Originally Posted by
PhilipA
If you are talking a carby Vitara , I had the same problem .
It would run perfectly when cold but then get a big flat spot.
I had the carby rebuilt with no result, new plugs etc etc .
I then got the manual , and did some research, and I am theoretically sure that it is the EGR valve sticking half open.
The reason I say this is that I sold my house with the Vitara in the garage before I got up there to replace the valve.
So I vote for EGR valve sticking, as it is between the inlet and exhaust manifold and when sticking introduces exhaust gas all the time if stuck.
Regards Philip A
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