ESP failure and car rpm runs automatically between 1000 & 2000 RPM and gas pedal dont work

FORGOT TO SCAN THE PCM I SEE.
check all fuses.?
not told
fails hot and cold engine or both
car must be in transmission DRIVE selected? right?
and foot off gas pedal (accelerator)_ rpm goes to 2000 or up to 6000 rpm . and or
so driving foot off the pedal and RPM goes too high
or in drive, I step on the throttle (gas) and RPM shoots way high
and Never leaves 1st gear. that is transmission failures.
in DRIVE.
if rpm also goes that high right foot doing nothing and in park
that is engine idle control's failing.
we can not see you drive or how. so answers can be a tad hard.
in what gear? PRNDL (choices)
right foot doing what?
and what SPEED is too slow 20 or 85mph? or?
does tranny fail to upshift?

have the OBD read for any fault codes

No,only on carburated engines it,idles down to the set point,on yours,it's fuel injected,pushing gas pedal won't kick idle down,should go down after a certain amount of time,does it automatically,If you start and drive a 5 mile ride and stop at a stop sign,it should idle at it's set point if there's no engine problems,which may be.5 to .7 on your tac.When you normally first start,it will idle between 1000 to 1200 rpm's,don't push on gas,let idle say 15 seconds,put in drive and go.

You have a mechanical bind. Disconnect the main linkage and work it all by hand. Everything should be free and slopy. Aerosol carb cleaner will help, but only when the engine is not running.

The automatic idle speed control system has lost its adaptive idle learning due to the dead battery. To help to correct this in the short term run the engine at 2000 RPM until warm, then back down to 1500 RPM for 3 minutes, then 1000 RPM for 3 minutes, then let it idle for 5 minutes, this should get the system to a point in the idle learn that it doesn't stall out, then drive it for 20 miles under varied conditions of highway and stop and go and low speed operation, that should get all to work again. If you still have problems you will need to have the system scanned to see what is going on that is causing a stall. Also add fresh fuel, gas goes bad in about 3 months. Use the recommended grade of fuel.

that is a possibility. is this a guarantee to fix? if he has done the proper diagnostics and he is guarantee the repair then this would be logical. but no fix no pay. dont let it turn into something else and something else. hope this helps

Sounds like you might have a failing TPS or Throttle Position Sensor.

The part attaches to the throttle body with three torx screws.

Before that, try battery disconnect reset by unhooking the negative battery cable and depressing the brake pedal for a minute or so.

Reconnect and fire it up to see if idle is still high.

check for broken or disconnected vacuum hose/line
also check for the fast idle sped control valve for defect

Hi Deettec

your problem seems very easy :) hope this one work with your envoy. Just buy AC DELCO carburetor tune-up conditioner.

How you use it: engine running , AC off please

1. detached the big black airflow hose which is attached in the mannifold of the engine block.

2. ask your friend to step on the gas pedal and set the rpm steady in 2000 rpm only.

3. then spray vigorously in 8 seconds the inside circle opening of mannifold while your friend steady step on gas pedal with steady 2000 RPM only.

4. after you spray, let your freind continue on gas pedal with 2000 rpm for 15 more seconds.

5. attached back the airflow big black hose to the manifold and you are ready to roll with your AC on.

Hi your problem seems very easy :) hope this one work with your envoy. Just buy AC DELCO carburetor tune-up conditioner.

How you use it: engine running , AC off please

1. detached the big black airflow hose which is attached in the mannifold of the engine block.

2. ask your friend to step on the gas pedal and set the rpm steady in 2000 rpm only.

3. then spray vigorously in 8 seconds the inside circle opening of mannifold while your friend steady step on gas pedal with steady 2000 RPM only.

4. after you spray, let your freind continue on gas pedal with 2000 rpm for 15 more seconds.

5. attached back the airflow big black hose to the manifold and you are ready to roll with your AC on.