Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Hello I’ve been having this 2005 Astro 4.3 intermiten no starts for about 6 months. The van starts and runs great for a month or so and then it just cranks. I notice if I step on the gas pedal repeatedly wile cranking it starts. My fuel pressure is 52 psi with 60 psi prime, and pressure doesn’t drop with engine off. Fuel injector balance test showed equal drop from 52 to 20 on all 6 injectors. I have great spark at the main coil, a little weak spark out the distributor but I consider it good enough. I cleaned the throttle body. Im not liking the fact that i have steady 5 in of vacuum during crank, acceleration, and engine running. Also I have (-) numbers on my fuel trims. And no codes, I have a premium subscription with you, got your book all highlighted and been following your stile for about a 7months rigorously. I purchased a uscope but I’m still having trouble using it. My toughts are I have a bad fuel pump, a bad cap and rotor, a timing issue (distributor related) a bad iac or a bad throttle body. I don’t wanna be a parts Chang monkey (PCM) are there any tips you can share with me based on your experience with Gm
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