Fuel Injectors

Tiny
JOSEYMOES
  • MEMBER
  • 1997 CADILLAC DEVILLE
  • V8
  • AWD
  • AUTOMATIC
  • 143,400 MILES
Is there any way for me to know if I need new fuel injectors? I am getting conflicting opinions.
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Tuesday, February 16th, 2016 AT 1:23 PM

11 Replies

Tiny
CATAFINA
  • MEMBER
There is really no way of telling unless you have a fuel injector tester or remove the fuel rail connect the injectors and look for a cone shape pattern.
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Tuesday, February 16th, 2016 AT 2:10 PM
Tiny
JOSEYMOES
  • MEMBER
Thank you!
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Tuesday, February 16th, 2016 AT 2:22 PM
Tiny
KEN
  • ADMIN
Check this guide out.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector
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Tuesday, February 23rd, 2016 AT 10:38 AM
Tiny
JOSEYMOES
  • MEMBER
Wow! Thank you, that was really helpful. I do appreciate it.
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Wednesday, February 24th, 2016 AT 9:08 PM
Tiny
GHS56
  • MEMBER
  • 1995 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
My car is a 1995 Cadillac Deville, it has 1 fuel injector missing. Will it hurt the engine to keep running the car?
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Tuesday, December 20th, 2016 AT 6:05 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
You'll end up burning more fuel to keep it going-imbalance air/fuel mixture to the cylinders
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Tuesday, December 20th, 2016 AT 6:05 PM (Merged)
Tiny
MHPAUTOS
  • EXPERT
Get all the injectors serviced & flow tested, do not just do the one faulty injector, you wiill pay for this quickly with the saving in fuel usage.
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Tuesday, December 20th, 2016 AT 6:05 PM (Merged)
Tiny
CHARLASDILLARD
  • MEMBER
  • 1990 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 149,000 MILES
1990 Cadillac Deville V8 Front Wheel Drive Automatic 149000 miles

i have a miss and im hoping its not my injectors, im hopeing its my rotor and cap or wires, how can I tell its not my injectors?
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Tuesday, December 20th, 2016 AT 6:05 PM (Merged)
Tiny
FACTORYJACK
  • EXPERT
Check spark on the cylinder if it is known which one. Do a compression test on the cylinder. Listen to the injector with a long rod or screwdriver for a clicking noise. If you verify spark and compression on the cylinder, it can most likely be the injector.
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Tuesday, December 20th, 2016 AT 6:05 PM (Merged)
Tiny
PIATKOWSKI000
  • MEMBER
  • 1977 CADILLAC SEVILLE
  • 5.7L
  • V8
  • RWD
  • AUTOMATIC
  • 2,147,483,647 MILES
Hello my friends, can You help me? I have question about fuel injectors. Should all of the injectors be the same color? Is the big difference for the engine if they are different color, but they are for the correct engine? I will be very very thankful for help. Sorry for my English. Best regards.
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Tuesday, December 20th, 2016 AT 6:05 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
The color is not the important issue. They could be from different suppliers or different manufacturing dates. What is important is their flow rates. Replacing just one or two injectors can result in them having different flow rates. That has been the source of a lot of Check Engine light problems on 1990's GM vehicles. At high mileage, one or two injectors flow a lower fuel volume resulting in some cylinders running lean. There can be misfires too, so you are chasing misfire fault codes and "running too lean" fault codes. The fix is to buy a flow-matched set of rebuilt injectors. Most manufacturers buy their injectors in flow-matched sets from their suppliers. GM is one of the few that just grab a handful of injectors out of a bin and toss them into the engine with no regard to flow-matching. That does not cause a problem until they have a little wear from high mileage, then the elusive problems start.

Your car is not new enough to have the computer controls that detect misfires, and those that might occur are generally too hard to notice.
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Tuesday, December 20th, 2016 AT 6:05 PM (Merged)

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