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5

In addition to Zaid's answer. VTEC - Variable Valve Timing and Lift Electronic Control) In essence, it selects between two different cam profiles depending on the RPM. Here's an animation - This is how a cam controls poppet valves. Read about cam profile here For volumetric efficiency we want the intake stroke to fill the cylinder with the max - ...


4

This diagram does a decent job of explaining VTEC: In a nutshell (paraphrasing the Wikipedia article), you have two cam profiles, one designed for low-RPM operation and fuel efficiency, the second (taller cam) for performance. The ECU decides when to select which profile based on several engine parameters by actuating the locking pin that runs through ...


4

The oil pan is not a normal wear item, however being so low to the ground it is possible to damage it. As the oil pan is not removed for regular inspection, any decision made by the mechanic should be visible to photograph without tools or disassembly, either as physical damage or oil leaking. Have the mechanic put the vehicle on the lift and show to you ...


4

I would check for: cracks, but don't take casting marks for cracks (a picture of your pan would be helpful to tell) scratches stripped plug thread (but then it would already be leaking since you wouldn't be able to tight the plug back ;-)) any deformation especially on the gasket level


4

Background This is a common issue with shim and bucket valve trains. As the valves are getting worn into the head a small groove is beat into the valve face after opening and closing so many times. As the valve pushes up into the head it takes up clearance between the cam lobe and the bucket which the cam lobe depresses to push the valve in and open it to ...


3

That's the air intake resonator housing. Looks like the image is a still from a YouTube video


2

Exactly what @Movemorecommentslinktotop said in his comment ... if the rear rotors, there is a second braking surface inside the rotor "hat" which is for the e-brakes. If you haven't backed these shoes off or if you have the e-brake on, you'll never get these off. The front brakes may be rusted around the hub and are not releasing. They can become "space ...


1

The easiest way to replace the DLC port is to find a vehicle exactly like yours (or even a close relative) and cut one from it. Then splice the "new" DLC port into your wiring, if you can find the point at which it was cut from the car. This would be an OBDI port you'd be looking for. If you do go this route, take as much wiring as you can get a hold of ...


1

If by "generic" you mean OBD1 or OBD2, the answer seems to be no according to this website. On another web page the table indicates that it is "OBD0".


1

As noted in the comments, it can be difficult to diagnose from very little information. However, some things worth considering: Disk brakes have one or (more usually) two springs between the brake pads and the calipers: the pads move along these springs when in use. If they have been installed in an incorrect position (or even omitted - have seen that), ...


1

I had a similar issue on my truck. What I found was the caliper was not moving correctly and the pad was wearing unevenly. One side of the caliper was stuck, so was causing the issue. For my truck, there is a rod which the caliper attaches to. This rod had rusted and was not allowing free movement. This caused the brake pad to wear unevenly and cause the ...


1

A surging idle indicates a vacuum leak on the intake. You could have a leaking vacuum line (did you forget to plug something in?) or your intake gasket may not be sealing. Like Vince pointed out an hour ago, a bad Idle Air Control Valve (IACV) could also cause this. Since it was not doing it before your engine work, my guess is the IACV is fine. With the ...


1

I drive a 2014 Civic EX coupe, automatic, and about a week ago turned the Econ button off... the icon light on the dash turned off. I bought the car several months ago and it didn't occur to me until now to try this. Performance has been about the same, but my mileage has actually INCREASED 3-4 MPG! Go figure.



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