Runs rich only under load
1990 Toyota Celica

Runs Rich Only Under Load

(1990 Toyota Celica)
I failed my smog test. Mechanic says the only problem is that I'm running rich. After over 5 hours of labor he knows that it only runs rich when under load, not when at idle and he has not found the problem. The things he checked & are not causing this: no check engine light, no diag codes saying this is a problem, o2 sensor is good, timing belt is not off a notch. I get about 25 miles per gallon (he says that's not possible).

What else could cause this problem & am I going to have to pay for all the labor while he is not finding the problem?
1 answer & 0 comments
Popular Answer
on November 24, 2010
i think you need a new tech. the older cars are easier to diag than the new ones. you start with basics, like fuel pressure checks and move on to determine the issue. a good tech can have you an answer with a couple of hours.

Roy
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on November 24, 2010
i think you need a new tech. the older cars are easier to diag than the new ones. you start with basics, like fuel pressure checks and move on to determine the issue. a good tech can have you an answer with a couple of hours.

Roy
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