Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk

Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


Reply
 
Thread Tools Display Modes
Old 06-14-2010, 11:23 AM   #1
Triperformance
Leaky Injector
 
Join Date: Jan 2008
Location: Maryland
Posts: 62
Trader Rating: (0)
Triperformance is an unknown quantity at this point
Feedback Score: 0 reviews
Check your fuel pressure regulator and make sure it's functionng properly with and without vaccum. Do you have any codes/ check engine light on?
Triperformance is offline   Reply With Quote
Sponsored Links
Old 06-15-2010, 09:30 AM   #2
jdm_dean
 
Join Date: Oct 2009
Location: Raleigh
Age: 38
Posts: 40
Trader Rating: (0)
jdm_dean is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by Triperformance View Post
Check your fuel pressure regulator and make sure it's functionng properly with and without vaccum. Do you have any codes/ check engine light on?
No check engine light. How would I check? Disconnect the vacuum line and see if the idle changes?
jdm_dean is offline   Reply With Quote
Old 06-16-2010, 11:38 AM   #3
Triperformance
Leaky Injector
 
Join Date: Jan 2008
Location: Maryland
Posts: 62
Trader Rating: (0)
Triperformance is an unknown quantity at this point
Feedback Score: 0 reviews
Hmm, yes you can pull the vaccum line and see if idle changes. It could be possible you have a fuel injector issue (staying open). When was your fuel filter changed last as well?
Triperformance is offline   Reply With Quote
Old 06-17-2010, 09:26 PM   #4
jdm_dean
 
Join Date: Oct 2009
Location: Raleigh
Age: 38
Posts: 40
Trader Rating: (0)
jdm_dean is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by Triperformance View Post
Hmm, yes you can pull the vaccum line and see if idle changes. It could be possible you have a fuel injector issue (staying open). When was your fuel filter changed last as well?

It was changed about a month ago.

Only thing thats not leading me to believe its a fuel issue is that its just rich initially. Like once its running it runs fine other than a bog around 2500 rpm and when you floor it in a high gear, which i think is due to improperly gapped plugs, forgot to gap them once i put them in.

Its just once it first starts cold it wants to die unless you gas it and hot starts it wants to die unless you gas it but 2 mins later it will stay on by it self and drive fine.
jdm_dean is offline   Reply With Quote
Old 06-18-2010, 03:52 PM   #5
jdm_dean
 
Join Date: Oct 2009
Location: Raleigh
Age: 38
Posts: 40
Trader Rating: (0)
jdm_dean is an unknown quantity at this point
Feedback Score: 0 reviews
Okay so I got it fixed. Checked my tps it was out of calibration, was at .39 and should of been between .45-.55. Got that set and got a new temp sensor from the junkyard, car cuts on every time now with no gas given.

Figured it out because when i disconnected the NEW ECT, it would idle lower and when revved it would backfire out the ass which is a sure sign of too much fuel. Reconnected it and idle raised, no backfire.

So if anybody has the same problem, definately check your tps and coolant temp sensor.
jdm_dean is offline   Reply With Quote
Old 06-18-2010, 04:10 PM   #6
Neejay
Post Whore!
 
Neejay's Avatar
 
Join Date: Jan 2004
Location: lol
Age: 39
Posts: 2,586
Trader Rating: (2)
Neejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfectionNeejay is close to perfection
Feedback Score: 2 reviews
Quote:
Originally Posted by jdm_dean View Post
Okay so I got it fixed. Checked my tps it was out of calibration, was at .39 and should of been between .45-.55. Got that set and got a new temp sensor from the junkyard, car cuts on every time now with no gas given.

Figured it out because when i disconnected the NEW ECT, it would idle lower and when revved it would backfire out the ass which is a sure sign of too much fuel. Reconnected it and idle raised, no backfire.

So if anybody has the same problem, definately check your tps and coolant temp sensor.
Thanks for the update. I'll check my TPS voltage...
Neejay is offline   Reply With Quote
Reply

Bookmarks



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 03:48 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
vB.Sponsors
Copyright ? 1998 - 2022, Zilvia.net