strange one.....

So I'm driving down the interstate the other day at about 65mph (I think, speedo does not work.), I happen to know there's a "State-ey" up ahead, I see a car cranking along in the passing lane, so I touched my brake pedal, figure he might slow down cause of the brake lights. Funny thing though, when I hit the pedal my RPM's went up (tach not working either) to the point I could hear the eng. race up.
I tried this a few more times, only does it under load or at a cruising speed, not with foot off accelerator.
Anyone else experience this?

possibly gummed up throttlebody, binding accelerator cable, vacuum leak- like a brake booster, or tps reading incorrectly

I'm thinking maybe vacuum too. Everything else is OK. Couldn't find a vac, leak but it does seem like the most logical thing.

if it is an auto, tapping the brake should knock it out of lock-up

brake booster

Try it standing still. Bad booster should change rpm at idle too.

flht1997 said:

if it is an auto, tapping the brake should knock it out of lock-up

Click to expand...

Yup. The tranny computer has a switch on the brake pedal so it knows to unlock the torque converter when you hit the brakes. You just replicated the usual test to see if this switch is working.