[V8] heat and smell source?

dsaad at icehouse.net dsaad at icehouse.net
Thu Oct 28 09:46:40 EDT 2004

This sounds like something you should get to the bottom of quickly.
Is the heat from one of the cats? Maybe there is a serious fuel mixture problem
caused by O2 sensor, leak in fuel injector or fuel pressure regulator or ??

There are infra-red heat sensor guns that may help you locate the problem. They
may be hard to rent, but big electrical contractors commonly have/use them.

Whatever the cause, you can quickly destroy a cat (or two) and they are
expensive - not to mention the fire risk if the cats are in fact overheating.


Quoting QuickAudi at aol.com:

> Well, here's one for ya.  After having my rack and pump rebuilt/replaced, I
> now have some new problems.  I have a tremendous heat source coming from the
> firewall - feels like walking into a hot breeze - while driving.  This only
> occurs after several minutes at speed, and it never goes away.  Opening the
> windows or running the A/C obviously is a temp solution.  I know that I
> dumped a lot of pentosin on the tranny/exhaust, but shouldn't it have all
> been burnt off by now?
> Secondly, since I had to run my car on four cylinders, I think my O2 sensor
> is toast.  My gas mileage is steadily decreasing, so I'll do the four wire
> one soon.  However, when I increase speed (downshift usually necessary), I
> get a whiff of gas/oil, like it's a mixture of the two.  It usually is a
> pretty constant smell until I cease my acceleration.  I don't smell it when
> accelerating around town, just at cruising speeds.
> Please, all ideas are welcome.  I will have a lot of time to try them out.
> Joel
> '90 V8q
> '86 5kcstq
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