, held? up hill?
yes/no
if no, weak maf, air leaks or low fuel presssure
if power loss is only brief, then bad TPS.
my guess this engine, is MAP based, no MAF,
if so, then clean the nipple on the MAP sensors.
make sure its not clogged .
If the map works ,any air leaks cause fast idle. and FULL POWER>
so id bet the power loss is from low fuel pressures.
that is why i ask for WOT power up a hill, hot, got that.
if just tip-in power loss (recovers) that is a bad TPS.
the do wear out. easy, at 100k.

there are 2 EFI systems, which one yours has im clueless but can fix both , easy. (maf or map based) aka. air /speed density systems.

could be fuel filter clog.air filter or MAP sensor or an intermittent speed sensor on the transmission

Test accel pedal pos sensor and tps. Procedures at link below.
Repair Guides Components Systems Accelerator Pedal Position Sensor...

You are a 1990 Oldsmobile sihouette with a 3.1 these vehicle are speed density in other word you are equipt with a MAP (manifold air pressure) when this sensor fails you loose the ability to accelerate or hesitate as you accelerate make sure the vacuum hose is connected to it and it is no leaking vacuum if the hose is okay and it is electrically connected correctly your fix is to replace the MAP sensor

map sensor is bad or fuel regulator

possibly replacing the MAP sensor