I've got a misfire. It only comes in further up the rev range.

The car has a stage three set up with switchable boost between 10 and 23 psi.

When on 10psi the car stutters lightly at around 5500rpm - not very noticable.

When on 23psi the car stutters heavily from 4000rpm onwards - very noticable.


Any suggestions?


My thoughts were;
1. Spark being blown out
2. Crank sensor faulty


Cheers,
Pete.

 

Same old crap..

Plug gap..
Crap leads..
Bade rotor arm or cap..

I'd try leads first.

 

Leads are new.

Plugs cleaned and gapped to 1mm.

Distributor cap and rotor arm new.

 

Also forgot to mention, maybe not related but once the car is up to temp the fans come on and stay on until I switch car off.

 

try 0.6mm

 

Then give the crank sensor a good clean.

 

Cheers. I'll try these on Saturday