so ive been having alot of trouble wit my car lately... i have a check engine light on and car runs like crap code is PO108 which is high input map sensor. they say check the harness connectors replace map sensor and bad VC1 which i have no clue wut it is.. besides VC1 i did everything and no lucky

plz help

You got this code because the MAP sensor output was higher than 4.7V for more than 2 seconds. If you have any auxiliary electronics tapped into your MAP sensor output, now would be the time to remove it (Apex S-AFC, Split Second VC1, etc). If you don't know what a VC1 is, it is an electronic device intended to limit the maximum voltage output from your MAP sensor, when a turbo or supercharger is added to the engine. It is actually designed to help you avoid the exact CEL you have, but they do break and can be installed incorrectly.

I would disconnect the sensor plug with the ignition switch to "ON". Use a multi-meter to measure resistance between the black/green stripe wire (sensor ground) and a good chassis ground (battery ground wire on firewall or ground wire on top of intake manifold). Resistance should be almost zero. A really high resistance or no connection could affect the sensor's output. Use the multi-meter to measure voltage difference between the green/yellow stripe wire (sensor power) and a good chassis ground. Voltage should be around 5 volts. A high voltage could affect the sensor's output. Use the multi-meter to measure the voltage difference between the yellow wire/white stripe (sensor output to ECU) and a good chassis ground. The voltage should be almost zero. If you get a voltage similar to the sensor power you measured earlier, you probably have a short between the sensor power wire and the sensor output wire. If you pass these three tests, the next step would be to buy a new MAP sensor. If new sensors look too expensive, I've got a used, tested sensor that I would part with for a reasonable price (PM me).

Corbin
'95 ESI-T

Now with more power and fewer leaks



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thank you so some much bro !