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losing power due to lack of spark
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Icarus
New User
Oct 24, 2011, 1:53 PM
Post #1 of 2
(1231 views)
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losing power due to lack of spark
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Hi everyone.... 
I usually fix my car on my own and have the answers to any car problem but I have hit a wall. I drive a 1976 Datsun 140Y, it’s a 1400cc engine, carb and it still works with a full rotor distributor.
Symptoms: Very loud backfire in exhaust and carb.
Car jerks back and forward badly due to backfire
Car loses 75% of power, and battles to stay on (if I don’t rev it up it will die).
Gets so bad that the car looses all power and stalls.
After stall car will turnover but not start, I have to keep on turning it over for 5 min until it will start.
Custom added rev counter (that is connected to the coil) moves totally irregularly up and down.
Saturday I had a look at my car to see if I can’t sort this out, got a new coil and did a general overhaul. After installing all new parts I start the car, no change, check the timing and to set the timing i need to turn the distributor manually by hand...
One thing I did note is that when the engine is running you can't touch anything electrical, it shocks me, so that is why I thing imp losing spark.
What makes it odd is that the backfire is very random, and sometimes it all stops and drives 100% fine, then sometimes the problem comes for one min and is gone the next. This weekend was the worst, was backfiring and stalling everywhere.
Any, any help would be appreciated.
Regards
Icarus
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 24, 2011, 3:53 PM
Post #2 of 2
(1207 views)
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Re: losing power due to lack of spark
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Check all your ground wires and make sure none are missing between the engine and body and engine and battery.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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