I'm new to this site so please bare with me. I've had my saph about 2 years now and it's been fine, but last night it started running like a bag of 💩 boost comes in fine, but then hits 4-5k and starts flat spotting. Wondering if you could help me please? It's still on coil and dizzy, changed plugs leads cap and rotor. It's also had new sensors. Any help would be much appreciated. CHEERS.

 

have you checked for boost leaks?

map sensor ok?

 

Doesn't have a boost gauge fitted by any chance?

 

Did it develop the flat spot before you fitted the new sensors mate?