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?

2 Answers

254,775

Fuel pumps? You mean fuel injectors. If nothing happened when you removed injector #2, it might be clogged causing the misfire, have it cleaned. Use top tier fuel and you won't be having issues like this.

2 of 2 people found this helpful.
70,375

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 55,995 nationwide Corolla listings starting at $1,488.

ZIP:

Toyota Corolla Experts

  • #1
    Tom Demyan
    Reputation
    2,470
  • #2
    tenspeed
    Reputation
    1,840
  • #3
    tennisshoes
    Reputation
    1,780
View All

Related Models For Sale

Used Toyota Camry
1,037 Great Deals out of 72,979 listings starting at $295
Used Honda Civic
792 Great Deals out of 72,306 listings starting at $1,350
Used Honda Accord
1,088 Great Deals out of 60,851 listings starting at $1,099
Used Toyota RAV4
785 Great Deals out of 49,327 listings starting at $1,500
Used Nissan Altima
948 Great Deals out of 74,798 listings starting at $1,300
Used Nissan Sentra
518 Great Deals out of 49,497 listings starting at $2,400
Used Hyundai Elantra
480 Great Deals out of 42,552 listings starting at $1,995
Used Toyota Tacoma
621 Great Deals out of 42,241 listings starting at $1,500
Used Toyota Prius
310 Great Deals out of 16,800 listings starting at $1,500
Used Honda CR-V
815 Great Deals out of 53,890 listings starting at $1,750
Used Mazda MAZDA3
341 Great Deals out of 26,475 listings starting at $950
Used Toyota Yaris
66 Great Deals out of 3,038 listings starting at $2,200
Used Hyundai Sonata
663 Great Deals out of 49,536 listings starting at $500
Used Chevrolet Cruze
918 Great Deals out of 58,850 listings starting at $2,990
Used Ford Focus
751 Great Deals out of 52,507 listings starting at $999

Used Cars For Sale

2016 Toyota Corolla S For Sale
21 Great Deals out of 748 listings starting at $9,988
2015 Toyota Corolla S For Sale
31 Great Deals out of 763 listings starting at $9,245
2014 Toyota Corolla S For Sale
29 Great Deals out of 692 listings starting at $7,100

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.