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

292,295

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 people found this helpful.
79,065

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 67,219 nationwide Corolla listings starting at $1,000.

ZIP:

Toyota Corolla Experts

  • #1
    Tom Demyan
    Reputation
    2,720
  • #2
    tennisshoes
    Reputation
    1,900
  • #3
    tenspeed
    Reputation
    1,870
View All

Related Models For Sale

Used Toyota Camry
743 Great Deals out of 73,783 listings starting at $1,195
Used Honda Civic
363 Great Deals out of 50,738 listings starting at $1,499
Used Honda Accord
539 Great Deals out of 104,189 listings starting at $950
Used Toyota RAV4
479 Great Deals out of 79,637 listings starting at $1,995
Used Nissan Altima
729 Great Deals out of 67,988 listings starting at $1,499
Used Hyundai Elantra
464 Great Deals out of 49,139 listings starting at $1,700
Used Nissan Sentra
544 Great Deals out of 48,249 listings starting at $1,400
Used Toyota Prius
145 Great Deals out of 17,873 listings starting at $1,000
Used Mazda MAZDA3
230 Great Deals out of 25,698 listings starting at $1,200
Used Toyota Yaris
43 Great Deals out of 2,486 listings starting at $1,800
Used Toyota Tacoma
421 Great Deals out of 48,132 listings starting at $2,994
Used Honda CR-V
590 Great Deals out of 78,097 listings starting at $1,492
Used Chevrolet Cruze
530 Great Deals out of 62,445 listings starting at $2,995
Used Hyundai Sonata
364 Great Deals out of 48,235 listings starting at $1,900
Used Ford Focus
407 Great Deals out of 80,993 listings starting at $999

Used Cars For Sale

2016 Toyota Corolla S For Sale
25 Great Deals out of 791 listings starting at $9,999
2015 Toyota Corolla S For Sale
24 Great Deals out of 789 listings starting at $7,900
2014 Toyota Corolla S For Sale
8 Great Deals out of 271 listings starting at $7,991

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.