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Discussion Starter #1
Ok i replaced every sensor on this engine. I did the plugs wires cap and rotor. (I got platinum plugs Autolite) I got the timing on 10 degrees with the spout connector out the only thing i haven't replaced is the COIL got a whole new distributor. new intake gaskets upper and lower had em both cleaned. new injector O-rings and caps. new vacuum lines new PCV and fuel and air filter. The only sensor I ignored is the Knock Sensor. I got 35-40 PSI fuel pressure. And i still cant get it to start when it is in the 4 degrees out. Seems like it isn't firing properly? The engine at idles like to backfire when in drive when i get it out to drive it will not backfire it is like small pops only felt in the gas pedal once i get it warm it will run fine and start fine threw out the day. This engine runs and runs mint except the popping when i get to a stop but it will not do it all the time? This is an 87 vulcan with 116,000 with a new tranny i need to get it working after all i only had the tranny done about a month ago now i basically got a new motor that still wont run properly i need help bad.
 

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Just a suggestion but have you done a compression check. The popping might by a burned valve.
 

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QUOTE
The engine at idles like to backfire[/b]
When you changed the Distributor did you replace the T.F.I. module too?
If you spent all that cash already for Peace of Mind I would change the Coil Pack too. Go to your fav Junkyard and grab'em both.
 

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This could be the problem. With marginal compression rings the engine would have very little compression when cold, but when warm with an oil film the compression goes up considerably. Or a worn camshaft and lifters that are bled down when cold there by not opening the valves until pumped up with oil.
 

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Originally posted by JCC@Jan 19 2004, 11:47 AM
This could be the problem. With marginal compression rings the engine would have very little compression when cold, but when warm with an oil film the compression goes up considerably. Or a worn camshaft and lifters that are bled down when cold there by not opening the valves until pumped up with oil.
Dido with the compression. Might be time for the snake oil (Engine Restorer)If you find out you have low compression. This stuff will work if the wrings are just stuck with carbon from using dino oil. Its cheap and worth a shot.
 

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Discussion Starter #6
Yea replaced the coil and tfi i just didi the coil today to still no avail. Ive been waning to do the compression test but no one around had the adapter to fit my 3.0 the taper is wierd. Whats this OIL that your talking of i never heard of it? where can i get it?
 

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Make sure you didn't get a bad spark wire. I had a problem with my vulcan that i tried figuring out for like 3 weeks and I had a defective wire. Maybe you could try flushing your oil and coolant. My car seemed to idle better after i flushed the coolant.
GOod luck.
 

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My compression tester adapter has a rubber O ring after the threads, and looks like it would work on both flat and tapered seat styles, but I have not tried it on the vulcans tapered seat. The oil additive is called Engine Restorer can be found at any major parts store put it in after oil change.
 
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