tr7triumph.com

Hi everyone, has anyone ever experienced this, when I go round a left hand bend (however slight) I get an engine misfire, I have tried many things to resolve this but still no real answer, i have tried a direct feed to the coil which improves it but doesn't cure it, any ideas any one? Its V8 conversion, new tank, pump, carbs rebuilt, new in line filters, new dizzy, coil, leads, as you can see I have tried loads of alternative solutions![?]

Sounds like fuel starvation. Were both floats OK and at the right level when the carbs were rebuilt, although I would have thought there would be enough fuel in the chamber anyway unless it was a very long bend?

Alan
Saab 9000 Stg 1
Saab 9000 2.3 FPT Auto
'81 TR7 DHC

Does it misfire if you're stationary but turning the steering to the left, or only whilst you're going along? If it does it when you're stationary maybe the steering mechanism is stagging on something.

Andy
1981 UK SPEC TR8
[img][IMG]http://i473.photobucket.com/albums/rr92/REPLIC8-2008/175-1.jpg[/img][/img] [img][IMG]http://i473.photobucket.com/albums/rr92/REPLIC8-2008/pics005.jpg[/img][/img]

Take a look at your motor mounts. If they are broken or weak, the engine could be moving excessively and causing the plug wires to chafe on something and ground out.
I had a car that had a broken motor mount and it caused the throttle linkage to bind and the engine wouldn't return to idle.

Aaron
1976 TR7 FHC (an ongoing project)

I had a similar thing on my 2liter while navigating a round about. I changed spark plugs and the problem is gone. It occurred because I would enter the round about in third and slow a bit and then put on throttle to come out the other side. So the combination of low RPM in 3rd with added throttle put a load on the a weak plug causing a misfire.


nick
'79 TR7

Does it do it if the fuel tank is full?

The 8 [fuel injected] does it on right handers, once the tank is below about 1/3Rd full.

I have been threatening to put a surge tank in the thing for years. Must be a pretty idle threat, as I'm always too busy doing something else, like going for a drive, with the tank more than half full of course.

Hasbeen

Hi,

You said rebuilt carbs as in plural. Does that mean twin SU's? Maybe something to do with the floats / needle valves?

Is your steering manual or pas? I don't know what difference that would make but somebody else might.

Adam






TR7 V8 DHC Jaguar Solent Blue. 9.35cr Range Rover V8, Holley 390cfm, JWR Dual Port, 214 Cam, Lumention, Tubular Manifolds, S/S Single Pipe Exh, 3.08 Rear, 200lb Spax & PolyBushes all round, Anti- Dive, Strut-Top Roller Bearings, Capri Vented Discs & Calipers, Braided Hoses, 4 Speed Rear Cylinders, Uprated Master Cylinder & Servo, AT 14" 5 Spokes or Maestro Turbo 15" Alloys, Cruise Lights, S/S Heater Pipes, Replacement Fuel Tank. No Door Stickers. Mine since July 1986, V8 from 1991 courtesy of S&S V8 conversion and big brake kits.