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80 tr7 losing power

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Hasbeen
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Postby Hasbeen » 03 Sep 2009 04:19

Yes, I had the same rust problem, Edward. This is often our problem
with these cars, particularly if they haven't run for a while.

With that US spec car, I had excess fuel pressure, an exhaust valve
sticking not quite shut, rust comming from the fuel tank, one worn
float valve, petrol in one plastic float, & a crook wire [broken,
but touching inside the insulation] to the coil.

Every time I thought I had the problem sorted, I found a new one. I
fitted a pressure regulater, but it used to stop the fuel flow
entirely, when ever it got a dose of that rust.

Still, the young bloke who bought it from me, after it was sorted,
drove it to uni for 3 years, with virtually no problems, so it's
worth the effort.

Hasbeen

john lewis
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Postby john lewis » 06 Sep 2009 11:42

hi just a little update i went 100 mile yesterday and plan on going 150 today except for the doz.times it flooded little car worked great i have a ? could i blow back tru the carbs if i take fuel tank cover off just to make sure there is nothing in lines i drained tank and flushed tru filter wondering if from filter to carb can be blown out with compressor i should get regulator this week maybe i should wait try that fix first what do u think

john lewis
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Postby john lewis » 06 Sep 2009 12:50

trying to get pic on site so u can see my baby think i have on home page trying hereImage

Hasbeen
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Postby Hasbeen » 06 Sep 2009 15:38

John, if you are talking about flushing a clear or semi clear,
plastic inline filter, it's not much use. They don't clean well at
all. They are only worth a couple of bucks, get a new one.

As far as blowing back through the pump, it's no go there, either.
These pumps are a suck/blow device, that's all they do really. As
the diaphragm is worked up & down, they alternately suck, & blow.

They have 2 popet valves. When the pump sucks, the one on the
tank/supply side is sucked open, to allow fuel to be drawn from the
tank, while the one on the carb/delivery side, is sucked shut, to
stop fuel being drawn from that side.

With blow, the tank side valve is blown shut, nothing can go back to
the tank, the carb side one is blown open, fuel flows to the carbs.
There is a little bit more, but does not effect this basic function.
So you can not blow back, through the pump.

So, take the supply hose off the pump, & blow back on it, to the
tank. When you are fitting the regulator, take the hoses off the
carbs, & blow from the pump end of the hose, to clear the pipe, &
hoses, before you fit it.

To be sure everything is clean, take the top off the pump, & clean
the strainer in there, & the whole lot should be like a whilstle.

I hope those down changes are getting nice & smooth, with all this
practice you're getting. Sure sounds like you're enjoying it.

Hasbeen

john lewis
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Postby john lewis » 07 Sep 2009 09:58

i dont need to downshift as much now what i do is i play with gas most of the time i give it gas till it catches it just keeps flooding till it comes out of it and then it takes off but u are right im enjoying it alot thanks out to all for help cause im having fun think today is ill check everything out after a couble hundred miles

nick
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Postby nick » 09 Sep 2009 01:51

John, unless you are absolutely sure this is a fuel problem, in other words, it can't be anything else because you know for sure, get your self a new coil. 30 bucks and you will be home free. Ask Jclay. Most fuel problems are electrical.

nick

john lewis
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Postby john lewis » 10 Sep 2009 10:16

here where im at it cost $55 but i put new coil in yesterday still same thing, hoping to pick up regulator today see if that fixes problem thanks

Image

john lewis
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Postby john lewis » 17 Sep 2009 08:52

a big THANKS to all u helped me i put in new gas regulator and i have gone about 50 miles and no problem hoping that i have fixed my flooding i joyrigged my remote shifter lever until i can get my bushings in so im driving and enjoying very minute of it thanks again to everybody out there u make it possible for guys like me to stay on the road

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PeterTR7V8
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Postby PeterTR7V8 » 17 Sep 2009 09:12

Hey that's great news. Go & thrash the living daylights out of it before it starts to get cold.

BTW, it's jury-rigged. Sorry to be a pedant.

Image
Never say die. At least not while you're still breathing.

Hasbeen
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Postby Hasbeen » 17 Sep 2009 15:31

Thanks for the feed back John. We may think we know the answer to a
problem, but without feed back, we are never sure.

Of course, you now become the resident expert on carb flooding.

Have a ball with that car. When sorted they are just so much fun.

Hasbeen

john lewis
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Postby john lewis » 26 Sep 2009 11:20

just to close this article i have gone about 200 miles and never once did i experience flooding, problem solved i would say,a big THANKS out there to all of u with your help im having a great time driving it,still needs work but it is very nice flooding is done, thanks again john

Image

Hasbeen
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Postby Hasbeen » 26 Sep 2009 12:10

John,
It's really great to have that one sorted. It can be hard with long
distance diagnostics.

Of course, it would have been quicker, if we'd listened to Peter,
the first time he suggested flooding.

Hasbeen

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