I have a 68 1600 R16 engine.
The car runs good for 45 minutes or so. Then it begins to backfire. This
backfire is toward the manifold or carbs not through the tailpipe. If I am
going 45 mph and it begins to backfire, no matter how much or how little
throttle I give it it continues to backfire and rolls to about 5 MPH. At this
point it has NO power what so ever. I can stop the car and wait 20 or 30
minutes, it will start and then go for a little while and do the exact same
thing. So here is what I have had done so far:
1.) Replaced thermostat and radiator
2.) Engine rebuild
3.) Replaced carbs (from Z-Therapy)
4.) Replaced fuel pump, fuel line and fuel tank
Conditions that occur each time:
1.) Temp gauge goes to 220
2.) Oil Pressure gauge starts to look like a tach, jumps from 20 to 40 and
then to zero. While it is backfiring and you are giving it gas, the oil press
gauge moves up and down the way a tach would do it.
3.) Backfires
4.) Engine is on but the car has NO power.
Observations:
1.) There is NO steam or overheat conditions at the radiator that would
suggest that it is over heated, no antifreeze in the oil
2.) No oil leaks
Any suggestions would be greatly appricated.
Chuck
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