Rough Start Up - Engine Sputtering Video

Hello all, has anyone experience engine sputtering when starting your vehicle? For the last week I've experienced it pretty regularly when the vehicle has sat for over an hour. Some are short occurrences like in the videos below, and others quite a bit longer. Once the truck warms up it will usually crank without issue.

17 TRDOR Auto





Update: Dealership said after software update they couldn't replicate again; Video below a few hours later



Final Update: Seem to have fixed the problem by installing new injectors. Find the parts list below.

 

https://www.tacomaworld.com/threads/tacoma-4-0l-hard-to-start-when-warm.501037/
Yes. mine does the same thing.
If you find out why let us know.

 

Thanks for the heads up on your post. I'm going to try and get by the dealership this week to see what they have to say about it. Just rolled 10K miles and started to hesitate shortly after. Reading your thread it looks like people have tried several fixes without much success. I hope it's not one of those deals where the dealer can't diagnose the problem.

 

almost sounds like a diesel starting

 

Mine did this a few times when cold and parked on a step incline. Had the CPS, and Hpfp replaced by the dealer and havent had the problem since.

 

Third gen problems aside, it looks like you're not getting any fuel...

 

This whole thing reminds me of the common problem the 6.0 power stroke engines have when they crank for a really long time when warm.
Apples to oranges but that originates from faulty fuel system components.

 

That's not normal? Mine does it all the time. Figured it's just another Turd gen problem aka "normal for the vehicle"

 

Yeah my thing starts right up.

 

Back again with Smitty on FB live from the dealer waiting room

 

Sounds like low fuel pressure.

 

CKP is one of the things that can cause this...

Since it's a cold start problem, I'm going to go with a leak in the EVAP causing unmetered air to enter.

 

That sounds like a fueling problem. Pump, pressure regulator, injectors. EVAP system should have multiple solenoids that would all have to fail at once to create an inlet for unmetered air. Given the very slow nature of the start, sounds like fuel is trickling in. Our HPFP is only working with the cams rotating so it's not building enough pressure to start, so the pump in the tank should be priming the system. That one may be bad.

The indication that it happens after sitting for an hour is also indicative of it being problematic after fuel pressure has been bled from the system.

 

She's sitting at the dealership... now the wait.

 

Well, us younger guys don't typically have a problem getting things started

 

Similar to my issue... See the ever infamous "sand in gas tank thread"


I also got a recall on the crank sensors...

 

def sounds like low fuel pressure / clog perhaps? or a cps.

 

Hopefully they get the issue figured out and fixed

 

...not sure if being sarcastic but no it's definitely not normal.

 

subbed, in for the results.