Haltech F10 User Manual download pdf (Page 90)

A.4 Idling Problems

If the engine will not idle when cold but will when the en gin e is warm then the coolant

correction map needs to be adjusted.

If the engine idles too fast or too slow, and you are using an Idle Air Control Motor, firstly

check that the Idle Speed Control is enab led, and then lower the target idle setting if

necessary. If not using the idle air control motor then adjust the idle using the idle adjust

screw on the throttle body. Check for any air leaks in the man ifold.

Check the ignition timin g at idle and adjust if necessary .

If the engine surges or hunts at idle then the mixtures and timin g are wrong. Readjust the fuel

maps near idle conditions.

In some circumstances it may be necessary to use the Zero Throttle M ap.

A.5 Lig ht thro ttle and Cruis ing Pro ble ms

If the engine falters under light load then the mixtures might be too lean, check the Fuel

Maps.

A.6 Full Powe r Problems

If the engine gasps under full throttle then the mixture may be too lean. If the engine bogs

down and blows smoke then the mixture is rich. Recheck the fuel maps.

If the maps app ear to be correct then ensure that the fuel pressure is not falling out of

regulation by using a fuel pressure gauge. Flow test and clean the fuel injectors.

In some circumstances it may be necessary to use the Full Throttle M ap .

A.7 Throttle Response Problems

Throttle resp onse of the F10 is set using the three p airs of throttle pump settings. If the engine

gasps and flat spots (misfires) when the throttle is suddenly opened then the throttle setting is

not high enough or is much too high. If the engine bogs down but continues to run then the

mixture is too rich. Experiment with the throttle pump settings to achieve the optimum.

The throttle p ump coolant factor affects the throttle p ump only when coolant correction is

being applied, i.e. before the engine has reached op erating temperature. Set the throttle p ump

increase and sustain figures only when the engine is warm. Wait until the engine is cold again,

and the coolant correction map has been set for good stable running, before changing the

coolant factor.

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Haltech F10 User Manual Page 90