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> ‘74 2.0 Bucking Only When Warmed Up, Runs great when cool
Jackba
post Sep 14 2019, 04:15 PM
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I originally started this as a “Won’t Start” thread and got a ton of help from the group. Prior to not starting at all I had a problem with bucking at all times, not just when warm.
The process of fixing the no start issue was lengthy and included the following:
Ultrasonically cleaned all parts of the distributor and oiled the plates
Changed condenser
Checked points and gap
Checked trigger points
Checked power to injectors using a noid light
Verified normal spray pattern of injectors
Checked CHT resistance
Removed fuel tank and cleaned sock
Verified hoses were not kinked
Replaced fuel filter
replaced bad relay board
Verified operation of relays
Checked fuel pressure.
Removed and cleaned FI grounds
Checked static timing
Cleaned near new TPS
Replaced fuel pump

Replacing the pump fixed the no start problem. Took the car for a quick drive and all was fine. Decided to install a Pertronix ignition module and change ignition wires at the same time. Car is running a 5 year old Beru blue 3.3 ohm coil.
Thinking I had everything solved I took the car out for an extended drive last Sunday. For the first 5 miles it ran absolutely great. Better than ever. Then it started hesitating and the hesitation got worse. It started bucking to a point where I didn’t think I could make it home, but I did.
Now I’m wondering what else I can possibly do?

Any suggestions would be welcome.

Thanks,
Jack
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