Poma's AUTO

29/10/2025

07/10/2025

The catalytic converter isn't just a filter: it works in conjunction with the oxygen sensors (the upper one measures the mixture and the lower one evaluates the catalytic converter's efficiency). When you remove it:

✅ The engine generates metallic noises and harsher exhaust gases because the backpressure in the exhaust system changes.
✅ The ECU receives erroneous signals from oxygen sensor #2, which triggers the check engine light and causes the engine to run on improper mixtures.
✅ Fuel consumption increases and acceleration becomes less smooth.
✅ The engine may lose torque at low RPMs, as it was designed with a specific backpressure range.

👉 Removing the catalytic converter is an option that doesn't really lead to an "improvement." The car will never run completely well because the ECU constantly interprets a fault in the system.

06/10/2025

Today, acceleration control is managed entirely electronically, eliminating the function previously performed by the accelerator pedal. In modern vehicles, the accelerator pedal incorporates a position sensor (APP: Accelerator Pedal Position sensor) that sends a signal to the ECU. This, in turn, commands the throttle body's electric motor to move the throttle valve based on load, rpm, temperature, and other parameters. In other words, it no longer depends on a mechanical cable but on closed-loop electronic control.

For this reason, if the accelerator is pressed immediately upon starting the engine, the signal sent by the APP can be interpreted as an abnormal demand, generating unnecessary stress on the sensor's electronic tracks and the throttle body motor. Over time, this can lead to premature wear, error codes, or even failures in the initial calibration of the throttle valve.

Regarding your question about the TPS and IAC in older models, yes: in vehicles that still have a separate TPS (explained in autoavance) (Throttle Position Sensor) and an IAC (Idle Air Control) valve, the problem caused by pressing the pedal when starting the engine can end up affecting the TPS, as this sensor is directly coupled to the throttle valve and wear is more mechanical. However, in modern cars with a "drive-by-wire" electronic system, the IAC no longer exists as a separate component; idle control is performed by the ECU by modulating the throttle valve. In these cases, the one that may be compromised is the APP (Applicable Control Unit) in the pedal, as it is the first component to receive the incorrect pressure and transmit it electronically.

👉 Keep this in mind, an important recommendation:

Older cars with TPS + IAC: risk of damaging the TPS by forcing it during startup.

Modern cars with APP + electronic throttle body: risk of premature wear on the pedal sensor and problems with the calibration of the throttle motor.

30/09/2025

24/09/2025

When a VVT engine begins to make a knocking or "clicking" noise when starting or accelerating at low RPMs, it indicates that the camshaft advance is not being adjusted correctly. This system is designed to vary valve opening timing to optimize power, emissions, and fuel consumption. If the VVT ​​fails, the engine loses efficiency and mechanical noises appear due to timing misalignment.

The first thing that reveals the problem are DTC codes, usually related to the camshaft:

P0010: VVT actuator electrical circuit.
P0011: Camshaft over-advanced.
P0014: Camshaft over-re**rded.
P0021/P0024: Bank 2 offset.

These codes indicate that the ECM detects that the actual camshaft angle does not match the expected angle.

One of the most common causes is inadequate or degraded oil. The VVT ​​(Variable Camshaft Position Sensor) relies on oil pressure and fluidity to actuate the phasers (variable camshaft timing). If the oil is too viscous, dirty, or not changed in a timely manner, the lubrication passages do not deliver sufficient pressure, and the system will re**rd or advance incorrectly.

The VVT ​​(phaser) actuator and oil control solenoid valves are very sensitive to contamination. Sludge and carbon buildup restricts oil flow, blocks internal pistons, and causes timing misalignment. The result: loss of power, high fuel consumption, rough idling, and even damage to the timing chain.

👉 Follow these recommendations:

Always use the viscosity specified by the manufacturer.

Change oil at the correct intervals to avoid contamination in the lubrication passages.

Check and clean the oil control solenoid valves if VVT DTCs appear.

Confirm the camshaft angle with live data from the scanner to verify that the advance matches the value commanded by the ECU.

22/07/2025

Here are six common signs that your vehicle has a suspension problem:

1. Pulling to one side:
Your vehicle pulling to one side can be a sure sign there’s a problem with your suspension. If one or more of your suspension components is damaged or malfunctioning, such as the struts, springs, joints, or bearings, it can affect your vehicle’s alignment.

2. Bouncing on bumps and dips:
If your vehicle has suspension issues, you may feel nearly every bump and dip while driving. Suspension components like springs and shocks absorb any impacts from uneven roads, so you feel it a lot less in the driver’s seat.

3. One side or corner feels lower:
Your suspension system doesn’t just help give you a smooth ride. It also helps support your vehicle. If one or more suspension components are damaged, such as a blown-out shock or weak springs, you may feel your vehicle is sitting lower on one corner or side.

4. Dipping when braking:
Is your suspension system having issues? You’ll likely notice your front end dipping excessively when braking.
When you brake, the forward momentum combined with your vehicle's weight sends a lot of force to the front end of the vehicle. A bad car suspension can cause all of that weight and force to push the front end downward.

5. Difficulty steering:
The steering system is directly tied to your vehicle’s suspension. If something in the suspension system goes wrong, you will likely feel it when you steer. You may notice your vehicle pulling to one side, for example.

6. Rolling to the side when cornering:
Similar to dipping when braking, your vehicle may roll to the side when you corner with car suspension issues. Without the right support, the weight of your vehicle can shift more dramatically when you turn, making it feel like your vehicle is rolling to one side.

If any of these bad suspension symptoms sound familiar, it’s time to bring your vehicle to your nearest mechanic for expert repairs.

20/07/2025

Antifreeze, also known as engine coolant, is critical in protecting your engine – and not just when it’s cold out. Antifreeze has three primary functions:

Lower the freezing point and raise the boiling point of liquid in the engine to prevent both freezing and overheating.
To reduce the risk of rust and corrosion on engine components.
To absorb heat from the engine and transfer it to the radiator, where it’s more easily dissipated.

Antifreeze colors can vary, but here's a breakdown of some common ones:

- *Green*: Typically indicates Inorganic Additive Technology (IAT) antifreeze, often used in older vehicles (pre-2000s). It's usually changed every 2-3 years or 30,000-50,000 miles.
- *Orange*: Usually signifies Organic Acid Technology (OAT) antifreeze, designed for modern vehicles with aluminum and nylon components. It can last up to 150,000 miles.
- *Red, Pink, or Yellow*: May indicate different types of OAT or Hybrid Organic Acid Technology (HOAT) antifreeze. Always check your owner's manual for specifics.
- *Other colors*: Can represent various formulations, so it's crucial to check the label and owner's manual to ensure compatibility.

It's essential to use the correct type of antifreeze for your vehicle, as mixing different colors or types can lead to compatibility issues and potentially damage your engine.

16/05/2025

16/05/2025

16/05/2025

Dankos!