if my 2006 chevy impala stalls to accelerate above 20 mph and check engine light is on, could my fuel pump be going out?

Asked by jmc84 Mar 02, 2014 at 07:44 PM about the 2006 Chevrolet Impala LS FWD

Question type: Maintenance & Repair

I replaced my engine a week ago but now the check engine light is on, the rpm gauge is not working at all and once I reach 20 mph the car takes at least 20 seconds before it accelerates and higher even though I have my foot on the gas pedal. If I press harder on the accelerator the car eventually goes faster. It also takes about 8 seconds to start after I turn the key in the ignition

6 Answers

88,405

Sounds like you have a bad Throttle Position Sensor. You may want to give the throttle body a good cleaning also. THROTTLE BODY CLEANING PROCEDURE Remove the air cleaner outlet duct. CAUTION: Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury. NOTE: Do not insert any tools into the throttle body bore in order to avoid damage to the throttle valve plate. Inspect the throttle body bore and the throttle plate for deposits. You will need to open the throttle plate in order to inspect all surfaces. NOTE: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components. Clean the throttle body bore and the throttle plate using a clean shop towel with GM Top Engine Cleaner, P/N(NNN) NNN-NNNNor AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or an equivalent product. Install the air cleaner outlet duct. http://www.youtube.com/watch?v=zUV4nXc-pXU

2 people found this helpful.

Same problem mine sat for two years tho. I cleaned valve body and didnt change anything. Did you have any luck?

40

ust purchased a used Chevy Impala 3.4 liter. I am having problems with acceleration. When I came to a complete stop and then accelerate the car it hesitates and jerks between 0-25 mph. The engine breathes heavy and the rmp fluctuates. I am not displaying any check engine lights. When purchasing the car I noticed the transmission fluids were 1.5 QTS low. I added fluids and the colors is red and I have no leaks. I believe it has some to do with the fuel system. I poured some fuel system clean in the tank to clean the injectors and filter and went to Walmart to have injectors blown out. It has help a little but still having the problem. I am about to take it to the shop to have them look at the throttle body sensor, fuel regulator, MAF sensor, MAP sensor and check for vacuum leak. Is there anything else that I should have them check to solve the problem? Has anyone else had this problem?

4 people found this helpful.
88,405

Julia, I bet the reason why they got rid of the car is because of the acceleration issue. I checked numerous forums on the issue. Apparently just about every Impala comes down with this issue. Not one person has come up with a definitive answer on the cure. They have changed everything under the sun and nothing seems to do the trick. I found one post where someone had said they knew a guy who changed out the camshaft sensor and that seemed to fix the issue for him. Like you, most people that have this issue, do not have the check engine light on. It's pretty much a shot in the dark on what part to change out. It doesn't seem to be one of the easy parts. People always start by changing out the fuel filter, plugs, wires, MAP sensor, MAF sensor, EGR, with no change in the issue. One guy even tore down his throttle body and cleaned it until it looked new and still had the same issue. If it were my car and after reading all of the forums with no luck, I would change out the TPS sensor and the Cam sensor first. People seem to change out all the easy sensors with no luck on fixing the issue. Even people that bring it to the dealer have no better luck. Since there's no check engine light, the dealerships don't want to waste hours on actually figuring out what the problem is. Please keep us posted on your progress.

2 people found this helpful.
10

Doc Dave say replace ur catalytic converter or hill Billy take screw drive sleghammer and put a hole it stop

Changed absolutely everything.. come to find out ... I bypassed the security system and did a reset on the car and it is fine now. It’s problems with the security system.. after while it messes up and once that happens it shuts down something wth the fuel system and that causes the car to not work. Hesitates, dies out, or won’t drive...ect...

Your Answer:

Impala

Looking for a Used Impala in your area?

CarGurus has 462 nationwide Impala listings starting at $2,990.

Postal Code:

Chevrolet Impala Experts

  • #1
    Rowefast
    Reputation
    4,830
  • #2
    Js08016
    Reputation
    4,180
  • #3
    dandyoun
    Reputation
    3,180
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Malibu
35 Great Deals out of 1,413 listings starting at $3,375
Used Dodge Charger
19 Great Deals out of 528 listings starting at $2,448
Used Honda Accord
54 Great Deals out of 1,589 listings starting at $100
Used Toyota Camry
55 Great Deals out of 1,949 listings starting at $2,200
Used Chrysler 300
17 Great Deals out of 576 listings starting at $3,900
Used Chevrolet Tahoe
7 Great Deals out of 468 listings starting at $508
Used Chevrolet Silverado 1500
75 Great Deals out of 6,692 listings starting at $3,000
Used Nissan Maxima
11 Great Deals out of 268 listings starting at $4,495
Used Nissan Altima
37 Great Deals out of 1,173 listings starting at $2,489
Used Buick LaCrosse
4 Great Deals out of 100 listings starting at $6,695
Used Ford Mustang
33 Great Deals out of 928 listings starting at $5,500
Used Jeep Grand Cherokee
63 Great Deals out of 3,534 listings starting at $2,995
Used Ford Fusion
41 Great Deals out of 1,223 listings starting at $1,495

Used Cars For Sale

2018 Chevrolet Impala LS FWD For Sale
2 listings starting at $17,500
2017 Chevrolet Impala LS FWD For Sale
1 listings starting at $16,998
2016 Chevrolet Impala LS FWD For Sale
1 listings starting at $14,909

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.