At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
Ac compressor will drop the rpm by about 350 -450 rpm and this is compensated for by the CPU which increases the fuel setting to maintain constant rpm. Run fault codes if there is a problem
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Carb?
Each barrel will have its own mixture screw.
with engine running, slowly back out. Rpm should drop. Slowly screw in. Rpm should increase, then drop. Back out to peak rpm then another 1/3 turn. Do screw for each barrel.
Check all fluid levels, check your air filter to make sure it isn't dirty... if that doesn't help go to a mechanic... could be anything from air getting into the line to a fuel line going too close to the manifold and boiling the gas, to electrical
Turbos wear out regularly, they are a high maintenance item and have many precision and auxiliary parts. You need to check the boost pressure and the wastegate.
sounds like a faulty secondary air system or cannister fault.
Check the air cannister and/or charcoal cannister for damage.
Check for damaged or burst air hoses.
Do you have standard environmental controls or are they of the digital type for one? As far as the RPM's dropping hard, you can have a dry compresser. try a can of " R134 with oil " sounds to me that if all this just started happening with the HOT air and the engine rpm's dropping. you may heve a leak in the system, and if you continue to run it you can cause sever damage to the compresser.
The "Tachometer" is the gauge that indicates the engine RPM. It is not unusual for the idling RPM to drop slightly when the air conditioner comes on. The air conditioner represents a fairly large load on the engine so when it starts, the RPM will drop slightly. When driving, you'll probably not even notice that the air conditioning is a load on the engine unless you're accelerating uphill, pulling a trailer or passing another vehicle while the vehicle is fully loaded. At idle, the Envoy's computer should detect the falling RPM and make adjustments in fuel delivery to bring the RPM back up.
In any case, it shouldn't be cause for alarm, unless the air conditioner is stalling the engine. If this is the case, you are probably in need of service. The issue of low cooling from the air conditioner while idling in gear (as is the case when stopped in traffic, etc.) is correctable free of charge at the dealership on certain vehicles as a result of a recall. Your dealer can tell you if your vehicle is affected or if there is other recall work pending on your vehicle based on the VIN.
×