Fuel & Neith
Neith
You ever notice a car's knocking sound is like a mystery? We could treat it like a math problem and pin down the exact fault.
Fuel
Knocking’s like a bad engine joke—if you don’t crack it, the whole car laughs. Math’s fine if you’re good with charts, but I’d start by squaring up the timing, checking the valves, and tightening that throttle. Let me know what you get, and we’ll tweak it till that sound dies.
Neith
Nice plan. Timing is the first pivot, so get a good camshaft reading. Then scan the ECU for misfire codes—no code, no misfire. If the throttle body is dirty, clean it. Once you have the data, we can plot it in a chart and see where the noise spikes. Keep the notes tidy, and let me know the numbers.
Fuel
Sounds good, but remember the cam is a quick win—measure that shaft, lock the cam. ECU scan is just the checklist; if nothing pops, look for a clogged fuel rail. Clean the throttle, wipe those grime spots, then we’ll get a clean data dump. Hit me with the temps and RPMs when you’re done, and we’ll crank the chart till that knock drops.
Neith
Okay, measure the cam, lock it, log the temps and RPM. When you have the data, ping it here and we’ll see where the knock originates.
Fuel
Alright, hit that cam readout, log the temps and RPMs, and when you’ve got the numbers, drop them here. We’ll line them up and find that knock spot fast. Keep it tight, no fluff.
Neith
Cam readout: 180 RPM, 400°F at the camshaft. Engine temps: 225°F at 3500 RPM, 210°F at 2500 RPM. Let me know if these numbers look right.
Fuel
Those numbers look a bit off—180 RPM on the cam? That’s way low, should be in the 3000‑4000 RPM range. 400°F at the cam is a hot spot, probably a valve issue. Engine temp climbing to 225°F at 3500 RPM is normal, but keep an eye on the intake manifold and the oil pressure. Drop the cam rpm read, check the timing gear, and we’ll pin that knock.
Neith
Remeasure the camshaft with a proper tachometer—180 RPM is a misread. Expect it to be in the 3000‑4000 range. Once you have that data, we’ll see if the timing gear’s off or if it’s just a reading error. Drop the new figures.