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

261,775

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.
71,705

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 4,104 nationwide Corolla listings starting at $1,400.

Postal Code:

Toyota Corolla Experts

  • #1
    Tom Demyan
    Reputation
    2,510
  • #2
    tenspeed
    Reputation
    1,850
  • #3
    tennisshoes
    Reputation
    1,810
View All

Related Models For Sale

Used Toyota Camry
93 Great Deals out of 2,326 listings starting at $2,000
Used Honda Civic
322 Great Deals out of 3,575 listings starting at $1,495
Used Honda Accord
87 Great Deals out of 1,038 listings starting at $750
Used Toyota RAV4
67 Great Deals out of 3,291 listings starting at $1,000
Used Nissan Altima
113 Great Deals out of 1,444 listings starting at $2,995
Used Nissan Sentra
246 Great Deals out of 1,885 listings starting at $2,900
Used Toyota Tacoma
38 Great Deals out of 1,027 listings starting at $7,950
Used Hyundai Elantra
202 Great Deals out of 3,385 listings starting at $1,300
Used Toyota Prius
5 Great Deals out of 134 listings starting at $4,480
Used Honda CR-V
45 Great Deals out of 2,379 listings starting at $990
Used Mazda MAZDA3
176 Great Deals out of 2,724 listings starting at $790
Used Toyota Yaris
37 Great Deals out of 777 listings starting at $2,000
Used Hyundai Sonata
50 Great Deals out of 1,454 listings starting at $2,495
Used Chevrolet Cruze
311 Great Deals out of 5,803 listings starting at $3,960
Used Ford Focus
107 Great Deals out of 2,609 listings starting at $1,095

Used Cars For Sale

2016 Toyota Corolla S For Sale
6 Great Deals out of 46 listings starting at $14,966
2015 Toyota Corolla S For Sale
23 Great Deals out of 107 listings starting at $12,995
2014 Toyota Corolla S For Sale
22 Great Deals out of 200 listings starting at $9,995

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.