r/mechanic

Chevy 6.6 Gas engine

2021 Chevy 2500 6.6 GAS engine. Dead misfire on cylinder 6. Swapped Coils, plugs, wires, fuel injector, checked compression, running compression, valve springs are fine etc. All the normal issues. No ticking just a constant misfire on cylinder 6. I have spark, I have injector pulse??? I’m at a loss. Anyone seen anything stupid like this? Thanks if anyone has anything.

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u/lmZen — 8 days ago

2014 Toyota RAV4 2.5L 4-Cyl - Single click/no crank after new starter install

The car initially only clicked and wouldn't crank. Assuming the starter went bad (it was last replaced ~2 years ago), I installed a brand-new starter.
After hooking everything up, the engine cranked for about 5 seconds on the first try before I released the key. On the second try, the starter reverted to making a single click sound and won't crank at all.
help plz

u/greybackspace — 8 days ago

4.6L 2V intermittent misfire turned into severe shake/stall

shop says 40-70 PSI compression on multiple cylinders & demands replacement. Slipped timing or fuel wash?

two weeks ago, my 2006 Grand Marquis started to idle rough while in a drive thru, like it was about to turn off, but stopped after 5-10 seconds. Then a few mins later as i was wrapping up at that drive thru and accelerating to leave, the car hesistated for a brief second then was normally picking speed after. This happened maybe 3-4 times since then. Then yesterday, I started the car up to go to class, it was fine but on my way back later, when I started it, it had a constant, severe misfire, stalling at stops, and heavy engine shaking. A shop scanned it and traced the primary issue to Cylinder 2, but when they pulled the coil plug, the rough idle smoothed out slightly. They performed a compression test and found 40–70 PSI across multiple cylinders, said the car was running on 7 cylinders, immediately declaring the motor dead and recommending a full replacement. However, the engine has no heavy knocking or rod knock (it just has a full exhaust so it sounds a bit like it’s knocking in the video but it’s not), it sounds like it's running on fewer cylinders. Before replacing the engine, could this be something smaller?

u/Ok_Hotel_1883 — 8 days ago

Lost cause or fix it up? (2011 cruze 1.8L)

Needs at the very least

New Outer Rockers both sides

New Brakes, Rotors rear.

New Wheel Bearing

New flex pipe

About $700 in parts

I'm assuming it needs the new back plates in the rear near the brakes? The center is rusted out and I can see daylight through it, I'm assuming that's where the wheel bearing sits? Anyways I can't seem to find that part anywhere.

If I could get all the parts for <$800 and a labour rate of $60 ($40 US) an hour for everything but the rockers is it worth fixing?

u/lazyrabbit94 — 8 days ago

'24 Hyundai Santa Fe PHEV Scraping Sound

We've had our 2024 Hyundai Santa Fe Plug-in Hybrid since 2025 and for some time we've had brake squeaking. Hyundai were taking forever for an appointment so we took to our local mechanic who promptly replaced the brake pads in May. Shortly after the replacement, the brakes started squaking agian, and the mechanic said to book in with Hyundai who need to look at it which is now set for November 3. The brake only squeaks when we are at the final portion of the brake when the car is slow and close to stopping. It may be worth noting that the car also groans / creaks when we accelerate or decelerate the car from a starting position.

THEN, while driving tonight we start hearing scraping sound, I tried to capture on video. What is this?

What should I do?

I am not a car person so your help is greatly appreciated.

Never buying a Hyundai again.

Hyndai Santa Fe 1.6 T-GDi 13.8kWh Ultimate Auto 4WD Euro 6 (s/s) 5dr (7Seat)

u/japancakes — 8 days ago

Twingo exhaust leak

2015 Renault Twingo Play Sce - 999cc
I have a large exhaust leak in the manifold catalyst converter area, dealership trying to charge 4k for a new converter. Anyone know if this is a relatively easy thing to fix especially with the engine being in the back of the car so is the exhaust more complicated? Any help is appreciated.

P.S - the vvt solenoid has been fixed, only issue now is the exhaust and acceleration on hills due to this.

u/Salt-Horror-8567 — 8 days ago

What is this sound

2021 Silverado 1500 Custom,2.7L Turbo, 86,472MI

Im trying to figure out what this sound is and what it means, i am not very good with vehicles and wondering if i might have to go file a warranty claim with the dealership who sold me the truck

u/Little-Lingonberry-7 — 8 days ago