Question about 1995 Nissan Maxima

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Bad fuel infector on #1 cyl. Do I have to pull fuel rail or just remove phillips head screws on injector and replace . I know I have to take pressure off fuel rails.

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Posted on Sep 08, 2010

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03 3.7 have new o rings for bottom of injectors do you put it on the head first or on the injector just put head gaskets on jeep

old post but see it asked many times.
assemble the rail first, its 1 piece so must be ready first.
3.7L Engine (FSM) RTM?
(1) If fuel injectors are to be installed, refer to Fuel
Injector Removal/Installation.
(2) Clean out fuel injector machined bores in
intake manifold.
(3) Apply a small amount of engine oil to each fuel
injector o-ring. This will help in fuel rail installation.
(4) Position fuel rail/fuel injector assembly to
machined injector openings in cylinder head.
(5) Guide each injector into cylinder head. Be careful
not to tear injector o-rings.
(6) Push right side of fuel rail down until fuel
injectors have bottomed on cylinder head shoulder.
Push left fuel rail down until injectors have bottomed
on cylinder head shoulder.
(7) Install 4 fuel rail mounting bolts and tighten.
Refer to torque specifications.
(8) Install 6 ignition coils. Refer to Ignition Coil
(9) Connect electrical connectors to throttle body.
(10) Connect electrical connectors at all fuel injectors.
To install connector, refer to (Fig. 37). Push connector
onto injector (1) and then push and lock red
colored slider (2). Verify connector is locked to injector
by lightly tugging on connector.
(11) Connect necessary vacuum lines to throttle
(12) Connect fuel line latch clip and fuel line to
fuel rail. Refer to Quick-Connect Fittings.
(13) Install air box to throttle body.
(14) Install air duct to air box.
(15) Connect battery cable to battery.
(16) Start engine and check for leaks.

Oct 07, 2014 | Jeep Cars & Trucks

2 Answers

Replacing fuel injector

year car?
TBI or MPI? what engine, there are 4 or more.. 4 and 6 cylinders.
in general. I will spin the Karnac wheel of fortune and land on MPI.

1: depressurize fuel system.
2: remove rail bolts.
3: remove rail,
4: unplug injector connector ,under suspicion. (can be done first)
5: pull out injector from its cushion.

you could RTM and heed all warings... many

Aug 28, 2013 | Geo Cars & Trucks

1 Answer

Symptoms bad fuel injector,

If your fuel injection system has a fuel rail to deliver fuel to the injectors, you will have to remove it before you can remove the injectors.
First disconnect the fuel line at the end of the fuel rail. If there is another lune at the other end remove it too. (always be careful, some of these lines are under pressure).
Remove the screws or bolts which ever is holding the rail in place, if the wiring travels over the rail disconnect it first.
With everything disconnected, pull the rail away from the injectors. Most of the rails are just pressed on to the top of the injector tops, once you've removed the screws the rail should come off easily.
If your vehicle doesn't have a fuel rail then you have to disconnect the clips to each injector. Each injector will have a clip either at the top or at the top on the side that connects to the wire harness. Most fuel injector wiring plugs are held in place by a springy wir. To remove this wire, put a flat head screwdriver between the wire spring and the clip and CAREFULLY pull it away (don't loose it).
With everything off, you are are ready to remove the injectors (it is recommended that you use an injector puller) it is important that you don't break anything or let dirt and debri fall inside of the port wholes of the engine.
With the injector puller you just slide it under the injector and pop it right out.
To put the new injectors in just do the same as removing the in reverse. Remember to be careful and don't force anything.

I hope this helps for you.
Sorry if all thre pictures don't show.

May 11, 2013 | 2006 Saturn ION

1 Answer

How to install a fuel injector on a 2002 jeep liberty 3.7

so that mean the old one is all ready removed.?
or did you mean all steps in the fsm for INJECTOR.
the steps are the same on all EFI fuel rail injectors.
you could google that or you tube it or read the FSM.

hide call keys from step 2 on, or very bad things can happen.
(wife or kids no aware of danger)
ill just cover the (basics)
1: per FSM , depressurize the system, in can be at 60PSI
parked. so avoid fuel in eyes, or a fire. we do that first.
gain access to rail under failure. (RUF) (no barking)
2: remove injector X , wire plug. (failing)
3: then detach the injector rail clamps the both rails off as one....
injector are all now loose, to pull off.
4: add new seals to new injector, and install in reverse order.

that's it, only the gain access , varies,... mostly.

last depressure steps:
run engine,
remove fuel pump relay, engine stalls. key off, hide keys

next tje FSM words (just the OFF section)

  1. Remove fuel tank filler tube cap.
  2. Perform Fuel System Pressure Release Procedure.
  3. Remove negative battery cable at battery.
  4. Remove air duct at throttle body air box.
  5. Remove air box at throttle body.
  6. Disconnect fuel line latch clip and fuel line at fuel rail. A special tool will be necessary for fuel line disconnection.
  7. Remove necessary vacuum lines at throttle body.
  8. Disconnect electrical connectors at all 6 fuel injectors. Push red colored slider away from injector. While pushing slider, depress tab and remove connector from injector. The factory fuel injection wiring harness is numerically tagged (INJ 1, INJ 2, etc.) for injector position identification. If harness is not tagged, note wiring location before removal.
  9. Disconnect electrical connectors at throttle body sensors.
  10. Remove 6 ignition coils.
  11. Remove 4 fuel rail mounting bolts.
  12. Gently rock and pull left side of fuel rail until fuel injectors just start to clear machined holes in cylinder head. Gently rock and pull right side of rail until injectors just start to clear cylinder head holes. Repeat this procedure (left/right) until all injectors have cleared cylinder head holes.
  13. Remove fuel rail (with injectors attached) from engine.
end expert.
login and read all steps. that be best , then ask questions?

Jan 02, 2012 | 2002 Jeep Liberty

1 Answer

I need to replace the manifold to cyl heads gaskets due to coolant leak on my 1998 454 C3500. I've disconnected everything including electical connectors to injectors & all mounting bolts. Fuel rail is...

pull the rails off, may take a little effort to remove because of O rings hold it in place. After you take fuel rales off make shore to replace the O ring's with new ones. lube the new O rings when reinstalling parts good luck CJ

Aug 03, 2010 | Chevrolet 3500 Cars & Trucks

2 Answers

How to replace fuel injector 97 cavalier 2.2L

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Disconnect the negative battery cable.
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.
Remove the air cleaner outlet resonator mounting screw.
Disconnect the air cleaner outlet resonator clamp at the throttle body.
Remove the air cleaner outlet duct from air cleaner outlet resonator and air cleaner assembly.
Disconnect the crankcase vent hose clamp and the crankcase vent hose from the top of the engine.
Remove the air cleaner outlet resonator.
Remove the fuel rail bracket.
Remove the fuel injector electrical connectors by pushing in the wire connector clip and pulling the electrical connector away from the fuel injector.
Remove the fuel feed inlet pipe quick connect.
Remove the fuel return pipe from the fuel pressure regulator.
Remove the fuel rail attaching bolts.
Remove the fuel rail assembly from the cylinder head.
Remove the fuel injector retaining clip.
Remove the fuel injector.
Important Visually inspect the fuel injector to see if the upper O-ring was also removed, if not, remove the O-ring from the fuel rail assembly

Oct 26, 2009 | 1997 Chevrolet Cavalier

1 Answer

How hard is it to replace a fuel injector?

Relieve the fuel pressure. Unplug the injector rail wire harness. Remove the two fuel rail mounting bolts and the small screw and clip that secure the lines to the exhaust camshaft housing. Pull strait out while wiggling the fuel rail. At the top of the injector,remove the clip and unplug the electric. Remove the clip on the bottom of the rail that holds the injector in. Pull the injector strait out. Check that the O-rings are still attached to the bottom of the injector and at the top. If not, CAREFULLY.. remove them from the holes that they were mounted in.

Jul 01, 2009 | 1997 Chevrolet Cavalier

1 Answer

Serious miss, almost like dropped cylinder, No

I don't know what year your ford is but most of them have the injectors mounted externally. There not bad at all to do. Vehicle off, release fuel-line pressure, remove the bolts holding down fuel rail, pull the injector/s out of the head, lap injector o-ring with motor oil, install new injector/s into head. lap top o-ring with motor oil, install fuel rail, start vehicle, and check for leaks. If you are only replacing a few injectors do buy new injector o-rings for the other injectors. You will not be able to push the fuel-rail back onto the injectors without replacing them (they will be swolen).

May 15, 2009 | Ford Explorer Cars & Trucks

1 Answer

Dead miss on #1 cyl

hole in top of piston/rings broke/big gouge down side of piston.head gasket or head related problem,oil feed to head runs by no 1 cylinder .Do a compression test,or just pull the head off and have a look.

Apr 18, 2009 | 2000 Volkswagen Jetta TDI

1 Answer

Cyl. 1 and 3 missfire

An injector can pulse without spraying fuel. They can get plugged or get build up on the nozzle and squirt fuel instead of spraying or not spray at all.. Your fuel rail is common rail, so your fuel line should go through a pressure regulator and then to a rail that dispenses the fuel equally. I have heard of cases where kia replaced the fuel rail to solve this problem. All the injectors will get the same amount of fuel pressure with this system, so if you have injector pulse and no missfires on #2 and #4, i would suspect clogged injectors. You can have an injector flush performed, which is probably not a bad ideal any way, to see if you can clean them up, or just replace the bad injectors. You can also inspect them visually to see if there is any debris on the nozzles. I wouldn't recomend that to an inexperienced person. Fuel can be very dangerous. I have head of techs removing the injector from the rail and running the car and watching the injector spray the fuel. Not recommended at all. All it takes is one spark or hot surface. Do a fuel injection clean, or buy some BG brand 44k fuel treatment and put in the tank first, the fill it up with gas. You can remove the injector and soak it in injector cleaner also to help free it up. If any of these don't help, time to take it in...they are also experiencing ECU problems..

Mar 07, 2009 | 2002 Kia Rio

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