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hello everyone I have a 97 GMC Sierra with a 305 and electronic shift trans it has a lot of issues that I'm trying to sort out first of all on cold start it idles super low (200- 400 rpms) for a few seconds and then picks up and shudders and shakes for a minuet then goes to normal idle once it warms up it stars to drop to low rpms (any where between 100 to 400) and dies out when I rev it it revs super slow and hesitates when I go to drive it it falls on its face on take off it kinda cuts out at first but slowly and I mean slowly picks up speed all the while it back fires and slightly lunges now once I get moving the trans doesnt want to shift until I let off the gas no matter the throttle position and the speedometer jumps around like crazy and never shows my correct speed the brake and ABS light are on sometimes they go off but normally on look at the videos to see how bad it is any help would be great so far I have replaced the plugs and wires cleaned the cap replaced the button and the TPS cleaned the MAF sensor and cleaned the trans speed sensor videos:
hi, i have a 97 chevy c1500 4.3 vortex v6 that was given to me. It had sat for about a year and a half before i picked it up. When i received it i put a new fuel pump and filter cleaned out the gas tank. It ran fine for 2 or 3 days and i drove 45 miles and it run fine. one day i drove it about 20 miles and it stalled, immediately when it started it would go then cut out again you couldn't go 50 ft without it losing power. The next day i changed the tps then cleaned the aic helped slightly but not much. Well come to find out my catalytic converter was blowing out honeycomb so we replaced it with a muffler since the real muffler had been cut (and no not directly under the truck we piped it out then put the muffler under the bed). It will idle but still wont run correctly i have heard there might be 2 fuel filters i will check that tomorrow. i will also ohm the 02 sensors to make sure the are working properly but they appear to be fine. Can anyone help me?