2013 Toyota Landcruiser Backfires

JOHNMOHRBELL

MEMBER
2013 TOYOTA LANDCRUISER
V8
TURBO
4WD
MANUAL
85,000 MILES

Since new this vehicle has backfired. Usually on long trips and possibly in warmer weather. When approaching a truck or larger vehicle, to overtake, and accelerating when entering the vacuum caused by the other vehicle, it backfires two or three times. Toyota have been through all the diagnostic codes and had it on dynamiter, but not come up with cause or a fix. I have dealt with diesel motors for years but have never come up with one backfiring?

3 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Is this an induction backfire, if so you need to do a leak down check for a bad inlet valve, that's about all I can think off, or a problem with the EGR system, I also have never come across a diesel that backfires.

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Friday, October 23rd, 2015 AT 4:27 AM

JOHNMOHRBELL

MEMBER
2 POSTS

Thanks for your response. Toyota tell me they checked the valves, and found no problems there. Have a meeting with them next Wednesday so will bring your suggestion up. The problem has been there from new, and a few alterations I have had done have not changed this. One of these is to put a block off plate on the EGR with a 10 mm hole to equalize pressure. I had read up that this could affect the amount of carbon being sent back into the intake, for emission control reasons, but which are not beneficial to the running of the engine. It surprises me the amount of carbon generated in the EGR, which would indicate inefficient fuel burning? Appreciate your interest, and will place more information if useful after my meeting.

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Friday, October 23rd, 2015 AT 2:47 PM

MHPAUTOS

MECHANIC
31,937 POSTS

Thanks for the feed back, am quite interested in the outcome of this one, you do get a lot of carbon build up in the EGR system, basically as the system runs cooler than the exhaust un burnt fuel and carbon deposits combine and condense causing the mess you see, I have seen very dirty EGR systems on near new diesels, I would not be overly concerned about this.

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Friday, October 23rd, 2015 AT 10:13 PM