got out the old shop manual and here's what they say about the TTS.
(I've had my SL since 75 and just brought it back to life after sittin'
in my garage for nearly 8 years)
Above 35 C cooling Water Temp
1. connect voltmeter to connection of starting valve
2. Connect terminal W (cable colour pink) of TTS to ground (switch
3. Actuate starter. The voltmeter should then indicate approx. 10V.
(this test does not include the function of the TTS)
Below 35 C Cooling Water Temp
4. Connect voltmetwer to connectuion of starting valve
5. Actuate started. After a given period the voltmeter should indicate
10 V (depending on cooling water temperature)
The control period increases with decreasing temperature by approx. 1
sec. per 5 C.
+35 C = 0 sec
+20 C = 3 sec
The TTS is checked with an ohmmeter
Test values above 35 C
Connection W-ground = approx.100 ohm
Connection G-ground = approx. 60 ohm
ConnectionG-W = approx. 40 ohm
Test values below 35C
Connection G-ground = approx. 20 ohm
ConnectionW-ground = approx. 0 ohm
(contacts in switch closed)
Then here's my thought----pull the cold start valve off and see it's
shootin' out gas when you're starting the engine
OR---------e-mail me your real address, I'll make a photocopy of the
two pages with photo's and diagram, and send them to you, if you
Then I would suspect warm up regulator.
In this case, I would also check the spark plug wires too... check the
resistance... check the distributor cap and rotor... make sure they are
clean and no crack.
I forget that this car use point system for the ignition... you need to
double check the points that there is no oil.... everything is good there.
Hey tiger, when i unplug the cold start it still runs bad, pull off the
thermo time plug it dies does this say anything? I put new plugs,
condenser, rotor, cap, wires coil, and still have same problem.
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