Question about 1998 Chevrolet Tracker

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Geo tracker won't stay onas RPM drops in idle. Only pressing the gas keeps it on.

HI I have 1997 geo Tracker. When I start it it up rpms drop to down and car turns off. I have to keep the gas going to so it won't stop. Now a few weeks back the motor started shaking real bad. So had new fuel pump replaced and fuel injectors cleaned out. CAr was running smoothly. Now the same symptons are starting to reappear. It starts with car turning off at idle like when I get t oa red light and even turns off at 55 mph. Also I can drive it for like ten minutes stop at a store and then it won't start or it'll start and turn off. Usually takes about 3 to 4 turns before I can get the gas pedal going and keep it on. The key is keeping the car in motion. Well anyways it did all this before before motor started shaking really bad then it would take about 2 or three miles to get it up to 45 mph until it was impossible to even move it. So it starts with the turning off then pretty soon the motor going to start shaking again until it won't accelarate. Put in new motor mounts too. Does anyone know what it could be? Any help would be appreciated. Also new sparks plugs were put in for good measure even though we had them checked out and they were still good.

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Did you replace the fuel pump? if so was it an OEM or aftermarket pump, This happened to me on my van when I thought I would save a few dollars by using an aftermarket pump. I am not sure if your plenum has a test shrater valve. The plenum is what the injectors connect to that feed fuel to them. on this it normally has a valve like a bicycle valve this is where you connect a tester to check the fuel pressure. this is normally 6-8 psi on my car. yours maybe different. If the car is on this pressure should not drop.

Posted on May 25, 2009

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