Question about 2000 GMC New Sierra 1500

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Woul not start this morning had to pur gas in throttle body what's the cause? Have fuel pumping

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Could have a clogged injector.

Posted on Mar 30, 2011

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I have a 1997 isuzu rodeo 3.2L I've checked the continuity on the fuel pump wires they seem fine. No/low voltage on the wires to the pump, (.08 volts when DMM is set to 20). Checked pump after removing the...


You may want to try to see if the car will start while you spray starting fluid down the throttle body. If it doesn't, the problem may not be the fuel pump at all. There is an idle air control valve bolted to the front of the throttle body that can keep the car from starting as well.

If the car starts with the starting fluid, you might want to change your fuel filter. It's mounted under the car near the passenger rear door.

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My 2003 cavalier wont start,it will if you pur gas in the throttle body,is it my fuel pump? the obd2 scanner said system running lean, pressure low.Odd enough the battery wont stay charged, It was parked...


A failing fuel pump is the most common cause of a low-pressure situation. The battery should be completely unrelated; it's either a bad battery or a parasitic draw. Fuel pumps do not have access to key-off batt voltage, therefore cannot cause a parasitic drain. However, there are many things which can cause a parasitic drain. This can be determined by removing the ground cable from the battery and hooking up an ammeter in-line between that cable and the open negative post on the battery. A normal key-off drain is 20-50 mA (to power the clock/ECM/etc...make sure no interior lights are on while your doing this). More than that means there is a malfunctioning component somewhere w/ access to constant battery voltage.

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i would try cleaning mass air sensor, its mounted in air duct between air filter and throttle body, they sell the cleaner at auto parts stores, also as stated bofore make sure the intake pipe clamps are tight and it's not cracked, if that doen't fix it i would investigate a fuel pressure problem either a weak pump or problem with regulator

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