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Topic: Loss of Spark

in Forum: C3 Engines


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Loss of Spark

Posted: 1/12/06 2:44pm Message 1 of 20
scott78
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fortlauderdale, FL - USA
Joined: 3/15/2004
Posts: 288
Vette(s): 1978 greenwood custom vette, 468 blower motor side pipes.
Car stopped after running for an hour. Let it sit about 5 minutes and it started back up. Thought I was out of gas so I put in a few bucks to get home. Once home car stopped again. Checked the fuel pump, it works, checked the spark off the coil, none. If I let it sit for a few minutes it will run then stop after a few.
Any ideas on what could be wrong ? Mallory pro-master coil and Mallory distributer.




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Loss of Spark

Posted: 1/12/06 3:32pm Message 2 of 20
daveb12
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KERNERSVILLE, NC - USA
Joined: 1/13/2004
Posts: 1355
Vette(s): 1968 L-71 convertible

Electrical is really not my forte', but I'd check the connections and wiring at the starter first. I've had similar issues when a wire gets too close to a header which is easy to do because of the proximity.

 




Loss of Spark

Posted: 1/12/06 4:03pm Message 3 of 20
Ron 78
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BINGHAMTON, NY - USA
Joined: 7/19/2003
Posts: 3808
Vette(s): ......
No spark,try VIAGARA,I'm with daveb12,sounds like a wire shorting out,


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Loss of Spark

Posted: 1/12/06 4:37pm Message 4 of 20
lost in the 60's
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Newark, CA - USA
Joined: 4/29/2004
Posts: 350
Vette(s): 1969 Corvette 4-speed ZZ-4 crate Monza Red
Just for the heck of it, are you running a MSD 6a box?
I had the same thing happen to me, it would just stop running, then it would start back up again.
I found the wire connector that came with the unit was no good...(the kind that snap down) I used a good connector and that fixed it....but it took me all summer to find it.
Good luck,
Ken


Loss of Spark

Posted: 1/12/06 7:39pm Message 5 of 20
daveb12
Former Member
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KERNERSVILLE, NC - USA
Joined: 1/13/2004
Posts: 1355
Vette(s): 1968 L-71 convertible

[QUOTE=Ron 78]No spark,try VIAGARA,I'm with daveb12,sounds like a wire shorting out,[/QUOTE]

Hmmm, 53 years old. single, no dating prospects and this guy suggests VIAGRA? What's a man to do?????????????????




Loss of Spark

Posted: 1/12/06 10:07pm Message 6 of 20
scott78
Former Member
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fortlauderdale, FL - USA
Joined: 3/15/2004
Posts: 288
Vette(s): 1978 greenwood custom vette, 468 blower motor side pipes.
Have mallory everything in ignition. Does anyone know what the small black box connected to the distributor and the coil does. It appears to have opened due to the engine heat and I am wondering if this could be my problem ??



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Loss of Spark

Posted: 1/13/06 3:47pm Message 7 of 20
scott78
Former Member
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fortlauderdale, FL - USA
Joined: 3/15/2004
Posts: 288
Vette(s): 1978 greenwood custom vette, 468 blower motor side pipes.
Found out it was a filter of some sort. removed it and the car seems to be running now ? I willl not go far from home right away. Did a compression test because I am losing water somewhere? Everything seems to be in range. All cyl are 155-160, except 5 and 6 which are 148. Does this seem out of line.
If I have a cracked headinstead of a gasket would I notice it in the compression ?




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Loss of Spark

Posted: 1/13/06 8:31pm Message 8 of 20
Ron 78
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BINGHAMTON, NY - USA
Joined: 7/19/2003
Posts: 3808
Vette(s): ......

5+6 are across from each other not next to each other,it would have to be 3or 7




C3VR Lifetime Member #93

Loss of Spark

Posted: 1/14/06 6:57am Message 9 of 20
scott78
Former Member
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fortlauderdale, FL - USA
Joined: 3/15/2004
Posts: 288
Vette(s): 1978 greenwood custom vette, 468 blower motor side pipes.
no it is 5 and 6 . they are across from each other. my concern is the compression ok or does it indicate anything ?



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Loss of Spark

Posted: 2/6/06 2:06pm Message 10 of 20
Bobs68
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RED BLUFF, CA - USA
Joined: 12/8/2005
Posts: 22
Vette(s): 1968 427 producing 550 hp at rear wheels. Color is Black. This car didn't have a place for a spare tire, or didn't come with an emergency break. The car only has 44,237 origonal miles. License is TERMN8R

Scott, you might do a pressure check on your radiator to see where you are losing water.  If it is a cracked head or a bad gasket, it should show in either of the low cylenders or show up in the oil.

Bob

 




in Forum: C3 Engines


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