Question about 1985 Nissan Pickup
Changed plugs and it still runs poorly drove it down the road and when you get in the sweet spot it runs smooth but once you are under power it misses and or sounds like the plugs are fouled
Hi Ozzie,got your best of cd.,Do you still have the original carburator and over 100,000 miles,if so I recommend a weber carb.,the original ones start to go out and can't be fixed,had my 19 years,click on link to view.http://www.youtube.com/watch?v=v5Fe9N0q2Kk
Posted on Oct 25, 2012
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Posted on Jan 02, 2017
you have to eliminate several items
one at a time.
but it all comes down to three things air, fuel and fire.(spark)
disconect the gas line and see if the fuel pump is pumping at rated pressure you mayneed a gage for that, gas is dangerous be very careful dumping any amounts about, or disconect and see it squirt into a container ,again be careful. if you are confident that the streem of gas is strong. then it is not the fuel pump.
spark? The sensor for the spark plugs may be a pcm system which is a pulse hall effect sensor that sends a signal though a coil in the distributor. the steel in the coil may be getting rusty and swelling ( steel swells if it rusts ) the mettal plates in the center of the coil may be expanding and now are stretching the copper in the coil so now they are broken but just touching enough to run untill it gets to hot ( mettle expands when hot ) causing the hall effect sensor not to work propery all the time.
check the air cleaner for a proper filter to be clean.
mostly it is either fuel or spark.
Posted on Feb 21, 2009
SOURCE: poor idle
my truck was doing the same thing, i tried to adjust the idle screw and replace the ignition system but it didnt help. What i did was replace the carb with a webber and the problem was solved. I'm not saying to buy a webber but you might just need to rebuild your carb or something similar
Posted on May 12, 2009
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