GX460 Stalls Randomly, No Codes (1 Viewer)

[kbahus]

Curious if anyone here has any experience with an odd stalling issue. My friend's 2014 has been randomly dieing while going down the road. No fault codes stored and it restarts everytime without issue. Lexus put in a new alternator and battery but it has continued to stall after. Fuel pump was replaced about a year and a half ago under recall. This truck has had a non-disclosed engine replacement prior to purchasing, Lexus noticed it while putting in the alternator. Drive and runs normally otherwise. Any ideas?

 

[r2m]

Does it start up right away after pulling over or does it have to cool down.
Also reading the "non-disclosed engine replacement" and having this issue, I'd get rid of it and get another.
Let someone else deal with it.
Oh, wait, then they'll be on this forum asking the same question!!
Or maybe it was someone on the forum that previously had this vehicle and couldn't get it answered on here and got rid of it. Now you're friend is the new person posting!!
Starting to sound like an episode from Outer Limits.

 

[steampowered]

I had the same issue. GX*Bob's video on cleaning the MAF and throttle body solved it for me. 2010 with 150k on it.

 

[Rednexus]

Could be a loose connection somewhere related to the fuel pump or engine replacement. TBH, it will be difficult to troubleshoot, and may require a OBDII reader with datalogging capabilities (to see what sensor etc. gives out).

 

[mantutuli]

Dirty fuel filters causes this issue on all cars

 

[windnsea00]

Dirty fuel filters causes this issue on all cars

US Spec GX460's don't have fuel filters, just a mesh piece at the fuel pump.

 

[mantutuli]

US Spec GX460's don't have fuel filters, just a mesh piece at the fuel pump.

interesting. I've never known a car not to have one. how do you clean it if it gets clogged?

 

[windnsea00]

interesting. I've never known a car not to have one. how do you clean it if it gets clogged?

It's not uncommon for modern cars to have no fuel filter (gasoline). I'm not sure if they ever get clogged since it's a mesh net, not a filter.

 

[mantutuli]

It's not uncommon for modern cars to have no fuel filter (gasoline). I'm not sure if they ever get clogged since it's a mesh net, not a filter.

This is just theoretical/academic - fuel filter get/got clogged because of sediment in your tank(think rusted gas storage tank, which is why they leak, or the inside of your gas tank rusting). With a mesh screen, that sediment is still going to end up against that screen, which is stopping it from ending up in your injectors. Over the course of enough time, I would think it would have to get built up enough to a clog. My Mercedes has a fuel filter canister the size of beer can, and it clogged enough to cause starting issues.

Google fu says "The filter might be in the fuel tank on newer vehicles as part of an integrated fuel pump assembly and gets replaced only when the fuel pump needs replacement"