• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

Wedge TR7- Spitting & Caughing at quick acceleration ??

Share this page

KLUTZ

KLUTZ

Luke Skywalker
Country flag
Offline
I have had a few small problems the last week with my 78 TR7. Firstly, it is taking a long time of turning over before it starts. It is like the gas isn't there for it on startup. Also, When I accelerate quickly, the car sputters, jerks, then finally finds a spot where it is happy, and runs great over 50 KPH. When I start slowly from a stop, it is fine. Highway driving has been no problem at all either.
Thanks
Paul /ubbthreads/images/graemlins/canpatriot.GIF
 
Re: TR7- Spitting & Caughing at quick acceleration

[ QUOTE ]
are these the manual choke Zenith/Stromberg carbs? if not...

[/ QUOTE ]

If yes, perhaps a leak is emptying the fuel bowls requiring you to crank until they are refilled.

As for sputtering acceleration: If Z/S check your dashpot oil.
 
Do you ever get the smell of unburnt gas? If so it could be ignition related. My first thought though is the fuel pump (if fuel related). Good place to start would b to pull the plugs and have a look at their colour and see if they're still good.
 
Re: TR7- Spitting & Caughing at quick acceleration

I checked the dashpots, and they were low. I filled them a couple weeks ago too ??? The car runs much better now. I only noticed the problem one time.
Where could the oil be going? /ubbthreads/images/graemlins/thumbsup.gif
 
Paul,

Are there little vent holes on your dashpot tops? If so cehck the top of your carbs tomarrow after driving it some and see if it is squirting some oil up out the top. Otherwise you may have a small leak and the oil is just being sucked into the intake.
 
Re: TR7- Spitting & Caughing at quick acceleration

There's an O-ring around the needle adjusting screw in the bottom of the piston. If that isn't making a good seal, you'll lose oil. It's kind of a pain to replace, but not a hard job.
 
Re: TR7- Spitting & Caughing at quick acceleration

[ QUOTE ]
I checked the dashpots, and they were low. I filled them a couple weeks ago too ??? The car runs much better now. I only noticed the problem one time.
Where could the oil be going?

[/ QUOTE ]
[ QUOTE ]
Are there little vent holes on your dashpot tops? If so cehck the top of your carbs tomarrow after driving it some and see if it is squirting some oil up out the top. Otherwise you may have a small leak and the oil is just being sucked into the intake.


[/ QUOTE ]
[ QUOTE ]
There's an O-ring around the needle adjusting screw in the bottom of the piston. If that isn't making a good seal, you'll lose oil. It's kind of a pain to replace, but not a hard job.


[/ QUOTE ]

Boy an I glad I have fuel injection /ubbthreads/images/graemlins/wink.gif
 
Re: TR7- Spitting & Caughing at quick acceleration

[qoute] Boy an I glad I have fuel injection /ubbthreads/images/graemlins/wink.gif

[/ QUOTE ]

When it comes time to troubleshoot a F/I problem you'll wish you had a "Check Engine" light. /ubbthreads/images/graemlins/crazy.gif
 
Re: TR7- Spitting & Caughing at quick acceleration

[ QUOTE ]
qoute] Boy an I glad I have fuel injection


--------------------------------------------------------------------------------



When it comes time to troubleshoot a F/I problem you'll wish you had a "Check Engine" light.

[/ QUOTE ]

Oh, but I do...oh wait, that's just for the lamda sensor. Actually, so far I've managed to troubleshoot a couple of problems (bad fuel supply and bad cold start injector) using the Bentley manual. Once you dissect the wiring diagram and how it's supposed to work, it's pretty straight forward. /ubbthreads/images/graemlins/driving.gif
 
Back
Top