help help help please, 88 stevens turbo problem
Discussion
hi all,
well my car has gone into the garage to have the carbs balanced, they have done this and she is ticking over fine, but the problem is when you go to pull away, the car will then just die. Any help on this please.
many thanks all
hope to see some of you at donnington next month
well my car has gone into the garage to have the carbs balanced, they have done this and she is ticking over fine, but the problem is when you go to pull away, the car will then just die. Any help on this please.
many thanks all
hope to see some of you at donnington next month
Hi,
It sounds as if there's a vacuum leak somewhere in the system. Particularly suspect would be the vacuum lines going into the carb itself, trace the lines to insure they're properly connectd on the other end as well.
Another possibility is the carb balance tubes. These would have been disturbed and are notorious for leaking, both at their hose junction with the diffuser as well as at the banjo fittings.
Finally, a mis-set float height could also cause the symptoms your describe (set too high and therefore won't close the needle causing momentary flooding - s/b 14-14.5mm). Did they reset the floats in the tune-up? Were the gaskets changed? The needle valves?
Happy Motoring! ...Jim'85TE
It sounds as if there's a vacuum leak somewhere in the system. Particularly suspect would be the vacuum lines going into the carb itself, trace the lines to insure they're properly connectd on the other end as well.
Another possibility is the carb balance tubes. These would have been disturbed and are notorious for leaking, both at their hose junction with the diffuser as well as at the banjo fittings.
Finally, a mis-set float height could also cause the symptoms your describe (set too high and therefore won't close the needle causing momentary flooding - s/b 14-14.5mm). Did they reset the floats in the tune-up? Were the gaskets changed? The needle valves?
Happy Motoring! ...Jim'85TE
hi Jim,
the full story is that i had a new engine put in the car i rebuilt the carbs myself with all new gaskets etc...... although i was not sure about float heights at the time. But once fired up all was fine, but as i had done the carbs myself i thought i would put them in to get properly balanced. So off i took the car to a garage that was recomended to me after a couple of days the car was ready and all was fine except when you went to put a little too much pressure on the gas she would miss a little, the guy at the garage had forwarned me of this. I had gone out and done 600 mile over a couple of weeks with no problem as i did not want to go too heavy on the new engine. We arranged for the car to go back into the garage as he said it maybe the float heights that need ajusting. So again off it went but when i got the car back this time this is when this problem has now arrisen.
thanks
the full story is that i had a new engine put in the car i rebuilt the carbs myself with all new gaskets etc...... although i was not sure about float heights at the time. But once fired up all was fine, but as i had done the carbs myself i thought i would put them in to get properly balanced. So off i took the car to a garage that was recomended to me after a couple of days the car was ready and all was fine except when you went to put a little too much pressure on the gas she would miss a little, the guy at the garage had forwarned me of this. I had gone out and done 600 mile over a couple of weeks with no problem as i did not want to go too heavy on the new engine. We arranged for the car to go back into the garage as he said it maybe the float heights that need ajusting. So again off it went but when i got the car back this time this is when this problem has now arrisen.
thanks
I had a similar problem to this a couple of weeks ago whereby when i tried to accelerate the engine just died and I was convinced it was a fuel problem. May be a blockage in the carbs or dirt in the fuel filter/ fuel pump. I took it to my Lotus mechanic and he sorted it out for me within the day. It turned out to need a new rotor arm and distributor cap.
Pauli,
What float height did you use? 14.5-15.0 mm is correct. A smaller number would cause the engine to run RICHER overall... a larger number, leaner.
When you set the floats, hold the carb cover with the gasket face verticle, float hinge at the top and the floats hanging down. Gently tilt the cover to cause the float to swing away from and toward the inlet valve.
If the cover is held with the gasket face horizontal, the resultant float height will be way off.
The guy at the garage forwarned you of the problem but let the car go that way?? That shouldn't have happened. If he knew there was a problem, he should have fixed it before releasing it to you.
Did the shop do anything other than balance the carbs? Did they mess with the jetting at all?
The pressurization tubes shouldn't cause a problem until the turbo starts to build boost. If the engine dies just as you take off, I wouldn't expect the pressure tubes to be a main contributor.
When does the problem occur? Just off idle, or when you put your foot in it going up through the gears? Is the waste gate stock, or have you upped the boost?
Specifically what has the mechanic done so far? Do you have any second choices for a mechanic? This guy has let it go out the door with a problem on two occassions, so he's obviously not taking it upon himself to resolve the problem. A good mechanic with his hands on the car is in a much better position to fix it than we are, guessing from a distance. If he can't or won't, you need a new mechanic.
Good luck,
Tim Engel
Lotus Owners Oftha North
>> Edited by Esprit2 on Monday 7th March 17:31
What float height did you use? 14.5-15.0 mm is correct. A smaller number would cause the engine to run RICHER overall... a larger number, leaner.
When you set the floats, hold the carb cover with the gasket face verticle, float hinge at the top and the floats hanging down. Gently tilt the cover to cause the float to swing away from and toward the inlet valve.
If the cover is held with the gasket face horizontal, the resultant float height will be way off.
The guy at the garage forwarned you of the problem but let the car go that way?? That shouldn't have happened. If he knew there was a problem, he should have fixed it before releasing it to you.
Did the shop do anything other than balance the carbs? Did they mess with the jetting at all?
The pressurization tubes shouldn't cause a problem until the turbo starts to build boost. If the engine dies just as you take off, I wouldn't expect the pressure tubes to be a main contributor.
When does the problem occur? Just off idle, or when you put your foot in it going up through the gears? Is the waste gate stock, or have you upped the boost?
Specifically what has the mechanic done so far? Do you have any second choices for a mechanic? This guy has let it go out the door with a problem on two occassions, so he's obviously not taking it upon himself to resolve the problem. A good mechanic with his hands on the car is in a much better position to fix it than we are, guessing from a distance. If he can't or won't, you need a new mechanic.
Good luck,
Tim Engel
Lotus Owners Oftha North
>> Edited by Esprit2 on Monday 7th March 17:31
hi guys,
well i have taken her to another garage and they seem to have done a good job, they ajusted the float heights and she now ticks over and drives. The only thing that is happening now is when you go to put ya fooot down she holds back a bit then the boost picks up. The guy seems to think that it could be the fuel pump regulator? as he seems to think there may be too much fuel going into the car as when the plugs come out they are damp with fuel.
Any comments on this please
thanks
Pauli
well i have taken her to another garage and they seem to have done a good job, they ajusted the float heights and she now ticks over and drives. The only thing that is happening now is when you go to put ya fooot down she holds back a bit then the boost picks up. The guy seems to think that it could be the fuel pump regulator? as he seems to think there may be too much fuel going into the car as when the plugs come out they are damp with fuel.
Any comments on this please
thanks
Pauli
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