Mitsubishi Coupe Range

The first sign of a blocked drainage system in a car is usually wet carpets. This, however, is not necessarily the result of a blocked plenum drain, as there are other causes including a blocked air-conditioning drain, a poor door or window seal and even a hole in the firewall between the engine bay and the passenger compartment.

In the case of a simple hole in the firewall, the solution is usually a rubber grommet which will cost a few cents and will sort things. For other leaks, however, you need to take the time to learn where the drain tubes live and ensure that they’re clear and free of mud or dust that could be blocking them, causing them to overflow into the cabin.

The other possibility is that the leak into the car is being caused by a faulty heater core which is allowing the engine’s coolant to escape. That’s a bigger fix as it usually involves removing the dashboard to access the heater core which then needs to be replaced. But if you’re lucky and it’s a simple blocked drain pipe, the drain holes for both the plenum and the air-conditioning drain should be visible on the firewall, below the windscreen. Undoing them and clearing them would be the first step to curing the problem.

Mitsubishi FTO problems seem to be mainly concerned with the engine’s tappets which can get noisy over time. These are small components in the valve-train that determine the amount of valve clearance (or lash). If the lash becomes too great, the engine will start to sound noisy with a persistent ticking noise that will be worse on start-up.

The problem will surface earlier on cars that have a poor service record as skipped oil changes will accelerate wear in their components. It’s not an especially simple job to adjust the tappets, and many workshops advise to have them replaced rather than adjusted.

We’ve also heard of a few automatic gearbox problems, and these can range from faulty sensors requiring replacement, right up to complete gearbox failure. Again, the car’s service record will be a good indicator of its changes of survival into the future.

Beyond that, the same caveats apply to all performance cars of a certain age: Poor crash damage repairs and electrical glitches that are more annoying than anything else.

It will be one of the following: ES, LS, Exceed, VR-X, or Evo. It’s unlikely that it will be a VR-X or an Evo, which are the performance models. It should have badges on it to identify it as an ES, LS, or Exceed. If not check the id plate. To find the location of the plate refer to your owner’s manual.