Issues with idle RPM & acceleration once brake is released

10

Asked by Apr 29, 2016 at 10:23 AM about the 1998 Chevrolet C/K 1500

Question type: Maintenance & Repair

Just purchased rebuilt 98 Silverado plus all decked out. I haven't had the truck for more than a week and already having a few issues. Noticed both on my way to work. 1. On my way to work this morning my RPMs at idle seemed very low between 500-700, but it also sounded like it was about to die. 2. I have to force my brake down somewhat, once released my truck will accelerate on its own on stop around 12 mpr. Any thoughts on what the issue could be.

1 Answer

76,335

RPM's sound normal, actually 700 is getting to high. On your other issue, sounds like the brake booster is starting to go. Having to press hard on the brakes is a good indication. This may be messing with the rpms, I would look at this first. Also run some fuel injection cleaner threw a tank of gas.

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