question about replacing fuel injector. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

kholistics23 · 01-25-2012, 09:59 PM

Hey guys.. i just have a quick question. One of my fuel injectors went bad and my car was running really bad and the engine was misfiring really bad. so i had my mechanic change that one fuel injector. Now my car is running better but got a slight hiccup when on idle or sometimes my car would hesitate when accelerating from anywhere around 1k till 2.5k (especially when the engine is cold). So i was wondering is it because i didnt change all the fuel injectors thats causing this or is it because the fuel injector that my mechanic put on is a wrong kind or could it be something else? i just want my car to run properly again and not bog anymore. thanks!

Nicelyphe · 01-25-2012, 10:08 PM

Sounds bad. Haha, well first things first. What kind of car do you drive? What motor is inside? Anything aftermarket?

kholistics23 · 01-25-2012, 10:19 PM

Quote:

Originally Posted by Nicelyphe

Sounds bad. Haha, well first things first. What kind of car do you drive? What motor is inside? Anything aftermarket?

ohh yeah sorry bout that, but i drive a 1990 240sx hatchy. Everything in the car is stock.. no after market parts. only thing ive done is convert the car from automatic to manual.

swanney24 · 01-28-2012, 03:39 PM

ohm all of your injectors out, they should ohm out to aprox. 11 (10.6-11.4) ohms, if its over or under they are bad you have to have them at about room temperature btw

iBlaze240 · 01-28-2012, 06:00 PM

Does the engine shake excessively at idle? That would indicate if an injector is possibly bad. If so, pull the spark plug wires until one of them does not change the shaking, and that will be the cylinder with the bad injector. Other than that make sure your plugs are good as well. Pull them all and check for a good indication of operation such as the electrode being slightly grey and dry. I've gone through two bad injectors this year so these are some things I did to make sure of what was going on. And while your at it, take off your cap and rotor and check for any excessive wear or dirtiness, and clean em up.

kholistics23 · 01-28-2012, 11:57 PM

Quote:

Originally Posted by iBlaze240

Does the engine shake excessively at idle? That would indicate if an injector is possibly bad. If so, pull the spark plug wires until one of them does not change the shaking, and that will be the cylinder with the bad injector. Other than that make sure your plugs are good as well. Pull them all and check for a good indication of operation such as the electrode being slightly grey and dry. I've gone through two bad injectors this year so these are some things I did to make sure of what was going on. And while your at it, take off your cap and rotor and check for any excessive wear or dirtiness, and clean em up.

umm before my car shaked really bad.. it even broke my engine mounts. but i got the fuel injector and the engine mounts replaced, but when i switched it.. its started running really weird.. it would hesitate alot when its cold. Really bad on first gear. but when it warms up.. then you could only feel it if youre looking for it. but my idle has hiccups.

kholistics23 · 01-29-2012, 01:56 AM

Quote:

Originally Posted by iBlaze240

Does the engine shake excessively at idle? That would indicate if an injector is possibly bad. If so, pull the spark plug wires until one of them does not change the shaking, and that will be the cylinder with the bad injector. Other than that make sure your plugs are good as well. Pull them all and check for a good indication of operation such as the electrode being slightly grey and dry. I've gone through two bad injectors this year so these are some things I did to make sure of what was going on. And while your at it, take off your cap and rotor and check for any excessive wear or dirtiness, and clean em up.

umm before my car shaked really bad.. it even broke my engine mounts. but i got the fuel injector and the engine mounts replaced, but when i switched it.. its started running really weird.. it would hesitate alot when its cold. Really bad on first gear. but when it warms up.. then you could only feel it if youre looking for it. but my idle has hiccups.

01-25-2012, 09:59 PM	#1
kholistics23 Join Date: Oct 2011 Location: West Covina Age: 28 Posts: 47 Trader Rating: (0) Feedback Score: 0 reviews	question about replacing fuel injector. Hey guys.. i just have a quick question. One of my fuel injectors went bad and my car was running really bad and the engine was misfiring really bad. so i had my mechanic change that one fuel injector. Now my car is running better but got a slight hiccup when on idle or sometimes my car would hesitate when accelerating from anywhere around 1k till 2.5k (especially when the engine is cold). So i was wondering is it because i didnt change all the fuel injectors thats causing this or is it because the fuel injector that my mechanic put on is a wrong kind or could it be something else? i just want my car to run properly again and not bog anymore. thanks!

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01-25-2012, 10:08 PM	#2
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	Sounds bad. Haha, well first things first. What kind of car do you drive? What motor is inside? Anything aftermarket?

01-28-2012, 03:39 PM	#4
swanney24 Join Date: Jan 2012 Location: missouri Age: 31 Posts: 39 Trader Rating: (1) Feedback Score: 1 reviews	ohm all of your injectors out, they should ohm out to aprox. 11 (10.6-11.4) ohms, if its over or under they are bad you have to have them at about room temperature btw

01-28-2012, 06:00 PM	#5
iBlaze240 Leaky Injector Join Date: Feb 2011 Location: Connecticut Posts: 104 Trader Rating: (0) Feedback Score: 0 reviews	Does the engine shake excessively at idle? That would indicate if an injector is possibly bad. If so, pull the spark plug wires until one of them does not change the shaking, and that will be the cylinder with the bad injector. Other than that make sure your plugs are good as well. Pull them all and check for a good indication of operation such as the electrode being slightly grey and dry. I've gone through two bad injectors this year so these are some things I did to make sure of what was going on. And while your at it, take off your cap and rotor and check for any excessive wear or dirtiness, and clean em up.