A 93 ram 150 318 engine bay search comes up with a carby set up
will reply to that set up
how many miles on the engine
any other issues other than fouling plugs ?
running rich ?
anti pollution or EGR valve not working properly
carboned up intake manifold
poor cylinder compression
if not
could have hardened oil stem seals and the oil is dribbling down the valves into the combustion chamber
you wont see smoke out the tail pipe
valve stem seals can be replaced with the heads on
you could go to iridium plugs
SOURCE: 1994 gmc pickup turns over
Do you have a little screw driver? there is a fuel pressure test port take the cap out now be carefull when you do this crank it and at the same time press the shrader does gas come out like alotnot just a little but alot if it does then the fuel pump works now if it dribbles then your fuel pump failed,Okay if the fuel pump works the only thing that is left is the coil and ignition control module, before you decide to do the module or the coil the number on reason for it not to start is connection to the coil I see this all the time go to the coil connection and have some one crank it while you wiggle it and see if it start then.now if it still doesnt start youll just have to test for spark and if there is no spark your best solution is to replace the whole distributor why because there is a relector that has always failed even when it gives spark. and fuel because as a timed unit it gave fuel and spark at the wrong time here use the picture included in #1 wiggle connection #2 check for spark
SOURCE: I HAVE A 1993 CHEVY S10 BLAZER RUNS GREAT BUT NOW
I pretty much had this same problem what your problem is going to be is more than likely you have a pin hole leek in one of the fuel lines inside the plenum .
SOURCE: plug wire burn spots, spark plugs fouling, loss of power, misfire
optispark distributor fails. go to summitracing.com and search optispark. it'll pop right up
SOURCE: 93 mercury topaz error codes 32 35 54 56 73
check fuel pump or relay
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