How do I check if my fuel pumps are working properly?

Asked by Feb 02, 2017 at 07:44 PM about the 2012 Toyota Corolla S

Question type: Maintenance & Repair

So my engine light turns on, I take my car
to a autozone and they tell me I had a
misfire on cylinder 2 so I bought a new
cylinder and a spark plug, turns out the
spark plug is burnt (which is normal my car
has 80k miles) so I put everything back
together and I turn on my car, the light still
on, I take m car back to autozone the next
day and they tell me the same thing, for
some reason I had a feeling all my spark
plugs were gonna be the same burnt, so I
went ahead and bought the other 3
replaced them, then the car still had the
light on, I took it back to autozone for a
third time and they gave me a paper of
reason of why the misfire was happening
and the fuel pump was one on them, I go
get on my car turn it on open the hood
disconnect the first fuel pump and the car
becomes weaker, then plug it back in and
it goes back to regular, then I disconnect
number 2 and nothing happens literally
nothing, I proceed to diconect #3&4 and
the same thing that happens with #1
happens, so can any of you guys tell me
how to find out which one is which? The
pump? Or the wiring?

1 Answer

81,465

Unless you clear the computer using a scan tool the check engine light will not go off immediately after the repairs are made. The computer must run the diagnostics on the system before the light will go off. For most vehicles the diagnostic test must run and pass three times before the light will go off. This can take a few days. If the engine isn't shaking, especially on acceleration, chances are it's not misfiring. Wait a few days and just drive normally, like you always do. If the light is still on and/or the engine is shaking there's something going on. I doubt that a single cylinder misfire would be caused by a faulty fuel pump. HTH. -Jim

Your Answer:

Corolla

Looking for a Used Corolla in your area?

CarGurus has 4,198 nationwide Corolla listings starting at $2,500.

Postal Code:

Toyota Corolla Experts

  • #1
    tennisshoes
    Reputation
    1,960
  • #2
    Jeff Polhemus
    Reputation
    1,930
  • #3
    tenspeed
    Reputation
    1,920
View All

Related Models For Sale

Used Toyota Camry
40 Great Deals out of 2,123 listings starting at $2,450
Used Honda Civic
125 Great Deals out of 4,661 listings starting at $1,655
Used Honda Accord
38 Great Deals out of 1,638 listings starting at $3,490
Used Toyota RAV4
96 Great Deals out of 4,279 listings starting at $958
Used Hyundai Elantra
77 Great Deals out of 3,965 listings starting at $3,490
Used Nissan Altima
42 Great Deals out of 1,206 listings starting at $1,600
Used Nissan Sentra
44 Great Deals out of 1,811 listings starting at $2,995
Used Honda CR-V
104 Great Deals out of 4,143 listings starting at $2,995
Used Toyota Tacoma
15 Great Deals out of 1,757 listings starting at $6,413
Used Chevrolet Cruze
60 Great Deals out of 7,520 listings starting at $3,400
Used Mazda MAZDA3
49 Great Deals out of 2,916 listings starting at $2,950
Used Toyota Prius
217 listings starting at $4,495
Used Toyota Yaris
34 Great Deals out of 721 listings starting at $2,795
Used Hyundai Sonata
37 Great Deals out of 1,396 listings starting at $2,500
Used Ford Focus
55 Great Deals out of 2,615 listings starting at $998

Used Cars For Sale

2016 Toyota Corolla S For Sale
53 listings starting at $13,488
2015 Toyota Corolla S For Sale
5 Great Deals out of 104 listings starting at $11,995
2014 Toyota Corolla S For Sale
5 Great Deals out of 130 listings starting at $10,995

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.