We’re rewarding the question askers & reputations are being recalculated! Read more.
9

The 'floating' intake runners are moved by a mechanism, coupling and decoupling them from the main intake runners to increase the overall length for better low RPM performance. This process was recently discussed here: mech.SE on inlet runner length I don't see that having the extension pieces in the decoupled position would have any effect of the resonant ...


8

This is a variable-length intake Variable-length intakes increase the pressure of the air entering the intake manifold thanks to a physical phenomenon called Helmholtz resonance. It's also known as dynamic supercharging since it avoids the use of a mechanical device (compressor/blower) to boost intake air pressure, which means the air enters the cylinders ...


7

There's a joke in electronic engineering about transistors being invented to protect fuses. Basically, it means that transistors blow faster, and so a fuse is practically worthless for that purpose. It still protects the wiring from catching fire, but not the circuit from functional damage. To protect the circuit from functional damage, the designers ...


5

The problem with hooking up the jumper cables backward is that ANY electronic component in the vehicle is at risk. This could mean the throttle body (TB). It could be an alternator. It could be the computer. Anything can get fried as it looks like the TB was at the mercy. You are trying to force the electrons to go the wrong direction. To electronic ...


5

What exactly is a throttle body? For a gasoline engine, the throttle body (TB) is the mechanism which controls the flow of air into a fuel injected engine. It is the "front door" if you will. Inside of most TBs you'll find at least one butterfly valve. There will usually be a main rod going through the center of the butterfly valve which allows the ...


4

One of the few reasons to change to an aftermarket throttle body is performance. The throttle body is a common bottle neck that may restrict air flow. This restriction comes from one of two places. The engine has had upgrades or some kind that allow it to "breath" better. While the throttle body was not restrictive before the upgrades, now that the engine ...


3

At high RPM and wide open throttle, there is no significant differences between either one. Here a single throttle body might have a slight advantage since you have less turbulence in the intake runners caused from throttle plates and stuff. The biggest, most noticeable advantage you will feel from using ITBs is when you are driving on low throttle or idle ...


3

Yes there is a large benefit of response and efficiency and if not for the cost would likely be seen in more factory equipped vehicles other then the high performance production models (like BMW M3). The combination of independent throttle bodies, plenum and turbo compared to placement of the single throttle body has a direct affect on ready air flow. A ...


2

Hooking up backwards on Toyota of that era would blow multiple fuses including some in the main fuse block, the long strip fuse in the underhood box with a clear plastic cover. A common symptom was that the engine could start but not accelerate and would set codes for the throttle body. I have not seen one that damaged the throttle unit, but it is not ...


2

I eventually got this problem fixed. For an unrelated issue, both the throttle position sensor and air flow meter were replaced on the car. When the same idle sticking issue persisted after that, we figured it was probably indeed a mechanical issue with the throttle cable or butterfly throttle valve sticking. Earlier I had used seafoam to clean out the ...


2

In your other question: What is the effect of the throttle body on the power curve produced by the engine?, I answered the question of what a throttle body (TB) is and it's basic operation. In the answer, I talked generally about how the function of the TB. I point others there so they have a basic knowledge. Back to this question: There are two main ...


1

Considering the metal is coming apart, yes you need to replace it. This is with the thought: Where does the metal go when flaking off? The answer, directly into your engine, where it can cause damage to the cylinders, pistons, valves, and possibly seats. Replacing the TB now will prevent future engine damage.


1

Here you go, It's fairly straight forwards. If you have a funny idle after replacing the parts and it wasn't there before. Recheck for vacuum leaks. If none are found reset the Keep Alive Memory with a scantool. Regarding your code I would try cleaning the IACV, throttle body and resetting the KAM first. Gloves are personal preference. I wear them because ...


1

Check the wiring. If it is a three wire switch check for 5v ref voltage. If you have access to the engine data and can get the tps voltage it should be around 1v. You could also move the throttle and monitor the data with the key on and engine off. Voltage should go from 1v to nearly 5v. If you don't see any change you have a wiring or computer problem


1

Which engine is this planned for? If it is the rover v8, then there is fuel injection already available from the later engines.


1

I find this puzzling. The most obvious way to hook up jumper cables incorrectly is to reverse the positive and negative cables at one of the batteries. That will produce a dead short across the good battery. The result should be quite dramatic with lots of arcing, noise, probably some smoke – but the voltage imposed on the rest of the car should be lower ...


1

It could very much be possible that you messed up your throttle body, could have shorted something out if its electronic, which it most likely is, or worse you could have shorted something out in the cars ecu/computer. Best case scenario would be a fuse, but it doesn't sound like it. But A throttle body at most would be a couple hundred and it usually doesn'...


Only top voted, non community-wiki answers of a minimum length are eligible