3rd Generation Maxima (1989-1994) Learn more about the 3rd Generation Maxima here.

How to check fuel pump/injectors?

Thread Tools
 
Search this Thread
 
Old 07-07-2004, 03:58 PM
  #1  
Senior Member
Thread Starter
 
Iron_Curtain's Avatar
 
Join Date: Sep 2003
Posts: 106
How to check fuel pump/injectors?

Is there any way to test the fuel pump in our car? I suspect it is on its way out. Also is there any way to check the injectors in our car?
Iron_Curtain is offline  
Old 07-07-2004, 06:15 PM
  #2  
Donating Maxima.org Member
 
broncoguy's Avatar
 
Join Date: Mar 2003
Posts: 541
I think the best way to test the pump is by checking the fuel pressure with a gauge- I've never done that, so I can't help you there. The injectors can be checked by ohming them out- should read between 10-14 ohms. If they're over that, they're either out or on their way out.
broncoguy is offline  
Old 07-07-2004, 08:34 PM
  #3  
Senior Member
 
thumpyls's Avatar
 
Join Date: May 2004
Posts: 406
where do u plug the ohm meter to?
thumpyls is offline  
Old 07-08-2004, 04:51 AM
  #4  
mod or sell?
iTrader: (30)
 
internetautomar's Avatar
 
Join Date: Sep 2003
Location: Skokie (look it up)
Posts: 19,760
the injector's connector, if you can.
internetautomar is offline  
Old 07-08-2004, 06:49 AM
  #5  
Senior Member
Thread Starter
 
Iron_Curtain's Avatar
 
Join Date: Sep 2003
Posts: 106
Ok, I know how to use an ohm meter and such, but where are the connectors for the injectors? Do I have to remove any of the manifolds just to test these? Anyone have a write up on how to test them? Any help would be appreciated. Thanks
Iron_Curtain is offline  
Old 07-08-2004, 07:41 AM
  #6  
Senior Member
 
yelowd's Avatar
 
Join Date: Mar 2004
Posts: 134
Fuel pressure is easy to check. Go to the local autoparts store and get a fuel pressure gauge. The easiest place to check is at the Fuel Filter. Just pull the rubber off and attach to the T coupling (should be included with the pressure kit) and then run more rubber to the filter. You'll want to do it before the filter to check the pump, and then after the filter to see if that is causing you problems.

Actually, anyone know how often you should change your fuel filter? It's been at least 12,000 (in 3 mo's) miles since I did mine.
yelowd is offline  
Old 07-08-2004, 09:29 AM
  #7  
Senior Member
 
ChrisCheezer's Avatar
 
Join Date: Oct 2001
Posts: 1,764
my injector harness/connectors have green crap built up inside of them, wire to connector side, when i move then around the car almost dies.... does anyone have this problem

i tryed cleaning all the stuff out with connector cleaner and dielectric grease but i cant get in the top of thoes little connectors , (under the boots, cuz there split open), has anyone replaced these parts?
ChrisCheezer is offline  
Old 07-08-2004, 09:44 AM
  #8  
mod or sell?
iTrader: (30)
 
internetautomar's Avatar
 
Join Date: Sep 2003
Location: Skokie (look it up)
Posts: 19,760
try a dentists pick.
internetautomar is offline  
Old 07-08-2004, 10:37 AM
  #9  
Senior Member
 
Tarzan's Avatar
 
Join Date: Mar 2002
Location: Ontario, Canada
Posts: 1,114
The fuel filter has to be replaced every 48000 km or every 2 years approx.
And my injector connectors are virgin clean, like new. 140.000 kms and 11 yr. old car.
Tarzan is offline  
Old 07-08-2004, 12:25 PM
  #10  
Donating Maxima.org Member
 
broncoguy's Avatar
 
Join Date: Mar 2003
Posts: 541
Originally Posted by Iron_Curtain
Ok, I know how to use an ohm meter and such, but where are the connectors for the injectors? Do I have to remove any of the manifolds just to test these? Anyone have a write up on how to test them? Any help would be appreciated. Thanks
On the VG engine, you do have to remove at least part of the upper intake to get to the connectors. They are held on by little U shaped clips. Take the clips off by sliding them off the connector- then the connector will pull off straight up. Once you have the connector off, you'll see the 2 pins on the injector. There's your contacts for the meter.
broncoguy is offline  
Old 07-12-2004, 02:34 PM
  #11  
Senior Member
Thread Starter
 
Iron_Curtain's Avatar
 
Join Date: Sep 2003
Posts: 106
Originally Posted by broncoguy
On the VG engine, you do have to remove at least part of the upper intake to get to the connectors. They are held on by little U shaped clips. Take the clips off by sliding them off the connector- then the connector will pull off straight up. Once you have the connector off, you'll see the 2 pins on the injector. There's your contacts for the meter.
Thanks a lot man. I will try that this weekend.

Originally Posted by yelowd
Fuel pressure is easy to check. Go to the local autoparts store and get a fuel pressure gauge. The easiest place to check is at the Fuel Filter. Just pull the rubber off and attach to the T coupling (should be included with the pressure kit) and then run more rubber to the filter. You'll want to do it before the filter to check the pump, and then after the filter to see if that is causing you problems.

Actually, anyone know how often you should change your fuel filter? It's been at least 12,000 (in 3 mo's) miles since I did mine.
Thanks, do you happen to know what pressure our cars should be reading when I check it?
Iron_Curtain is offline  
Old 07-12-2004, 04:42 PM
  #12  
mod or sell?
iTrader: (30)
 
internetautomar's Avatar
 
Join Date: Sep 2003
Location: Skokie (look it up)
Posts: 19,760
Originally Posted by Iron_Curtain
Thanks, do you happen to know what pressure our cars should be reading when I check it?
VG = 43.4
at idle :
VE = 36 (with vacuum connected)
VE = 43 (without vacuum connected)
internetautomar is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BkGreen97
Maximas for Sale / Wanted
2
04-02-2016 05:47 AM
gustavison
6th Generation Maxima (2004-2008)
4
10-04-2015 06:50 PM
bumpypickle
4th Generation Maxima (1995-1999)
10
09-20-2015 08:22 AM
aminus21
4th Generation Classifieds (1995-1999)
6
09-12-2015 04:53 PM



Quick Reply: How to check fuel pump/injectors?



All times are GMT -7. The time now is 02:10 AM.