Broke Down in Ft. Morgan -> HIH7

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elk

elk

10 Year
Joined
May 28, 2014
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21
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408
After an 1800 mile drive from Maryland, my truck is sidelined outside of Erlich Toyota in Ft. Morgan, CO.

Filled up the tank at a Sinclair, ran about 50 miles then threw a P0300 code and codes for cylinders 2,4,6, and 8.

Truck lost power then ran really rough. I replaced a coil on the side of I-76, cleared the codes, then restarted. Ran lean, then throw codes again.

I cleared them up again and the truck ran well into Ft. Morgan 10 miles down the road. Asked the Toyota techs to give it a quick look over. They said it ran rough, but reconnected a vacuum hose I had missed in my haste.

Truck ran fun for another 22 miles then stalled out. I had it towed back to Toyota. I'm now in a Super 8 waiting for Toypta to reopen.

The truck starts and runs again, no codes.

Should I replace a fuel filter? I can order one from the O'reilley down the street from the hotel and get it tomorrow afternoon.

Any advice would be welcome!
 
Would a cam position sensor throw a lean bank code and a misfire on the even cylinders?
 
Sounds like you got some bad fuel. Problems starting so close to your last fill up-

P0300 is random multiple cylinder misfire-

Did you post for help in HIH7 thread?
 
@elk Fuel pump going out is my bet. As @abuck99 said probably bad fuel which is what I think killed mine. Same symptoms as our breakdown last year in the middle of BFE New Mexico. Mine completely died, no restarting.
 
For a possible quick fix I would try a fuel cleaner/conditioner and see if it helps. Best case would be to pump out the old and refill with known good fuel.
 
one thing of note, p0300 records only if several misfires occur at the same exact time. page es-166
Once you clear a 300 code it will be a two or three trip detection for cel. If you had no codes for cam or crank sensor, p0340 and p0345 (cam), p0335 and p0339 (crank) then you wouldn't think it, but misfiring all on one side at one moment in time would make me check those first. Aside from the book that says pcv hoses first then fuel, cylinder misfire count, spark, compression, valve clearance yadda yadda
If you need pictures of fsm pages I could email, mostly stuff you couldn't do on the road in the dark. I bet it's something simple though.
 
Sounds like a fuel pump issue. Pump dies when its been running/overheats. Misfires/runs lean when running dry due to fuel pump being out. Will start again after it cools down.
 
I don't think its the fuel, I think it's the fuel pump. Unless you filled up in the deepest darkest middle of now where last gas station on earth that hasn't been used for two years...fuel is not the problem.
My money is on the fuel pump.
How many miles on your truck?
 
Here's hoping. Holed up in the hotel for tonight.

218k miles.
 
Yeah depends on where he filled up. I had just filled up at a small dinky station a mile or two off of I-25 so my emotional reaction was crappy fuel, whether accurate or not. For me the codes didn't reflect the issue. When the engine abruptly dies all kinds of codes go off - which yes fuel lost would cause misfires. I pulled my codes after it died because obviously the dash lit up like the 4th, and they didn't mean anything when the dealership did their troubleshooting.
 
When was fuel filter last replaced? If it is old, simple start point that it probably needs anyway if unknown.
 
I forgot to mention this in my last post. My previous 100 had misfires under load(going up a bridge) only after I've been driving for a while. I changed the fuel pump out with a denso unit from amazon and no problems since.

Btw, I just placed my order with @RockAuto for a denso fuel pump for my current LX470. I hear bad things can happen when running lean under boost lol.
 
I ordered a new pump and filter from O'Reilly but couldn't get a tank seal. It arrives tomorrow by 1:30. I'll try to do an R&R in the hotel parking lot if Toyota doesn't get to it first or have parts on hand.
 
I got bad gas a couple of years ago, All kinds of misfires, bogging down, it was ugly. I was in the middle of a road trip, and was trying to limp home for repairs, so I actually got through that tank, then at the next fill up, everything got better within a mile! No problems after that.
 
Thanks for all of the suggestions everyone. Is it possible for me to replace the fuel pump unit without replacing the sealing ring on the tank? I can't source that at the local vendor.
 
Good luck @elk we drove out from Boston and had to find a shop in Gunnison yesterday to do some work so we feel your pain.

Toyota dealer should be open now - I'd have them at least diagnose the problem. Hope to see you in Silverton tonight!
 
elk said:
Thanks for all of the suggestions everyone. Is it possible for me to replace the fuel pump unit without replacing the sealing ring on the tank? I can't source that at the local vendor.
Click to expand...

Yes just don't let it sit in fuel, it may swell up.
 
Pump and filter found at Autozone. About to R&R in hotel lot. Just going to disconnect the battery and cut a flap in the carpet. Too loaded down to remove seats easily.
 
Just an FYI - it doesn't have to be a gas station in the middle of no where to get bad gas - a local Shell station right on an interstate extra got a bad batch of fuel a couple of years ago and they needed up paying tons of money for repairs. You'd think a busy Shell station would be okay, but just goes to show that if the fuel is screwed when it's delivered, there's nothing you can do about it.
 
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