Work Continues – 1977 Triumph Spitfire

By Craig Ranson
By Craig Ranson

Managing Director – Bridge Classic Cars

Classic car technician Jon has once again been investigating the running issues facing our 1977 Triumph Spitfire. After his initial investigations and subsequent work with the brake fluid being used in the car, he has had to continue his work to find the cause of the running issues being experienced.

Jon stripped the carbs so he could thoroughly inspect them. He found dirt in both float bowls so these were blown out before Jon cleaned them out ready for reassembly.

The fuel lines were also blown out and the filter was removed and cleaned too. Jon found a small leak at the gearbox end of the fuel line so he fitted new seals to rectify the issue.

After this was all done, Jon balanced the carbs and rechecked and adjusted the ignition timing. Although Jon was keen to take our 1977 Triumph Spitfire out for a test drive to ensure everything was moving in the right direction, unfortunately, the weather was not suitable on his first attempt.

During his investigations, Jon bypassed the ballast resistor in the wiring loom by running the power wire directly to the coil. Doing this got the car running perfectly. Jon found an ignition-fed live wire which he traced back to the rear of the fuse box where he soldered the wire from fuse number 1 to the coil-positive terminal.

Jon tested everything and all was working as expected. The last thing to do was to tidy up the wiring and to refit the components.

Now that Jon has been spending some time with our Spitfire, it looks to be making good progress and will soon be back with its owner and on the road again.

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