Modano
18th October 2007, 03:56 AM
Hi all,
I've got an amazing 1300 double choke carb Beta Coupé since 2 years now.
I love it :)
Anyway, since the beginning I had it, I've a very very specific problems, which seems to be close to problems some people had here !!
Let's sum up things.
When running at low RPMs (< 4000), everything is okay, although the car is somewhat far from being performant. Anyway I guess the one-ton weight slows down performance :) Anyway this is not a problem.
Everything is Okay, although the motor is "coughing", and is unstable in terms of revs, when it comes to very slow revs (<1500). I have to play with the clutch to avoid aircraft-like vibrations.
But the main and real problem happens when the engine is somewhat highly in use.
What I call highly in use is :
- 4th or 5th gear only : Revs > 4000 rpm. (very common on highway)
- High rev while climbing > 4000 rpm whatever gear is chosen
- Very high rev at 3rd gear : > 5500 rpm for more than 10 seconds.
What happens is that the motor coughs, the revs drops down,and I have to pass down one gear, and calm on the throttle, (or do a good acceleration while clutch on, therefore without the engine connected), to get a normal behaviour.
On highways I cannot exceed 100 kms/h :( If I go too high on revs, problems happen.
What happened very recently is, on a highway exit, I got always the same behaviour, but I insisted a little bit and then...boum, the motor purely stalled.I got very afraid when I saw the Oil pressure light on, but Jesus I was so happy when I saw it was just a Stall. Anyway, a bit dangerous..
It took me 3 or 4 starting tries to get it back running.... When this happened, I knew this was related to fuel arrival, and not to any ignition problems (got an electronic ignition).
In parallel, since months I have another problem :
When the car does not run for 4 days, it takes aeons to start it. The fuel circuit seems to be fully empty, and I have to try 5-6-7 starts to get fuel arriving, and then the car runs very fine and starts at the first glance.
I was told there may be a leak somewhere. I cannot smell petrol anywhere in the motor compartiment. The mechanical fuel pump has been changed 1 year ago...
And when I start, in the morning, the car...I hear a liquid noise from rear to front, on the right side, near the door....exactly where the fuel circuit is located !!! May this be my fuel ?
So I heard many theories :
- leak inside the carb, which goes directly in Admission pipe ?...
- Fuel tank rusty-dirty-ugly ? My fuel filter doesnt seem to show big rust blocks at all... I tried to put some fuel in a bottle directly after the pump, it was crystal clear.
- Not a problem related to Fuel system ?
- Automatic Choke ? (I'll get rid of it very soon I guess. I suspect it to grow my comsuption by 1 liter per 100 kms...)
Note that my fuel comsuption is very high in Town, and the exhaust badly smells fuel.
Thanks a lot :)
I've got an amazing 1300 double choke carb Beta Coupé since 2 years now.
I love it :)
Anyway, since the beginning I had it, I've a very very specific problems, which seems to be close to problems some people had here !!
Let's sum up things.
When running at low RPMs (< 4000), everything is okay, although the car is somewhat far from being performant. Anyway I guess the one-ton weight slows down performance :) Anyway this is not a problem.
Everything is Okay, although the motor is "coughing", and is unstable in terms of revs, when it comes to very slow revs (<1500). I have to play with the clutch to avoid aircraft-like vibrations.
But the main and real problem happens when the engine is somewhat highly in use.
What I call highly in use is :
- 4th or 5th gear only : Revs > 4000 rpm. (very common on highway)
- High rev while climbing > 4000 rpm whatever gear is chosen
- Very high rev at 3rd gear : > 5500 rpm for more than 10 seconds.
What happens is that the motor coughs, the revs drops down,and I have to pass down one gear, and calm on the throttle, (or do a good acceleration while clutch on, therefore without the engine connected), to get a normal behaviour.
On highways I cannot exceed 100 kms/h :( If I go too high on revs, problems happen.
What happened very recently is, on a highway exit, I got always the same behaviour, but I insisted a little bit and then...boum, the motor purely stalled.I got very afraid when I saw the Oil pressure light on, but Jesus I was so happy when I saw it was just a Stall. Anyway, a bit dangerous..
It took me 3 or 4 starting tries to get it back running.... When this happened, I knew this was related to fuel arrival, and not to any ignition problems (got an electronic ignition).
In parallel, since months I have another problem :
When the car does not run for 4 days, it takes aeons to start it. The fuel circuit seems to be fully empty, and I have to try 5-6-7 starts to get fuel arriving, and then the car runs very fine and starts at the first glance.
I was told there may be a leak somewhere. I cannot smell petrol anywhere in the motor compartiment. The mechanical fuel pump has been changed 1 year ago...
And when I start, in the morning, the car...I hear a liquid noise from rear to front, on the right side, near the door....exactly where the fuel circuit is located !!! May this be my fuel ?
So I heard many theories :
- leak inside the carb, which goes directly in Admission pipe ?...
- Fuel tank rusty-dirty-ugly ? My fuel filter doesnt seem to show big rust blocks at all... I tried to put some fuel in a bottle directly after the pump, it was crystal clear.
- Not a problem related to Fuel system ?
- Automatic Choke ? (I'll get rid of it very soon I guess. I suspect it to grow my comsuption by 1 liter per 100 kms...)
Note that my fuel comsuption is very high in Town, and the exhaust badly smells fuel.
Thanks a lot :)