Customer dropped off his clean 2012 Toyota Venza FWD with a “low power, running rough” complaint. It has the 4-cylinder 2.7L 1AR-FE engine with only 160k miles on it.
Code set is a P0301 – Cylinder 1 Misfire.
Other shops already tried changing coils, plugs, compression test.
They even wired in a NEW PIGTAIL for the cylinder 1 Ignition Coil for some reason.
Let’s take this Toyota for a test drive and try to reproduce the customer complaint.
Problem is this fault is VERY intermittent!! Usually the car drives just fine!
What do we do when the issue is so hard to reproduce?
We still need to give the customer an answer and a recommendation…
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Thinkcar ES401 Automotive Inspection Camera:
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Enjoy!
Ivan
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Im not a fan of snake oil products in general but I think this Toyota makes a strong case for some type of ring seal smoke additive. At some point the oil will take down the converters as well. Its worth a shot, maybe a bottle every 1,000 miles. I don't work for Rislone, nor do I make a commission but I have used the Ring Seal Smoke repair and it worked but every condition is different. Might keep this one on the road for a while. Good work Ivan, you never cease to amaze me.
Hi Ivan i do a lot of toyota honda most times A decel missfire is caused by oil getting oil pulled past valve seals good vid ,the problem with this kind of missfire you cant drive them for 3or 4 hours at 135 an hour most shops dont take on this kind of problem there losers you gave them very good advice coming from a 40year diagnostic tech
After 2 years, Lake Speed finally sold me on the Val R&P. I just started putting in all my clients' vehicles that use 5W-30 or thinner.
probably, the fuel injector in the first cylinder stucks sometimes. its really hard to prove it, so I'd just changed it
I hate jobs like this. It's not fun charging someone my full rate for driving around in their completely functional car.
Thanks Ivan the pista áudio Spani
i cant understand how any one can bring a car in for diagnostics with a quarter tank of gas. i wouldn't waste a technicians time putting gas in a car
I like the piston soak idea and the old Italian tune up
Is something shorting while getting stressed under engine load? How do the motor/trans mounts look?
Lot of respect to sir for his amazing work and knowledge.
Love from india
Good video Ivan. Consumer Reports: The 2012 Toyota Venza’s 2.7L 4-cylinder engine (the 1AR-FE) is largely reliable, but widely known for three specific issues: excessive oil consumption, camshaft timing gear noise at startup, and coolant leaks from the water pump
timing chain rattling on start up. i heard it. vvt will make it worse uphill. thats the problem and oil usage.
Thanks for the video , I recently had a misfire on Toyota Prius during cruising I could not find the root of the caused , swap coil , plug Inyector same cyl misfire.
Some one else (another Technician)shine a light on me , told me he had same issues the intake manifold had some dirty like carbon and that was causing air turbulence, I replace the intake manifold misfire was gone .
I spent lots of time in diagnostic since I do like to change parts as diagnostic steps
I believe transmission programming is partially responsible for this type of issue. To gain maximum MPG, the TCM pushes the transmission to higher gears and lower engine RPM as quickly as possible. This does not allow the engine to warm up completely in the short to medium trips so common in todays driving habits. An "Italian tune-up" keeps the RPM up high and gets the engine temperature up.
a spray bottle with isopropyl alcohol and distilled water sprayed somewhere in the intake and revving it up should clean out the carbon this is an old school trick
Grandpa would say u need to blow the cobwebs out
Do a oil change and use 5-20 cheap synthetic oil add a quart of type F transmission fluid run the car for 1000 miles drain the oil you won’t believe the stuff that comes out and it helps clean the piston rings. I’ve done it several cars and it’s worked. with this car, I would probably wait till it needs a quart of oil put it in run it and maybe do that for a couple oil changes.
This is massively un Toyota like. I've owned about a half dozen Toyota/Lexus over tha past 25 years or so and NONE had anything like this. All went to near 300k without issue before I sold them. If it was me, I think I would just sell it and find another one without the ring issue….
I would think that the no load « misfire » is indicating an issue with the crankshaft and/or sensor (if it is used for misfire detection).
I was a service manager at a Toyota dealer late 80s early 90s. We experienced the same issue. Cylinder cleaning with walnut shells cure the problem. This process needed to be done annually depending on miles driven. Hope this helps.
pour kerosene into the cylinders for 24 hours, change oil for some 0W or 5W 30. Maybe some former owner did use 15W30 and it will glue up rings.
Seem you show only old cases…
I was screaming for R&P as soon as I heard about oil consumption. I had to wait until the very end for gratification.
My 1999 Camry had always run with no issues. After about 65k Miles I had a shop replacing my cam belt and waterpump. After that I noticed some misfires visiting a friend 25 miles away. And only on one particular stretch of the road! After weeks of diagnosing it myself I finally I noticed I got a sensor in my hand after fiddling behind the engine. It was the cam sensor! The mechanic forgot to put the sensor back! I knew I found the problem.
I was at my friends house in the country side, and he knew of a farmer living close by that had many stuff in his barn. I got a bolt that fitted and mounted the cam sensor. This was over 10 years ago. My Camry still runs flawlessly!
i think you just miss a simple problem, if you look on the video spark plug number 4 have a black line marks on the ceramics i think that is the problem , i think you need to pai attention on the all 4 coils to the rubber isolator if its have same line marks as the spark plug
Lucas oil stabilizer and 5w30 did it on my 205k mile Chrysler 2.4 plus a bit a crack juice every tank for the first month I had it car runs taxi service and hasn't had any issues down to one quart every 5k miles no power loss anymore 40k miles like this in 6 months still running