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Triumph TR6 - Constant Miss

Hello Guys,
I have a bad miss that is there through every gear. I've balananced my carbs,the mixture is good according to the colour of my plugs, I installed new cap,rotor,wires,and vacuum retard.I have Fireball 700 electronic ignition.
Adjusted the timing 4 to 20 and everything in between but still no improvement.
Any thoughts ?
Thx
Charlie

Charlie
Glad to see I am not the only one with a miss problem...well... not really (glad). You have obviously read my thread..but it looks like my problem is slightly different. My balance and mixture are also dead on. I wonder if this fuel pump thing is the problem with us both???
Will you be at Bronte?
Rick C
Rick Crawford

Hi Rick,
I'm going to start with resetting everything under the hood tonite and see where it gets me...I'll let you know. My fuel pump has the glass bowl and while I rev the engine I watch the fuel level and it is right up at the top which to me indicates good pressure,
Yes I should be at Bronte and depending on the outcome I might drive a TR6 down !!
Charlie
Charlie

I had the same problem and I blocked off the vac. hose to the carbon cannister and that solved the prob.,it's an easy thing to check anyway.
Erik

Hi,
Well after re-checking everything with the help of a good TR6 friend we found the optical sensor for the EI was very picky on where it had to be. The car runs almost great but I still have a miss when going about 30mph in 3rd and 40mph in 4th, but as I accelerate it smooths out. I also noticed it seems worse the warmer the engine gets..I'm thinking it has to be something in the carbs.
I'll try the carbon canister hose tomorrow.
I'll be driving to the Bronte car show for sure now!!
Thx
Charlie

Hi Erik,
Do you mean the upper hose to the canister that connects to the valve cover or the lower small ones that goes from the carbs to the canister/fuel tank
I have a 75 TR
Charlie
Charlie

Charlie
Glad to hear you solved at least most of the problem.
The Carbon Canister has a restrictor on the top inlet from the carbs. If missing you will suck to much air. I think Erik meant the hose from carbs (valve cover) to the canister. This is something for me to try also.
I will be at Bronte...looks like the weather man is going to cooperate after all. I am easily recognized...not very many Saphire blue body/ shadow blue interiour TR6s with a 1971 (blue in colour...neat eh?) licence plate on the front.
See you there with MISS and all:)
Rick C
Rick Crawford

Hi Rick,
thanks, I'll try that hose tonight, since the problem worsens as it heats up I'm thinking of shutting off my bypass valves for a while and see what happens.
Today I avanced my timing and it runs even better but that slight miss is still there, luckily it's not constant so it's still fun to drive in this weather.
Looking forward to meeting you and others from our BBS.
I drive a white '75 and I'll wear my t-shirt that matches the car with my licence plate embroidered on it...TR RIFIC
See you at Bronte
Cheers
Charlie

Hey guys,yes I mean the hose from the manifiold or the carbs in my case,in my manual it says the cannister should be replaced at around 50,000 miles.Have fun at your car show,I will be in one here in Colorado on Sunday.It's fun to meet other people who enjoy their British cars even with all of their little "problems"
Erik

Ha Erik
We do not have problems....we have chalenges:)
Is that also say...50,000 miles or 30 years which ever comes first. Enjoy your car show...I look forward to meeting the others from our BBS.
Charlie , cool plate!
Rick C
Rick Crawford

Hi,
Well after some heavy thinking about how my missing problem got worse as the car warmed up I removed my temperture compensators (which I set up with the hot water and thermometer in the spring).
I taped the holes on the carb with good 'ole duct tape and the miss has gone !! car runs great now. I pulled over and removed the tape and went for a short drive and the miss was back. I'll put the TC's back on but I'll adjust them for little or no opening for now.
Thanks for everyone's help.
Charlie
Charlie

Boy - All I can say is that I'm sure glad I bought a TR3A. It is so simple. I don't need all the "CHALLENGES" that you TR6 owners love to conquer. What a smozzle with all that stuff you have to deal with ! Good luck at Bronte.

Don Elliott, 1958 TR3A
Don Elliott

This thread was discussed between 12/09/2002 and 14/09/2002

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This thread is from the archive. The Live Triumph TR6 BBS is active now.