misfire in all cylinders

60

Asked by GuruDWLV5 Aug 14, 2017 at 06:04 PM about the 2007 Toyota Sienna XLE

Question type: Maintenance & Repair

engine check is on and blinks, runs smooth when 1st starting, and for a few
minutes to 10 min., later after accelerating past 50-60 starts to run very
sluggish. diagnostic reads misfire in all 6 cylinders. has been well
maintained.
225,000 miles. Can the fuel filter be changed? Or do you think it may be
piston/rockers internal timing? This seems to be a common problem in these
vans. If you could please respond with any advice It would greatly appreciate
it.     Thank You Paul.

10 Answers

22,660

I would not drive this with CEL blinking. You will ruin your catalytic converters. Fuel filter I believe is in tank with pump. Is this the only codes? P0301 thru P0306? There generally is another or other codes that when fixed, fixes the other 6 misfire codes. Large vacuum leak causing too much fuel to be dumped into engine? Any vacuum hoses disconnected? Not thinking timing. Runs smooth when first started because a cold engine uses more gas. As it heats up it leans out the fuel on a correctly running engine. You have too much fuel being dumped. Manifold gasket leak? P0170 code? 174 code? Unburned fuel is getting to your catalytic converters causing them to potentially be ruined.

6 people found this helpful.
35,395

Sounds like it's starving for fuel, that will cause random misfires. Check fuel pressure

5 people found this helpful.
22,660

How long has check engine light been on? Months? years? Thinking bad O2 sensors also. I believe you have 4 on this vehicle 2 upper and 2 lower. I own Toyotas and they need A/F and O2 sensors every 80K or so. I have a 2002 sienna that I keep fresh sensors in. It keeps my money in my pocket instead of in converters. I order and install myself. Denso only.

2 people found this helpful.
22,660

Irod: I was wondering that myself if it was a P0300? But blinking CEL is always too much fuel.

2 people found this helpful.
22,660

He said all cylinders not random from his wording. That's why I asked if there was any other codes.

2 people found this helpful.
60

po301 po300,302,303, 304,305,306, and po356, ignition coil F primary. but now it' sounds like clicking and banging inside the head. it's sounds much worse and has barely any power. sounds like something is banging around in the engine. i think its done.

5 people found this helpful.
22,660

I read several accounts of this and they said one coil made it all better. I would take out and do a visual on coil #6 and inside of plug well. You could also replace harness as this is a possible cause. Check resistance on wire before replacing? I would only replace with a Denso part. I did some research on this last night and several have had your experience.

4 people found this helpful.
60

thank you for the info. and your time. I appreciate it.

1 people found this helpful.
22,660

I just recently had to replace my knock sensor harness on my 02 sienna. I did not drive it before fix. I did go ahead and replace both knock sensors and bypass coolant hose while I had it all apart. From codes, a harness will make all them misfire if in a string with other coils and plugs. I had high resistance in my harness and it was due to being down in V of engine with heat. Yours is most likely heat related also. Might sound crazy but have you tried a junk yard with a low mileage wrecked model that you can pull these parts if you think you have catastrophic failure? It might just fix it and you can buy new after you see what it does...

6 people found this helpful.

Your Answer:

Sienna

Looking for a Used Sienna in your area?

CarGurus has 862 nationwide Sienna listings starting at $3,000.

Postal Code:

CarGurus Experts

  • #1
    TLX_4765
    Reputation
    2,050
  • #2
    Mik00000
    Reputation
    1,930
  • #3
    dandyoun
    Reputation
    1,710
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Honda Odyssey
47 Great Deals out of 1,044 listings starting at $5,490
Used Toyota Highlander
31 Great Deals out of 784 listings starting at $6,500
Used Toyota Sequoia
4 Great Deals out of 86 listings starting at $13,989
Used Honda Pilot
38 Great Deals out of 1,298 listings starting at $2,995
Used Chrysler Pacifica
40 Great Deals out of 1,234 listings starting at $14,950
Used Toyota Highlander Hybrid
24 Great Deals out of 333 listings starting at $10,988
Used Toyota RAV4
96 Great Deals out of 2,713 listings starting at $2,500
Used Toyota Tundra
30 Great Deals out of 1,367 listings starting at $6,255
Used Toyota Tacoma
45 Great Deals out of 1,079 listings starting at $9,399
Used Toyota 4Runner
15 Great Deals out of 301 listings starting at $9,995
Used Toyota Camry
62 Great Deals out of 1,074 listings starting at $3,500
Used Chevrolet Suburban
10 Great Deals out of 583 listings starting at $10,900
Used Chevrolet Tahoe
11 Great Deals out of 891 listings starting at $12,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.