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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Mgizler on September 06, 2009, 04:13:43 pm

Title: Engine/Trans Idle Trouble.
Post by: Mgizler on September 06, 2009, 04:13:43 pm

Ok guys, Im having some trouble with my truck. First off its a 1984 GMC K1500 4x4. With a 350/TH350 in it. All Stock. And it was running fine until the other day I was going up my back yard and hit a large bump, and it knocked it into neutral and started runnign at a very low idle, like it had a huge cam in it.  When I start it up, It idles fine in park, but as soon As I shift it into reverse or drive, it drops drastically. To like 400 rpms. This does not make sense. I checked the timing and its not off. I put new plugs, wires, cap/rotor on and still doing the same thing. I also re adjusted the carb and still no luck. Let me know what you guys think.
Thanks.

Title: Re: Engine/Trans Idle Trouble.
Post by: Captkaos on September 08, 2009, 05:43:21 pm

Check for open vacuum hoses and leaks.