Question about Cars & Trucks
Have replace throttle body control and pedal sensor
Check your fuel pressure at the injector rail. This can point to a bad pressure regulator or fuel pump. You could also have tripped the limp home mode with a cause to be determined. If the engine is overheating or a wire is indicating an overheating condition, the mode will trigger.
There are other parts which can cause performance problems, but many will trigger a "check engine" light.
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Posted on Dec 30, 2012
Yes the throttle and pedal sensor can do this, but doesnt reduce power,Your cam postion sensor reduces power and if you thing it gives a engine code,it doesnt have to,This sensor is back up by the crank position sensor,The location of this sensor is in the back of the cylinder head
Posted on Dec 30, 2012
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Posted on Jan 02, 2017
SOURCE: 1999 volkswagen stalled
first check cylinder 1 , spark plug, ht leads, coil,
then clean the trottle body with carb cleaner
if that does not work replace the throttle body, comes complete, and do a basic setting on it with diagnostic machine
Posted on Feb 19, 2009
turn the key to the on position a see if you can here a buzzing sound around the fuel tank,if you don't hear a sound then. (be very careful while doing this) with the key off take a fuel line coming from the tank loose,make sure its pointed away from you and turn the key to the on position,see if any gas comes out,if not then your fuel pump is probably bad.
Posted on Mar 05, 2009
sensors on the pedal?? not sure what you mean by paddel though never heard of this term before
Posted on Dec 14, 2009
Testimonial: "03 Envoy:My reduced engine power keeps happening. My car goes 20 mph. Changed throttle body, pedal, wiring. Need new thermostat. Car not heating up."
$900? $850? You could get a new engine for that price.
If the car has this condition only when it is very cold then I suspect that during that time it is operating in a condition controlled by an engine temperature requirement. When it is cold enough it will continue to run the fuel management in what is called "open loop" mode until it is warm enough. It needs to be warm enough to allow the oxygen sensors to properly read the oxygen level of the exhaust gasses and send that information to the computer, which will then calculate and command the proper air to fuel ratio. The other important reason is that the exhaust gasses must also be hot enough to activate the catalytic converter contents to break down the combustion byproducts, which is about 650F. When it reaches the minimal operating temperature requirement, the fuel management program then switches to closed loop fuel control...at that point emissions are the least and fuel economy is improved.
A new throttle body will not solve that problem. A higher temperature thermostat or a higher coolant to water ratio will help.
By the way...a throttle body for your car is no where near $900...not even half of that with even the MAF sensor included and that's $150 by itself.
Posted on Jan 10, 2010
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Oct 20, 2016 | GMC Cars & Trucks
Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
Forced idle mode--The control module will perform the following actions:
Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
Ignore accelerator pedal input.
Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.
Powertrain Control Module Description for the 4.8L, 5.3L and 6.0L engine
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