Question about 2010 Chevrolet HHR
The problem is since I took my car to a dealer i have had this problem with my Throttle jumping slightly forward when i accelerate. I would say it's about 700 rpm. It does come back but not before it aggravates me. In short, it jumps forward and accelerates on it's own it seems.
a clogged exhaust system could cause this. Symptom would be car runs great then can't go faster than a given speed but you can cruise slower with no problems. The its gets worse over time. Always runs good at lower rpm's, then lower, then lower as the exhaust gets more clogged. Have the tech do a backpressure test
Posted on Aug 14, 2009
an evap vent valve malfunction generaly will not cause any drivability issues.
a surge under light acceleration and lack of power could be caused by a fuel delivery problem sutch as a plugged filter or a weak pump. it could be a malfunctioning o2 sensor or even a vacum leak.
without a scan tool to view the engine data and trouble codes, you could be in for a hair pulling experience trying to pinpoint the problem.
Posted on Nov 26, 2009
sounds like your transmission filter and fluid need changed if this is an automatic, if its a standard then your clutch may be starting to slip
Posted on Mar 15, 2010
Tips for a great answer:
Mar 08, 2015 | 2001 Mercury Grand Marquis
Apr 17, 2017 | Chevrolet Equinox Cars & Trucks
Jan 09, 2010 | 2000 Ford Focus
Nov 21, 2009 | 2004 Lexus SC 430
Dec 25, 2008 | Ford Ranger Cars & Trucks
51 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: