I am looking at getting headers/extractors for my car. What is the sensor on the current stock manifold and can I do without it? Also can I remove the air flow sensor and trick the sensor to alow the motor to still run and operate?
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Re: 91 Hyundai excel
The sensor on the manifold is an oxygen sensor, which I don't believe you can do without, unless you don't mind a check engine light being on all the time and your car burning a lot more gas than it should. The mass air flow sensor is a definite no; this sensor is one of the most important ones in a fuel injected engine. Have you ever tried to drive a car with a bad MAF sensor or broken intake piping after the sensor, it's hardly driveable... Unless you can find some kind of aftermarket engine computer reprogramming/replacement kit (which i doubt exists), i do not recommend this at all...
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P1133 - Insufficient Switching on a Pre-Cat sensor, Bank 1 Sensor 1
Is the exhaust stock? or do you have long tube headers?? The long tube headers cause the heat-up time on the o2s to be longer (causing the switch time to take longer (p0133/p0155)).
Otherwise - insufficient switching of the o2...exhaust leak possibly near the sensor... sometimes a blown head gasket can cause this code too.
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