My classics in trouble need help!!!!!!!!!!

SR20Raf · 05-24-2007, 09:31 PM

Car sounding like its running on 3 cyl i tried everything and it seems too not go away any suggestions?

~KnuckleDuster~ · 05-24-2007, 09:56 PM

put your plug wires on the correct plugs. make sure the maf is plugged in.

SR20Raf · 05-24-2007, 10:03 PM

yep checked wires and plugs even checked maf and throttle

~KnuckleDuster~ · 05-24-2007, 10:06 PM

did you do any work prior to this happening? or did it just happen out of the blue?

SR20Raf · 05-24-2007, 10:10 PM

happen out of nowhere 3 weeks back at a trip too PA and then it went away know its been the same way for 4 days know

~KnuckleDuster~ · 05-24-2007, 10:17 PM

check all grounds and vac lines, nasty exhaust leak maybe?

SR20Raf · 05-24-2007, 10:28 PM

Ok will do thanks man

classicaddict · 05-24-2007, 11:01 PM

take brake clean or starting fluid and spray around the vacume lines, intake manifold gaskets, and all that good stuff. if the idle changes start looking for your problem in that area.

nismo94tuner · 05-24-2007, 11:12 PM

Double check everything and replace all components like spark plugs, wires, fuel filter. Check timing and TPS. Clean throttle body. Check you cat to see if its clogged. Follow also what the guys above me stated.

$$$entra · 05-27-2007, 03:28 PM

Remove all sparks and identify which cylinders are working. (One sparks should appear darker than other ones.) Swap sparks between a working cylinder and dark cylinder, let engine work for 30sec and remove sparks to find out if the good spark became dark. If it did, it means that your wires are shorting with engine (likely) or something wrong with distributer(less likely). If the swapped spark did not become dark, it means that the other dark spark is bad.

$$$entra · 05-27-2007, 03:37 PM

Other less likely causes might be:

One injector is clogged.
Electrical connection between ECU and one injector has oxidized.
Water entered engine either form the gas tank or head gasket.
Rusted and stuffed mafler.

blusteelsr20 · 05-27-2007, 07:53 PM

One of your injectors took a crap. Sounds too familiar, same circumstances. Check to see which cylinder is missing and if you are mechanically inclined take out the bad one and replace it with a new one from either Greg V or Courtesy Nissan. Get the o-rings too. Instructions on how to replace one should be in the Tech Library of the forums.

des_se-r · 05-27-2007, 08:22 PM

if you need stock injectors pm if thats the problem, i have three left