Redblock cough s when driven fast

[Steerfromdarear]

My 940 coughs or sputters when accepting hard
I've fitted new coil plugs leads cap etc just not the
Ignition Module what else could it be

[Moomoo]

Restricted air filter?

[baggy798]

Boost cut? What chips you running?

It could also be spark blowout.

[Steerfromdarear]

STAGE 3 bijisma chip

[classicswede]

What plugs are you running and what gap have you set them to?

Have you checked the cam timing is correct (front pulley not slipped)

[classicswede]

Originally Posted by baggy798

Boost cut?.

where is the electronic actuator to cut the boost? This is a 940 on LH2.4 we are talking about here not something modern.

What I imagine you are referring to is fuel cut caused by the air flow threshold.

[Steerfromdarear]

I double check the plugs tomorrow what do you recommend

[classicswede]

NGK BPR7ES and gap to 28 thou (0.7mm)

[baggy798]

Technically it is positive pressure ('boost') that causes it to cut.😝

[classicswede]

Originally Posted by baggy798

Technically it is positive pressure ('boost') that causes it to cut.😝

No the air flow meter is on the intake of the the turbo so the sensor does not see any boost pressure. What it sees is air mass