Are there camshaft correlation faults on the GT86?

Are there camshaft correlation faults on the GT86?

One of the most dreaded issues with the GT86 seems to be the camshaft correlation faults, with a wide range of codes from P000A to P0020 this problem can leave your FA20 feeling sluggish. Don’t worry though, many others have had the same issue and it’s not a mystery as to what’s actually going on.

What causes the ECM to set faults on a camshaft?

The reason the ECM sets these faults is due to a discrepancy in the crankshaft and camshaft timing. This can be caused by either a faulty OCV solenoid, misaligned chain, a faulty camshaft sprocket, and sometimes the ECM.

How is the cam timming done on a triumph?

This is done by putting a timing disc (or make a 8″ or 10″ disc) and weld a 1 & 1/2 inch screw bolt onto a spark plug. Put at bottom dead centre and invert modified spark plug finger tight. Turn Engine by hand and spanner, clockwise mark on disc position.

Where is the ECM located on a GT86?

The GT86 ECM is located behind the glovebox trim on the passenger side. You will need to remove the glovebox, and the surrounding trim to access the module. It is attached to a metal bracket and two 10mm nuts hold it in place.

How do you calculate the timing of a camshaft?

The TDC position can be calculated by adding the two figures together and dividing by two. Adjust the timing disc so that it reads zero on the pointer at true TDC. If the head has not been removed when changing the cam, it is still possible to measure the true TDC position.

What should I look for before fitting a camshaft?

Before fitting the camshaft, check that it is identical in every aspect (with the exception of the lobe profiles) to the one being replaced. Special attention should be given to the oil feed positions and journal diameters as variations may occur during the manufacture of the engine.

What makes a Level 1 replacement camshaft good?

Level 1 indicates a good stock replacement camshaft. These profiles are designed to enhance throttle response and low end torque in vans, trucks, passenger cars and mild marine applications while delivering fuel efficient motoring. High vacuum, smooth idle and maximum efficiency are characteristics of these cams.

How is the dwell period of a camshaft measured?

Position a dial gauge to measure the travel of No 1 piston (see right). Turn the crank until the piston is at its maximum height and zero the gauge. You will find that there is a dwell period of approx. 10 degrees where the piston is at its maximum height. True TDC position is at the centre of this dwell period.

Posted In Q&A