1996 Nissan Maxima Unwanted Acceleration

1996 NISSAN MAXIMA
50,000 MILES • 6 CYL • 4WD • AUTOMATIC
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CRAZYPAPA
  • MEMBER
  • 1 POST
After engaging acceleration a little bit over 3K RPM at 70 mph at the highway, brake is completely
locked and engine is keep running at the same speed even without engaging accel. I had the same
"deadly experience" two times today at the busy highway. First one was around 5-10 seconds and second
one was around over 30 seconds. After then accel & brake control was back to normal suddenly.

I check floor-mat (OK), and I am suspicious of TPS but I have no clue overall. Could you give me
some advice? Around 4 months ago, I replaced knock-sensor and O2 sensor (rear), and increase the
idle to 800 because car used to stall at the stop sign.
I checked also MAF sensor, but it seems OK. Thank you
May 2, 2010 at 12:13 AM
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ERNEST CLARK
  • ✓ASE Certified Mechanic
  • 1,730 POSTS
  • ASE Certified Mechanic
I'm not exactly sure what you mean. Are you saying that while cruising at highway speeds, you hit the brake but the engine rpm's won't decrease or actually increase???

If so, you may have a vacuum leak at the brake booster. (The big round canister behind the master cylinder) I've never heard of a faulty TPS causing this problem, but maybe that's possible. Also check the throttle cable where it connects to the throttle plate/intake manifold.

It's possible you have a sticking cable.
May 16, 2010 at 4:57 PM
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