It's my understanding all of the casings on q injectors are purple. I recently had my injectors replaced with remanufactured nissan injectors and all of the casings are red.
The cold start idle on my car is rough and interminttenly I loose power.
Is it possible they put in the wrong nissan injectors? I just learned that injectors for Nissan's 4 & 6 cylinders are red.
Would an injector for a smaller engine even fit?
Are All Q fuel injector casings the same color?
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Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
The red one will physically fit but are a 25% smaller flow rate so your engine would be VERY VERY lean and self destructive to say the least!
Never ever use WOT throttle as it will melt everything quickly!
The ecu can adjust a maximum of 15-20% at cruise for partially plugged injectors or a bad fuel pump, but you are way outside the capabilities!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Nissan picks injectors based on cylinder size [your 561 cc Q vs a 500 cc 3.0 liter V6 or I4..............also the duty cycle injector on time on Q is shorter than most of the others......12% smaller + 12% shorter is why you are 25% to lean.
Immediately remove [and plug the end going to plenum] the vacuum hose on the fuel pressure regulator to richen by 12% if you have to run the engine...............Hope you haven't burned all the exhaust valves/seats and softened the piston crowns!!!!!!!!!!!!!!!!
Get the correct NEW not remanned as there is no such thing [only cleaned up junk yard takeouts]!
Never ever use WOT throttle as it will melt everything quickly!
The ecu can adjust a maximum of 15-20% at cruise for partially plugged injectors or a bad fuel pump, but you are way outside the capabilities!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Nissan picks injectors based on cylinder size [your 561 cc Q vs a 500 cc 3.0 liter V6 or I4..............also the duty cycle injector on time on Q is shorter than most of the others......12% smaller + 12% shorter is why you are 25% to lean.
Immediately remove [and plug the end going to plenum] the vacuum hose on the fuel pressure regulator to richen by 12% if you have to run the engine...............Hope you haven't burned all the exhaust valves/seats and softened the piston crowns!!!!!!!!!!!!!!!!
Get the correct NEW not remanned as there is no such thing [only cleaned up junk yard takeouts]!
Q45Tech, thanks for the response. I removed the vacum hose as you instructed. I am taking the car in on Monday to get the correct injectors installed. The shop that put the wrong injectors are giving me a refund for the bad injectors, but I am having another shop install the new injectors.
The car seems to be running fine. What would be a sign that the exhaust valves/seats or piston crowns are damaged?
I have learned my lesson in dealing with inexperienced shops and remaned injectors.
The car seems to be running fine. What would be a sign that the exhaust valves/seats or piston crowns are damaged?
I have learned my lesson in dealing with inexperienced shops and remaned injectors.
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Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
A compression/leak down test and physical examination of components [which would be done at failure].
Assuming you didn't do dozens of acceleration runs hopefully little damage has been done. The Q is fairly tolerant of abuse for a short period [except oil and overheating].
I guess if you want to sue the shop in the future you would want to send all the red injectors to RC Engineering to get a certified report on their flow [probably about $25x 8=$200] mark them as to the cylinder they fed so future problem can be correlated.Hard to hire an expert with credentials to prove failure modes on a 100,000 mile plus engine as it exceeds the warranty and you have no documented tests before the work was done.Same with using another shop I'm surprised they will do the work [fix somebody elses mistake] without a liability release......have tehem document what they found signed report!See why we use nothing but dealer parts [and they make enough mistakes].
Assuming you didn't do dozens of acceleration runs hopefully little damage has been done. The Q is fairly tolerant of abuse for a short period [except oil and overheating].
I guess if you want to sue the shop in the future you would want to send all the red injectors to RC Engineering to get a certified report on their flow [probably about $25x 8=$200] mark them as to the cylinder they fed so future problem can be correlated.Hard to hire an expert with credentials to prove failure modes on a 100,000 mile plus engine as it exceeds the warranty and you have no documented tests before the work was done.Same with using another shop I'm surprised they will do the work [fix somebody elses mistake] without a liability release......have tehem document what they found signed report!See why we use nothing but dealer parts [and they make enough mistakes].