Hey all,
I'm needing some advice on an issue that cropped up several weeks ago.
Car starting running weird with occasional stutters and hesitation and poor low speed acceleration, which worsened to backfiring.
I checked the carb over the weekend (Holley 600) and it appeared to be jetting fuel ok from the front 2 nosels. The idle seems to be ok with no noticeable rpm drops or hesitancy that I can detect.
I pulled 6 spark plugs to check for condition and gapping - photos attached. They all appeared generally like this and uniformly gapped at 0.040".
They look fairly carbon fouled which is a sign of running rich am I right?
Am I also right in saying these carbs are sensitive to drops in air temps, I live in Qld but it has been cold so I'm wondering if some adjustment of air/fuel is required?
Motor is late model 5.0.
Would appreciate any assistance to try and fix the issue.
Cheers
Aaron.