HT4100 4.1, 4.5, 4.9 Discussion, Distributor Sound in Cadillac Engine Technical Discussion; Cranking is what I think I have seen others mention as the "diesel like" sound. Its only during running time(s). ...
Cranking is what I think I have seen others mention as the "diesel like" sound. Its only during running time(s). The ignition and start only make the normal sounds. Right now I am about to adjust the alternator pulley because I think I over tightened it, not sure if is having any affects. Also have a feeling I need some spark plugs checked, otherwise the slap sound I get during some points of acceleration has me lost. So the distributor isnt making noise is the new alternator apparently. Still need to figure out whats causing the intermittent starter delay. It turns over like its got a dying battery at times. Stumped.
Cranking isnt a sound... the term refers to when the starter turns the motor to start combustion. The sound you hear is likely knocking/pinging/detonation/spark knock. You should check the ignition timing, EGR operation, engine operating temperature, and proper octane rating. All of those can cause knock.
Yea. The timing is what I think is doing it. Gas is correct and temp is right. Just need to test the spark and timing. When the engine starts correctly it just purs..... otherwise its a pat pat pat sound amidst acceleration. Likely correct on your guess.... will post back after checking it over
No sound other than usual starter noise. Minus the excess time it takes to turn over. about 4 seconds now. But randomly take a split second like new to ignite. The pinging I had is now gone from removing and attaching the spark plug lines. also cleaned off a couple of the plugs to the distributor and so thats done. Now after testing if it was in fact a battery issue or not I have I think concluded my starter is just worn. It has the same start up speed while jumped to a charger as without. Not sure what else could be behind a slow turn over start up minus the starter itself.
Also I popped off the distributor top today and the entire frame around the ignition coil, or module forget, has rust. Would this be enough to throw operation of it and mess with the start up? if at all an issue even.
Maybe the timing is advanced too far, and bucking the starter a bit (?) The rust in the distributor in not uncommon.
When the bushings in the starter get worn, the armature may start rubbing on the field poles, which defeats some of the pull of the fields, and adds drag to the armature.
Maybe it's time for a rebuilt starter......... One thing at a time, and you will get it fixed OK.