vernal cloud
Hey everyone,
I’m having an issue with my 2008 Saab 9‑3 2.0T (B207R) and could use some advice. Here’s what’s going on:
Cylinder 3 gives consistent misfires at low RPM / idle.
Misfire stats for cylinders 1–4 after 2 days of driving (after clearing): 14, 3, 520, 12
Happens on both gasoline and LPG.
Coils have been swapped between cylinders 1–3, but the misfire stays on cylinder 3.
New NGK plugs installed.
I can feel misfires at idle. The misfire count doesn’t rise while sitting at idle, but when I give it a little gas and let RPM drop back to the idle region, the count goes up by ~4–5 each time.
Haven’t noticed any oil or coolant loss.
Turbo spools quickly but only reaches about 0.45 bar. (Should be 0.9-1.1 in this version)
I can also hear a hiss of sort, near the vacuum pump, but no oil leaks. (https://www.youtube.com/shorts/59VFrnn6C10 basically the same stuff but no answer there lol)
The engine is fine while cold, problems start at hot engine
ECU doesnt show any codes, regarding misfires or anything at all really
Basically, misfire only happens at low load / idle, cylinder works fine at higher RPM.
Has anyone experienced something similar on a B207R? Any tips on how to quickly narrow down what it is?
Thanks!
crimson hill