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2002 Toyota Corolla PO300/PO302 codes

Tiny
DAVE1310
  • MEMBER
  • 2002 TOYOTA COROLLA
I have been working on this diagnosis for over 1 yr, -eliminating as I go plugs replaced (NGK Iridium), coils replaced Denso Import Direct/ all where shorting), o2 sensors checked (working properly), compression checked good( varied approx. 140 PSI-165 also did wet and dry test, leak down), MAF cleaned and functioning, narrowed down to fuel delivery running rich (per my mechanic), car does run well however the CEL is on, fuel pressure tested and revealed to be very good, fuel pump sender tested very good, when I turn the key on you can hear specifically the pump go on, so we narrowed down to likely injector problem do concur with this also or have any other checks. All this said I have a good price offer for Re manufactured injectors, are these pretty much the same as new injectors denso brand, I don't want to spend to much for new injectors these are about half price?
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Saturday, July 18th, 2015 AT 10:38 AM

6 Replies

Tiny
OHYEA
  • MEMBER
  • 153 POSTS
Each re manufactured injector goes through a rigorous cycle to be brought back to its original functionality, so that's means a faulty injector is remade(remanufactured), which is a new injector.
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Saturday, July 18th, 2015 AT 4:07 PM
Tiny
OHYEA
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  • 153 POSTS
Here is some info of what the process is:
OHM tested
Injector’s o-rings, filters, pintle caps and washers are removed and discarded
Exterior of injector is cleaned
Injector is then submerged in very hot water and cleaning solution in an ultrasonic cleaner to break up deposits within the injector.
Injector is then reverse flushed to remove any additional debris loosened by the ultrasonic cleaner. (The above two steps is usually repeated numerous times making cleaning the most consuming of time)
Following cleaning, the injectors are tested at different pressures for leaks and spray pattern.
Injectors are then grouped in to matching sets which means they are flowing within 1-2% of each other. (Factory usually allows a variance of 3-5%)
Metal bodied injectors usually will have paint removed and depending on seller can be polished or repainted.
Injectors are given a light exterior clean
New parts are applied i.E Filters, o-rings, washers, and pintle caps.
Packaged in vacuum sealed bags (depending on seller)
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Saturday, July 18th, 2015 AT 4:09 PM
Tiny
OHYEA
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  • 153 POSTS
Also to pinpoint if an injector is not working you can check with a long screwdriver, stethoscope or the tool that checks to see if it fires( forgot the name) and you will hear a clicking as it is doing its job by putting the screwdriver to the injector and your ear
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Saturday, July 18th, 2015 AT 4:17 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
The injector may be firing but it may not and a good spray pattern, this is important and each injector have inline gauze filters if one of these is blocked it may also be causing your problems.
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Sunday, July 19th, 2015 AT 4:42 AM
Tiny
DAVE1310
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  • 64 POSTS
Thanks I really appreciate any advice
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Monday, July 20th, 2015 AT 4:57 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Ok, good luck
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Tuesday, July 21st, 2015 AT 2:40 PM

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