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Showing results for tags '5.7 vortec'.
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1997 5.7 Vortec intermittent slow start revisited. Short version: I have a 1997 Express with a 5.7 Vortec and the CSFI system. It has 130k miles. It is hard to start after sitting. If I pulse each of the fuel injectors with an injector tester then it starts right up. Problem description is mostly in next post. The test procedure that makes it start is in the third post. -
Hello everyone. I have a fun issue. My 99 suburban decided to die on me recently. Was running alright. Went into my parents for maybe 30mins. Came back out it fired up and then died maybe a half second to second after. Never had the issue before. Today decided to attempt to diagnose. It has spark. Distributer looks good. Changed the fuel pump with assembly and fuel filter. Also changed the cam sensor and crankshaft sensor. Lastly changed the ignition switch due to sometimes it acting up and messing with my gauges and transmission. Checked the idle control valve motor. Seems to be working. Clea -
97 K1500 5.7 Vortec Ruff Idle after replacing Spider
OlDave posted a question in Ask the GM Technician
97 K1500 5.7 Vortec Ruff Idle after replacing Spider.... So this all started when the intake manifold started leaking like most do after a while. So i replaced the gasket, as well as the Spider, plugs and wires, all four O2 sensor's, the distributor, rotor and cap. oh and all the seals on the Plenum. I have checked the vac lines and the spider seal. So here is whats going on. The truck starts but has a ruff idle like a miss firing. When i drive it, I get to about 40MPH and it starts really jumping and chugging. It misses really bad. When i get back down to about
