2004 impala only starts and runs when gas pedal is pushed but dies when let off

Asked by Nov 14, 2014 at 07:58 PM about the 2004 Chevrolet Impala LS

Question type: Maintenance & Repair

my car will crank but wont start but when i hold gas pedal in and it runs as long as i hold gas soon as i let off gas it dies ive tried fuel pump maf sensor map sensor throttle postion sensor made no difference then car works fine for a couple day and will do the same thing

13 Answers

17,900

How about fuel filter, fuel pressure regulator or fuel injectors? Also and maybe first thing, look at the throttle plate (butterfly) itself. Make sure its clean. If not clean it well with carb cleaner.

2 out of 2 people think this is helpful.
17,900

Oh, good call T_S_T!

2 out of 2 people think this is helpful.
61,495

Just to add to my buddy TA77,answer,thought of two thing,s,,The IAC,and the crank sensor,will do this on the impala.And hello,, TA.

1 out of 1 people think this is helpful.
17,900

What's going on T_S_T?

2 out of 2 people think this is helpful.
61,495

Nothing much Ta, hows it going for you,just chiling trying to help a few people out with there problem,s,,same as you : )

1 out of 1 people think this is helpful.
17,900

Not bad, not bad. Freezing my a$$ off though. Just took my dog out its about 22. Not ready for this cold this fast.

2 out of 2 people think this is helpful.
61,495

Lmao,yea i here ya,only 32 here,but dropping fast.

1 out of 1 people think this is helpful.
10

did you find a solution? I have the same problem to

17,900

Hey Dana, its going to be the fuel pressure regulator, throttle plate probably needs to be cleaned too. Start with the throttle plate first.

1 out of 1 people think this is helpful.
10

Awsome! Thanks TransAm77 I will clean it and report back.

1 out of 1 people think this is helpful.
17,900

Ok sounds good.

1 out of 1 people think this is helpful.

I am having a similar type issue, however My 2000 Impala does not rough idle. It turns over and as long as my foot is on the gas it runs, the moment I take my foot off the gas it stalls. I am currently replacing the fuel filter. The fuel pump was replaced a year ago, I am going to clean the throttle body next but I am unsure if I am really needing to do this or if there is something else I should be doing. I'll be damned if I take this car back to the shop just so it can break down again ( thinking my impala is a lemon it has been in the shop more than I have been driving it)

I had a similar issue. There was carbon build up in the fuel injection system. Once the idle air control valve was cleaned and fuel induction service was performed, the car started and idled fine.

Your Answer

Add photo

Related Questions

Impala

Looking for a Used Impala in your area?

CarGurus has 34,384 nationwide Impala listings starting at $799.

ZIP:

Search Chevrolet Impala Questions

Chevrolet Impala Experts

#1 Js08016
Js08016
Reputation 1,670
#2 Danny Wang
Danny Wang
Reputation 1,640
#3 Tom Demyan
Tom Demyan
Reputation 1,450
View All

Related Models For Sale

Used Chevrolet Malibu
1,006 Great Deals out of 85,672 listings starting at $1,995
Used Honda Accord
811 Great Deals out of 81,613 listings starting at $899
Used Chrysler 300
404 Great Deals out of 22,149 listings starting at $1,000
Used Nissan Maxima
347 Great Deals out of 25,223 listings starting at $1,400
Used Nissan Altima
1,087 Great Deals out of 82,558 listings starting at $670
Used Chevrolet Tahoe
772 Great Deals out of 28,452 listings starting at $1,500
Used Buick LaCrosse
308 Great Deals out of 22,575 listings starting at $1,100
Used Ford Mustang
362 Great Deals out of 44,486 listings starting at $1,000
Used Toyota Camry
1,091 Great Deals out of 96,268 listings starting at $1,250
Used Chevrolet Silverado 1500
2,290 Great Deals out of 155,163 listings starting at $1,395
Used Ford Taurus
254 Great Deals out of 20,514 listings starting at $1,500

Used Cars For Sale

2017 Chevrolet Impala LS For Sale
1,169 listings starting at $19,750
2016 Chevrolet Impala LS For Sale
15 Great Deals out of 1,020 listings starting at $13,991
2015 Chevrolet Impala LS For Sale
7 Great Deals out of 418 listings starting at $11,795
2014 Chevrolet Impala LS For Sale
16 Great Deals out of 375 listings starting at $10,994
2013 Chevrolet Impala LS For Sale
3 Great Deals out of 43 listings starting at $5,900