Question about Triumph Tr 7

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I have a tr6 1975 and the engine back fires through the first carburetor why? number 1 carburetor, also has a problem with the carb piston raising up when running why? timing is ok. thanks m brown

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You are getting unequal fuel into the engine. You must find some one who knows how to balance dual carburetors. First, the idle AIR VOLUMNE must be balanced equal. Next, using the mixture control on each carburetor, the BEST RUNNING adjustment must be reached, Next, both pistons have to lift at the same time when accelerating. Adjust linkage as necessary.

Posted on Mar 20, 2011

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What is the clearance between the rocker arm and the valve spring in a GM 2.2L motor


there is no specification for what you want
the valve clearance is between the end of the rocker arm and the end if the valve stem
the stem end is proud of the spring retainer so if your rocker arm is touching the spring retainer , you have a big problem as for the procedure it is set out in the workshop manual but if you don't have a manual it can be done like this
you will need the firing order of the engine first
now adjust no 1 piston valves when the next piston to fire has the valves in the rock position
that is the exhaust valve just closing as the inlet is just opening a bit of movement of the crank makes either valve move up or down
adjust no 1 piston valves
now move on to the next piston to fire and adjust the valves that were rocking
follow that procedure until all the valves are adjusted
for example
on a 4 cylinder engine with a firing order of 1--3--4--2
bring up no 1 piston and adjust the valves when the valves on no 3 piston are rocking
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1 Answer

Enith carburetor diagram


Nobody has messed around with the ignition timing in any way?



If it has stood for a long time(i.e years..) the fuel may have degraded to the point that it\'s useless.



The carbs will smell of fuel, but are you sure that fuel is being pumped to them in sufficient quantity? Try disconnecting a fuel line, crank the engine a few revolutions to see if fuel is pumped out.



Try gravity feeding the carbs. Use a can of fuel connected to the carbs, held above the engine. Get somebody to crank the engine and see if it fires up. If the engine fires up, suspect the fuel pump.. or fuel lines.



An air leak can also cause non-starting. The usual cause is the inlet manifold gasket. Any air leaking through the gasket can cause your non-starting problem. Go back and check that no dirt has been picked up by the gasket before you fitted it/it hasn\'t been ripped. Check that the inlet manifold has been correctly tightened.



It doesn\'t sound as though you have much of a problem .. more of a \'niggle\'.

The link is for Zenith carburettors:



Zenith carburetor Google Search

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1 Answer

I have an 83 corolla with weber carburetor that sputters and has white smoke coming out of the carburetor before shutting off. Is this a timing issue?


1983, a very old car. and worse a carb. (will need cleaning kit)
E80 or E90 (83' is both as option)???????
what country, lots of variance by , COUNTRY!
is compression good. check that.
which engine,? (skip diesel)
1.3 L 2A I4
1.3 L 2E I4
1.5 L 3A I4
1.6 L 4A I4
1.8 L 1C diesel I4

e90 had
Gasoline: 1.3 L I4
1.5 L I4
1.6 L I4 after posting engine, and Weber model part number.
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my guess is that white smoke is from engine back fire to the carb.
this caused by 2 things , bad spark or cam timiing.
or a very lean carb.

check compression 150psi or more.
check spark timing,
check cam timing if compression is low.
check for Vacuum leaks at this will cause the engine to go lean
at idle. on all carbs.

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1 Answer

1983 civic 1.5L 5 speed manual. and i need to kn...


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