85 problem
Thread Starter
Intermediate
Joined: Feb 2012
Posts: 31
Likes: 0
85 problem
Ok first let me say I hate to start off being a forum user this way. secound Im not much of a gm fan. I am a ford fan but figured what the heck I wanted to mess with a vette for a change. So story goes, I bought this 85 vette and drove it all the way home from florida. I live in ST.louis. I got home andchange plugs,wires,cap and rotor. I start the car up and it runs for 45 sec-1 min and then shuts off like someone unplugged it. now when I crank it over the security light flashes and I have no spark. where do I start? is there a issue with the security system
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Did your problem start immediately after you changed the parts? If so then go back and double check all. Make sure that the wires to the distributor cap are snug. If the battery wire to the cap is loose, it might cut of power to the cap after the engine turns a couple of times.
Thread Starter
Intermediate
Joined: Feb 2012
Posts: 31
Likes: 0
yes I went through it several times. the thing that bothers me is I dont remember the security light flashing when I turn the car over. I have check and have power to the coil, I even changed the coil out with a new one thinking that may be the issue. Like I said we drove this car 1000 miles home and all i did was cap,rotor,plug and wires. now I have also changed out the coil. when I check for spark when I turn it over I got nothing. I guess I might as well change out the pick up also
Burning Brakes
Joined: Jun 2003
Posts: 1,079
Likes: 1
From: Niagara Falls ON
Are you sure that you plugged everything in correctly? If you changed the coil did you make sure that everything was put back the way it should?
Are the tach and power wires going to the distributor plugged in?
If there are the only things that you changed then you should look everything over again.
Are the tach and power wires going to the distributor plugged in?
If there are the only things that you changed then you should look everything over again.
Thread Starter
Intermediate
Joined: Feb 2012
Posts: 31
Likes: 0
yes Im possitive. but that doesnt help the security light flashing when it turn over. Like i said everything was tested, power to the coil,ground and tach wire. Thats why I replace the coil to see if may it freakishly went bad
Burning Brakes
Joined: Nov 2001
Posts: 1,189
Likes: 2
From: Austin TX
At the back of the engine just below the distributor there is an oil pressure switch. If the engine doesn't build oil pressure after it's first started, then the fuel pump won't run. The fuel pump is energized when you first turn the key on which allow you to start the engine, but then the circuit connected to this oil pressure switch needs to close in order to keep the fuel pump running. It sounds like perhaps this connector might have gotten knocked off when you were working with the distributor on your tune-up. Something to check for.
Team Owner
Joined: Jan 2003
Posts: 20,254
Likes: 221
From: Summerland B.C. Canada
Follow the diagnostic chart and see if it leads you to the problem.
http://members.shaw.ca/corvette86/Ig...System-EST.pdf
http://members.shaw.ca/corvette86/Ig...System-EST.pdf
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Le Mans Master
Joined: Jul 2004
Posts: 6,213
Likes: 694
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Le Mans Master
Joined: Jul 2004
Posts: 6,213
Likes: 694
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Ok first let me say I hate to start off being a forum user this way. secound Im not much of a gm fan. I am a ford fan but figured what the heck I wanted to mess with a vette for a change. So story goes, I bought this 85 vette and drove it all the way home from florida. I live in ST.louis. I got home andchange plugs,wires,cap and rotor. I start the car up and it runs for 45 sec-1 min and then shuts off like someone unplugged it. now when I crank it over the security light flashes and I have no spark. where do I start? is there a issue with the security system
