• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

Electric choke problem.

OWD724

Senior Member
Offline
Hello, I have a strange problem with my XK120 FHC, that I cannot cure. It has a 3.4 engine, 9/1 Pistons, D type cams, 2" HD8 carburettors with UO needles, 123 Ignition system, set at 10 BTDC and 36 at 3,000. When car is hot it runs ok and gives 204bhp on Dyno. There is an electric choke with a manual switch rather than thermostatically connected. The problem I have is that starting from cold, with the choke on it will not run at 1,000 rpm unless I push the needle down with my finger, then the engine goes up to 1,000 rpm, I take my finger away, but the revs slowly reduces after a short time which lets the needle go up, so it then starts to flood its self then it stops. I have tried the nut on the top in several positions and it is currently about one full turn from the bottom. What I can tell you is that with the engine hot, if I put the choke on and flick the throttle open, it all seems to work correctly I.e. 700 rpm Idle without and about 1,000 - 1,200 with it on.
The main jets on the HD8 are set about 1/16 or a bit more down and I have set the jets for the highest rpm by going up and down then adjusting the volume screw.

I tried squirting carb cleaner around spindles and can't see any suck in leaks.

Any thoughts from the experts, appart from take it off and put a manual choke like an E type !!

thanks very much from England

regards
John
 
Similar threads
Thread starter Title Forum Replies Date
L Help with electric choke, 1960 AH BT7 Austin Healey 2
J Electric choke-MG Midget 1978 Single Weber Spridgets 4
Patrick67BJ8 Low-Profile Electric Puller Fans Austin Healey 51
Simmo General Tech Electric Cooling Fans. Are they a problem? Triumph 19
Rob Glasgow New Fangled Electric Overdrive Austin Healey 9
R Rewind electric motor Restoration & Tools 3
JPSmit Electric Midget Spridgets 1
M TR6 Electric Powered Rack & Pinion. Triumph 4
longbridgehealey Electric Fan vs. Texas Cooler Austin Healey 21
D Spitfire Electric fan Triumph 3
B TR4/4A Mechanical fuel pump vs electric Triumph 16
M TR6 Rimmer Bros. Electric Fan Conversion Triumph 0
M TR6 Dowel Pins, Pulley Adaptor, Revotec Electric Fan Kit Triumph 1
K TR2/3/3A An Electric TR3 ?? Triumph 3
Lin Electric Relay Placement Austin Healey 11
nevets interesting article about converting classic cars to electric power Austin Healey 7
FlyingCat Spitfire Electric Radiator Fan Triumph 10
M The electric E Jaguar 1
J TR4/4A Water temperature and electric fan in a TR4 Triumph 5
N Electric fan opinions???? Spridgets 2
P electric clutch Austin Healey 1
M TR2/3/3A Electric Fuel Pump Sound Triumph 7
Geo Hahn General Tech Emergency Electric Fuel Pump Triumph 29
B Electric fan Austin Healey 2
T Wanted WTB early TR 4 electric temperature gauge Triumph Classifieds 5
T General TR Request pictures of TR3B & TR4 electric temperature gauges Triumph 15
rjc157 TR6 Electric fan Triumph 5
J Spitfire Electric brake switch issue Triumph 5
johnrip Wedge tr7 electric fuel pump Triumph 2
exfed12825 General Tech Electric Power Steering With Fail Safe MG 0
Jer is it posible to fit an electric temperature gauge ? Spridgets 4
Got_All_4 General TR Electric fuel pump for in my possibles bag Triumph 12
Michael Oritt Electric tachometer connections--No Healey content Austin Healey 7
M TR2/3/3A Electric Fuel Pump Installation Triumph 12
J TR2/3/3A Radiator removal ?? electric fan vs original Triumph 7
T ?Changing BE to SU electric fuel pump Spridgets 8
S TR4/4A electric fan Triumph 6
Joe Reed MGB Removing stuck blade on factory electric cooling fan??? MG 7
KVH TR4/4A Electric Overdrive Lever Switch Triumph 3
mgedit TR2/3/3A Electric Powered TR3 Triumph 8
T TR2/3/3A Location for electric fuel pump? Triumph 21
R TR4/4A Thinking About an Electric fan Triumph 10
tinman58 TR2/3/3A Electric fuel pump questions. Triumph 5
rjc157 Electric radiator fan Austin Healey 11
G TR2/3/3A Electric Fan controllers Triumph 4
R TR6 TR6 Electric Fan Triumph 10
longbridgehealey Electric fan for Bugeye Spridgets 6
sqbsprite TR6 Electric cooling fan switch - where is best location to mount? Triumph 2
GTP1960 TR2/3/3A Electric fan wiring Triumph 11
P I need a non-working electric tachometer for parts Spridgets 0

Similar threads

Top