serious engine problems...help appreciated
01-25-2006, 12:59 PM
#1
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Join Date: Apr 2005
Posts: 18
serious engine problems...help appreciated
i tried to search for this, but i'm not nearly as car savvy as i'd like to be, so i'm not even sure if i'm explaining it right. any direction on this would be great, though, as i really need my car to start working so i can go to work 
at first it was massively hesitating when it was cold, sounding like it was misfiring. it'd idle low (at about 500rpms, maybe a bit less) until it warmed up completely, then it'd work fine. now when I turn it on it idles for about 5-10 seconds and dies.
at first it was massively hesitating when it was cold, sounding like it was misfiring. it'd idle low (at about 500rpms, maybe a bit less) until it warmed up completely, then it'd work fine. now when I turn it on it idles for about 5-10 seconds and dies.
01-25-2006, 02:12 PM
#2
Bad Speller
Join Date: Sep 2004
Location: Moreno Valley, CA
Posts: 1,832
seems like an aelectricla problem.. Uplug your battery, clean all the connectors on EFI harness. don;t miss any of them. then plug the battery back in, so now your ECU should be reset and if all your connections are clean that should knock out one of the problems wich would be hessittation. now for your Idling problem that might be timing. so try and set it to factory specs (15*) that;s all I can think of up the top of my head.
-Juanton
-Juanton
01-30-2006, 12:31 PM
#6
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Join Date: Apr 2004
Location: Bum Fak SD right now...
Posts: 139
Originally Posted by napoleonzheking
Run ECU check as well, it probably won't come up with anything, but u might as well just in case. and it only takes literally 5 minutes.
02-08-2006, 10:06 AM
#8
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Location: z junk yard
Posts: 1,271
i had the same problem with my 1990 300zx i had to change the plugs... spark plugs, and then i had to reset the computer.. just to find out my timming belt jumped one tooth.. but thats the way it was when i bought the car ... my alternator is shot on my 1990 300zx so im not driving it until i get it fixed check your fuel injectors connections as the ones on the 1990 300zx are not so good and some times it acts like it wants to stay on after i turn off the key...
02-10-2006, 10:48 PM
#9
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Join Date: Dec 2005
Posts: 352
Originally Posted by nismo619
i had the same problem with my 1990 300zx i had to change the plugs... spark plugs, and then i had to reset the computer.. just to find out my timming belt jumped one tooth.. but thats the way it was when i bought the car ... my alternator is shot on my 1990 300zx so im not driving it until i get it fixed check your fuel injectors connections as the ones on the 1990 300zx are not so good and some times it acts like it wants to stay on after i turn off the key...
If it feels like it wants to keep running after you shut off the key then the most likely (and cheapest) cause is a dirty throttle body. Easy enough to have a shop clean it and the rest of your fuel system for you.
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