Hey guys, I am trying to get my 75 out and about again so I can finish what I started on the restoration. It has been sitting for about 7 months now. After I jumped it off, I ran it for about 4 miles and it just stalled. No sputtering or anythign like that, just quit. The dash lights and such were still on, and it would turn over, but not start. I towed it home and tried it again and it started right up. I let it sit for a couple of days and tried once more and again I drove it about 3-5 miles and the same thing. Almost as if it is loosing fire. Any ideas why it might be doing that?
08-24-11, 02:35 PM
sounds like it's either flooding or maybe a choke problem?
08-24-11, 02:46 PM
It could come from a bad gas pump. When the pump starts getting hot, it dies. When it cools down, pump works again. Try starting engine, wait until it dies and then try to refresh gas pump with a wet rag around it. If after 2-3 minutes it can start again, thatīs the problem.
Well I replaced the gas pump last night. Upon test driving it, is when it did it the second time. Now it won't even make it start with starting fluid sprayed directly into the carburator. I just talked with my dad, who is home piddling with it and now it won't start at all. It does crank but won't start. So I think I may have narrowed it down to the ignition (fire), but i think there are three main parts to the distributor...coil, iginition control module and pick-up coil. What is the difference in the coil and the pick-up coil, and which would most likely cause this symptom?
08-24-11, 06:45 PM
If the engine not even makes an attempt to start, then probably itīs a problem with ignition. Have you tried to get out a spark plug, and touching metal with ground (engine block, body...) see if there is any spark? I take for granted plugs are new or tested. The pickup coil is inside HEI distributor. It has a ring shape with 2 wires attached to it. The coil is just under distributor cap assembly cover. Maybe problem comes from this part. I have a Chilton repair manual for Cadillacs containing a HEI system test. If you need it I can transcribe it for you.
Well I had the Ignition Control Module tested and it tested bad. My dad is, as we speak, replacing it now. Hopefully, at $25, this is the problem. I will let you guys know as soon as I find out.
08-25-11, 10:45 AM
$25 is a nice cheap fix. hope it works :)
08-25-11, 11:49 AM
Iīm glad the breakdown is located. :) Waiting for the fixing results. Youīre lucky your dad helps you in the car restoring. Mine does not like old big cars at all :lol:
You are right. It is great to have my dad help. He is not so much interested in the restoration process, but he is a good mechanic and doesn't mind helping me out with it.
I just talked to him and he said the it appears to be fixed. He did replace the ICM and that seemed to have fixed it.