Rb20det Runs On 5 Cylinders When Hot

[Tree Fitty]

So I just put an rb20 into my s13. It all runs ok other than a bad idle. Except when my car hits about 92 degrees, it starts running on either 4 or 5 cylinders. The hotter it gets the worse it runs.

Would this likely be the ignitior? What else could it be?

Cheers

[GTR-32U]

Coil packs ?

[ashr32]

i have the exact same problem mate, if tried

coils, igniter, plugs, exhaust manifold, pfc, injectors ect,

im looking towards an intake manifold leak and am replacing all the gaskets this week ill let you know.

[White GTS-T]

If you are using all RB 20 gear as in computer, loom, and all sensors etc. I would look at a faulty coolant temp sensor.

[blind_elk]

Old ignitors are notorious for misbehaving when they get hot.

If it is idling badly, try using an ice-pack on the ignitor - see if cooling it down improves the situation.