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Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 21878
Experience:  BEng, Repaired my own cars and others for 20 years, worked in Formula 1 for 10 years
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Toyota quantum vvti front pipe of the exhaust system

Customer Question

Toyota quantum vvti front pipe of the exhaust system overheating any ideas
Submitted: 1 year ago.
Category: Toyota
Expert:  Matt replied 1 year ago.


if the exhaust is running very hot then its likely to be 1 of 3 things:

1) the exhaust catylst is collasped and blocking the pipe - remove the o2 sensors and try and peer inside to see if the cat brick looks uniform or if its uneven and collasped

2) there's a lack of fuel pressure so the engine is running lean and so very hot - measure fuel pressure on a running engine to confirm

3) the ignition advance is incorrectly set so its very retarded? - unless the van is pre 1998 then there's no distributor to get misaligned

I've rated these in order of likelhood so investigate and let me know