Nissan: Fuel Pump?

Hi all,
My '89 240SX hesitates when I leave from a stoplight about
once a week and from what I can tell, it looks like I need a new
fuel pump. The throttle sensor gives me the variable ohms when
moved, so I believe it is good. Anyone out there have any other
suggestions on possible things to check? Car was running perfect
before this started. I was planning to get one of those Walbro
pumps off ebay for $84, are these worth the money?
Thanks for any replies!
Johnboy

John
Hesitation could be caused by several factors, (from the very simple of things to the most pain
in the ass to troubleshoot!!). Best just to start with the easiest items which may cause your
hesitation problem:
Before you start though, place your vehicle's engine control unit, (ECU), into Diagnostic mode &
check for Diagnostic Trouble Codes (DTC's). A diagnostic code could point you in the proper
direction in repairing your hesitation problem.
To put the ECU into diagnostic mode go to the 240SX Car Club of America Website at:
www.240SX.org
Once the webpage opens, scroll down and click on the 240SX FAQ link. This will open up another
webpage with multiple links on the left side. Scroll down those links till you get to ECM,
reading troublecodes SOHC - click on that link. Instructions on how to put your ECU into
Diagnostic mode should then pop up. Follow the directions & post your results.
If no DTC's pop up when you have the ECU in diagnostic mode, then do the following:
1). Replace your air filter
2). Replace your fuel filter
3). Do a tune up - check/replace your spark plugs along with distributor cap & rotor.
4). Check and readjust your timing if needed.
5). Clean out your throttle body with a can a carburator cleaner
6). Pour a bottle of fuel injector cleaner in your gas tank when you fill it up with gas.
7). Check for vacuum leaks around the intake manifold, fuel pressure regulator & EGR system
8). Check and adjust your throttle cable that runs from your gas pedal to the throttle body
linkage.
Try doing all the above BEFORE you go out and replace your fuel pump. The above may fix your
problem. If it doesn't, then you may want to consider posting your 240SX car problem to the
240SX Amarok.Org mailing list. The 240SX Amarok mailing list is a FREE mailing list where you
can post all your Nissan 240SX related questions to. Subscribers to the 240SX mailing list are
spread out thru out the entire United States & Canada & may be able to assist you with your
hesitation problem. You also might be able to find a local 240SX chapter in your neck of the
woods. To subscribe, just click on the attached link & follow the instructions:
http://www.amarok.org/modules.php?name=Sections&op=viewarticle&artid=1
Don't let the dinky-looking webpage fool you. Once you subscribe to the mailing list you'll be
amazed by all the knowledgeable 240SX owners that are out there AND that are willing to help you
out. Give it a shot...doesn't hurt.
Anyhow, good luck with the troubleshooting...
ID
1995 240SX SE
....member...SoCAl240SX.org





Johnboy wrote: