Question about 2003 Chevrolet Impala
When I start my car a whining noise starts and when I put my car in drive the noise gets louder..When I'm on the interstate the car beings bucking and hesitate when I start to accelerating this only happen when I'm going 70mph or higher or use the cruise control. The car seems to have a hard time shifting gear when I'm on the interstate as well... the car only has 88,500 miles on it.
May have a cylinder misfire
Have a shop check it out
Go for a road test & go along, to explain
& duplicate the problem
Posted on Dec 09, 2012
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Posted on Jan 02, 2017
It sounds like you may have a problem feeding the fuel to your engine, I had the same problem with my 89 RS. All the 1989 model's fuel systems were recalled. I think you may need a new fuel pump. The fuel pump is located inside the gas tank in the rear of the car right under the rear axle. The fuel pump itself isn't too expensive, but with other small parts such as the electrical harness upgrade and fuel filter and the labor you should be looking somewhere in the $500 range. I hope this helps.
Posted on Jan 12, 2009
SOURCE: Chevy venture 2004 Transmission
Bring to tranny shop or repair shop, have it scanned for trouble codes, many electrical parts and solonoids in those trannys, possible it may just be a shift solonoid bad or needs adjustment, much cheaper than replacing tranny. good luck!
Posted on Feb 09, 2009
There are diagnostic tools that could help detect what your problem is. The Snap-On Modis, or preferably a "Tech-2" GM scanner. Any reputable transmission shop, or GM dealer should have at least one of the two. It sounds to me like it could be the transmissions "EPC" (Electronic Pressure Control solenoid) The EPC controls main line pressure, in an effort to keep shift firmness, and shift duration at one specific level. This is to compinsate for the natural wear a transmission encounters, and to keep emissions as low as possable, by keeping shift duration low. When the EPC malfunctions (and thats somthing that they like to do in the 4t65E), it typically starts to shift harder than normal. They typically throw a P1811 code. (P1811 is a "max adapt-long shift" code) And the malfunction can be intermittent. Hope this helps, and good luck.
Posted on Apr 19, 2009
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