• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

TR6 74 TR6 headscratcher

Share this page

Actually found a large leaf in the tank after suffering for years with intermittent fuel problems.
I know it was the 5 year old that lived next door to us in the fall of 77.
 
I want to add to something Sarastro and Nutmeg have mentioned, but slightly different. What EWD is mentioning as symptoms are quite similar to what was happening to me two weeks ago. After a new fuel pump, replaced coil, readjusted floats and carbs, I returned to the ignition and found the problem.

I had used a voltmeter and confirmed proper voltage from the ignition to the coil, but I wasn't thorough enough. I reconnected the voltmeter and wiggled the main power feed to the coil and suddenly the problem was clear. There was a break inside the wire insulation leading to the coil. While wiggling, I had 0 volts, 3 volts, 5 volts, 11.5 volts--basically all over the place.

My entire issue--cutting out while driving, and after warm-up, was that defective wire. My car now runs like new.

Not saying this will be EWD's problem, but I sure know I'll be more careful next time before jumping to conclusions.

And, BTW, isnā€™t the general rule, known to all old-timers, that the problem with your fuel/carbs is your electrical/ignition?
 
Last edited:
mctriumph said:
Actually found a large leaf in the tank after suffering for years with intermittent fuel problems.
I know it was the 5 year old that lived next door to us in the fall of 77.
Click to expand...
I've mentioned this before, but I still have a picture of myself at age 20 (see below) holding my TR4 fuel tank that I removed to retrieve a 12" piece of 1 X 2 wood that some jerk dropped inside the tank while the prior owner had the car. I had stalled at least 6 times in traffic, had mechanics opine that I needed an engine rebuild, installed two different fuel pumps, and gone thru innumerable checkup exercises before I finally saw that thing floating in the tank. An unforgettable memory.
 

Attachments

  • Gas Tank.jpg
    Gas Tank.jpg
    81.6 KB · Views: 44
KVH said:
I've mentioned this before, but I still have a picture of myself at age 20 (see below) holding my TR4 fuel tank that I removed to retrieve a 12" piece of 1 X 2 wood that some jerk dropped inside the tank while the prior owner had the car. I had stalled at least 6 times in traffic, had mechanics opine that I needed an engine rebuild, installed two different fuel pumps, and gone thru innumerable checkup exercises before I finally saw that thing floating in the tank. An unforgettable memory.
Click to expand...
I now use lockable fuel tank lids.
Charley
 
Well. The head scratcher has been solved. It was the ignition switch. I installed a new switch a couple of years ago during the restoration. The little locking tabs on the harness plug were not secure and the plug became loose. It finally came out yesterday and became obvious. (I did add a round of electrical tape on the plugā€¦..). Thx to all. The TR certainly feels better.
Will
 
EWD said:
Well. The head scratcher has been solved. It was the ignition switch. I installed a new switch a couple of years ago during the restoration. The little locking tabs on the harness plug were not secure and the plug became loose. It finally came out yesterday and became obvious. (I did add a round of electrical tape on the plugā€¦..). Thx to all. The TR certainly feels better.
Will
Click to expand...
Thank you for letting us know the cause. It lets me know one more cause for the symptoms that your car experienced.
from this example, I would say that if the car suddenly dies with no chugging or popping that it is most likely ignition. But then there is always something different about each case.
Charley
 
EWD said:
Good thought Charley. Itā€™s a new coil, installed same time as the electronic ignition. Guess it could be bad. Reading 1.7 across the contacts while idling.
mrv8q - yep on the interlock and relay.
Thx
Click to expand...
Just because a part is new doesn't mean its good . I replaced the plug wires and distributor cap a while ago for preventive maintenance. The 74 TR6 that was running fine before this, wouldn't start. I put the old cap back on and everything was fine. It seems to be some quality issues with some new parts. If you could swap parts one at a time with a car that's running well to see if you can nail down the bad part. Also checking for loose connections is a great first step. I bought my 74 TR6 new and just unplugged the connection under the seat to disable the seat belt interlock. Maybe later years made it harder to defeat. Good luck.

Bob
 
Back
Top