Hi everyone,
My issue started on the freeway going around 65mph, suddenly I had a loss of power. It wasn't a full loss of power but it suddenly had no go, along with this there was what I can best describe as a ticking noise from the engine that got quicker relative to rpm (higher rpm quicker ticking noise). In first gear I had no torque at all and second gear was the go to (this was once I got off the freeway and was pulling into a fuel station).
Since that happened I have replaced the spark plugs, replaced the coils as well as the post-cat O2 sensors (these were all things that I had already planned on doing and was hoping it was related to one of these). I checked the code reader and I got the code of a misfire in Cyl 3 now. I am thinking it's possibly a valve issue but wanted to get feedback on what test I should do next and what the best direction to go in would be.
Here is a video (excuse the dust I left the hood open while working on it and somehow it became a dust magnet even though it's in the garage)
Sounds like a valve lifter tick to me.
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You have to hook up a gauge and do a fuel pressure test.
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First thing I'd do is a compression test, followed by a leakdown test. If you can't do it, pretty much any good shop could do it.
But from your description, I'd say you have a dead cylinder. But that's just a WAG (wild ass guess)
No matter where you go, there you are...
Check the oil level? I had a similar sound once and my level was below the markers on the dipstick (stupid me for not checking it more often). Sometimes it's the simple things.
Do a hard reset by unplugging the battery and plugging it back in. Ecu can adapt to a bad coil and keep it from igniting later to avoid catostrophic misfire. Also, i would check the compression specs, and swap the injector to see if it fallos that if the compression test comes out fine.
Thank you, these were the two tests I was thinking of running next based on some research.
Ok thanks, if the compression test and leakdown don't lead to a fix I will try this next.
Yes I was hoping this was the case as it happened but the oil was at the perfect level :\
Thanks I did do a full reset a few times to make sure and it didn't change anything. Will swap the injector when doing compression test and see what happens.
No I didn't miss a shift, it happened under normal cruising speed and load. Thanks going with compression test next.
Ok got preliminary test results back. Low compression on both cylinder 3 & 4, other cylinders checked out fine. Sounding like a gasket issue perhaps but will know more tomorrow. Anybody else experienced something similar?
I lost mine between 5 & 6 too at 145k miles.
No coolant leak, or mixing with oil, or pressurized coolant system. Just a leak between 5 and 6.
As far as head gasket failures go, it's about the best way to lose one.
My guess is if you do the compression test the right way (remove all spark plugs) you'll get zero on the bad ones.
It's not too hard if you can follow directions. That was 90k miles ago for me, and no problems.
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