2003 Chevy Impala

JGHUDSON

MEMBER
2003 CHEVROLET IMPALA
6 CYL
FWD
AUTOMATIC
99,354 MILES

Car sputters when shifting

Friday, February 27th, 2009 AT 11:02 AM

4 Replies

DENNYP

MECHANIC
1,824 POSTS

Remove the plug wires from the ignition coils and check the coil towers for corrosion. Check spark plugs for carbon tracking(black lines down sides of plugs) or excessive wear.

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Friday, February 27th, 2009 AT 10:00 PM

JGHUDSON

MEMBER
2 POSTS

Hi Again

Those all looked good. Can it be the modular valve on the transmission?

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Saturday, February 28th, 2009 AT 11:03 AM

DENNYP

MECHANIC
1,824 POSTS

There is no modulator valve on the newer transmissions. It is possible it's a pc solenoid or tcc solenoid. You will need to observe scan tool data while the fault is occuring to narrow down the fault.

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Saturday, February 28th, 2009 AT 12:39 PM

FRUSTRATED-IN-GA

MEMBER
3 POSTS

We have been having trouble with my 2003 Chevy Impala and threw parts at it left and right... Mass airflow, pcv, throttle position sensor, fuel filter and many more... Never a service engine light on. I thought it was my transmission, I really can't afford this right now. I took it to a recommended garage and guess what guys? After months of going back and forth 6to the parts store I finally found out what was wrong...I took it to a local garage and he asked me what was going on with it I told him and 30minutes later he told me what was wrong. It only cost me $140.00 to fix it... Check your car before going any further! It was my Catalytic Converter causing my car to almost stop when excellerating or climbing any kind or incline. After all that unnecessary work it's fixed.

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Thursday, April 2nd, 2009 AT 7:52 PM