So I replaced the injectors in my car. I have a total of 6 NEW pink top injectors. I start the car up yesterday and it fired up right away, but there is still a miss, the car is sluggish through the entire RPM range. I checked the plugs, they are all fine.

WHat is up?

Just some history, I have had about 3 injectors fail on me (all refurbs). One so bad you could see gas dripping out of the tail pipe. The other two was just stuck open spraying fuel all the time.

Is my converter catalytic converter clogged? I noticed in the a.m. the usually "morning fog" out of the tail pipe is not there...you know when you start a car in the a.m. on a cool/cold day and you can see the "morning fog" come out of the tail pipe.

The car drives smooth at highway speed, even has decent passing power,but when I get in teh city/traffic, it is very sluggish with an abvious miss. A clogged converter wont caause a miss, will it?

FYI, when my last injector failed, I limped the car home and it would barely get going down the road.

Any help is appreciated. My first dealing wtih a foreign car has been hell. Feedback please!

 

i don't remember if you did this in your other thread, but have you pulled your ECU codes yet? i always think of this as a first step in diagnosis. If the computer sees a problem, then you know where to look. If it doesn't... then you actually have to find the problem yourself.

 

well....first of all gas wouldn't be dripping out the tail pipe. That was probably water....unless you actually smelled it and it smelled like gas.

Refurbed injectors are terrible, from what I know and have heard on this forum time and time again. It's better to just get them out of a junk yard car and ohm test them and put them in yours. I doubt it's your catalytic converter. You could check the MAF, but that generally causes the entire engine to run rich, not just one cylinder.

 

Your injectors aren't failing, you're failing to install them correctly. Your o-rings are leaking, you need to lube them up with petro jelly and slowly seat them by screwing the caps down. Alternate turning both screws 1/4 of a revolution at a time until they are fully seated.

 

When was the knock sensor replaced?

 

Came here to say this...

 

petro jelly or motor oil

 

should I start including a package of lubricant with these injectors now?

 

No. if we are too hasty to read instructions, we should pay for it on our own. usually.

 

i am having the same problem with my 91 vg. it starts fine but time to time it will start missing and be sluggish through rpm. sometimes it will just go away sometimes it will stay. i havnt had the problem in the past few days but i need some suggestions on what to do first. everyone at my work that has a diagnostic machine has the obd2 plug in it.... i need the obd1!!!

 

well, OBDI isn't really universal like OBDII was so you'd have to have the one specifically for our cars, or maybe for all Nissans of that time or w/e. Point being that there's not just one OBDI scanner. Though i've heard of a universal scanner that will scan everything, and has different attachments and lets you enter in the make and model of the car and it'll configure itself to read based on the pinout supplied by the manufacturer.

 

it doesn't do all cars.
it does a LOT of cars, but sadly not all.
I do have to try it on the subi though. it did work on my VEs, I30, and Sentra though.

 

actually the one you mentioned is the one i was referencing. i definitely meant to disclaim that it doesn't scan all but somehow i didn't do that before posting.

 

a snap-on scanner or ethos.

i've used both on OBD-1 nissans, my old 93 SE-R, and my Vg30. i would prefer snap on, but both work just as well

 

Small amount of motor oil on the o'rings, they slide right in....1/4 screw revolutions at a time.

I'll add more later. Gotta get to work now.

 

hasnt been replaced.

 

Oh, and I am not failing to install these injectors. It is very simple. Pull the rail, put small amount of oil on rubber o-rings, and re-install the injector. I screw them down at a even ratio so no one side is all the way down vs another.

Before I sold my corvette (former hardcore corvette guy), I put 3 different motors in it, 4 different intakes, fuel systems, stand alone engine management systems (ever heard of F.A.S.T.), transmissions, torque converters, etc. So I am not a noob to working on cars.

Thanks for the input though....

 

No, its in the shop manual to lube the o-rings.

 

BTW, the only place the o-rings can leak is outside the manifold right into the engine bay? they cant leak back into the fual rail? There are two o-rings as you know. One on top and one on the bottom....

 

im going to pull the computer codes...have not though because it always points to the injectors.

 

No, it was gas...trust me! It was ALOT of gas dripping out of the tail pipe. And I agree, refurb injectors are terrible...total waste of money.

 

I found out whats wrong with the car....

You have mail!

 

the #2 fuel injector wire was snipped. I have since fixed the broken wire (was caught inbetween the manifold when originally installed, saw no sign of breakage upon correction) and the car runs great. Gets +28 mpg.

 

i have experienced the same problem on a few accations and the connector for the snap-on scan tool is the nissan obd-1 #1 adaptor bc there is 2 obd1 connectors for nissans.