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paddy granger
Alfa Sprint
Joined: 12 Aug 2003
Posts: 248
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 Posted: Sat Oct 02, 2004 12:50 pm Post subject: Car running rough when cold |
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Is it normal for a 33 to run very rough for about 3 mins before it warms up a bit? With rough, I mean that I get the sensation that the engine is extremely tight, and that the pistons are held in place by pressure, almost as if the valves are sticking. It will cruise with no probs at 40 km/h, but will stutter a bit, and then when downshifting with a throttle blip a back fire normally occurs. On acceleration from stand still, I even had two backfires the other day.
Once the engine has been running for about 3 mins it loosens up and drives perfectly. Engine oil is new, and have had the same problem for 4 years - as long as we have had the car.
Maybe a fuel supply problem?
Paddy |
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gritsop
Green Cloverleaf
Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece
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| Posted: Sat Oct 02, 2004 1:57 pm Post subject: |
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Hi,
What about the extra air solenoid valve? It should give more air to the engine in order to make the mixture richer during the warm-up process.
It would be a beginning to trace the problem.
Regards,
_________________
Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive
http://www.alfa-restoration.co.uk
Parts Shop: www.alfa-restoration.co.uk/shop |
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ZeNiTh-PbArM
Alfa 33
Joined: 14 Mar 2003
Posts: 388
Location: Paris, France
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| Posted: Sat Oct 02, 2004 5:59 pm Post subject: re : rough running |
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hi,
if your car is a 1.3 ie alfa 33 fitted with marelli fuel sustem, it is perfectly normal since the injection fires in asynchronous mode during 120 seconds when starting the car from cold, then switches to synchronous mode and the car runs well after.
perhaps are some other fuel systems functionning the same way.
regards,
zp |
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paddy granger
Alfa Sprint
Joined: 12 Aug 2003
Posts: 248
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| Posted: Sat Oct 02, 2004 6:34 pm Post subject: Re: re : rough running |
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| ZeNiTh-PbArM wrote: |
hi,
if your car is a 1.3 ie alfa 33 fitted with marelli fuel sustem, it is perfectly normal since the injection fires in asynchronous mode during 120 seconds when starting the car from cold, then switches to synchronous mode and the car runs well after.
perhaps are some other fuel systems functionning the same way.
regards,
zp |
Merci! That answers the question - it is more like 2 minutes, and it is a 1351 cc IEL with Marelli.
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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Sat Oct 02, 2004 10:11 pm Post subject: Re: re : rough running |
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| paddy granger wrote: |
| ZeNiTh-PbArM wrote: |
hi,
if your car is a 1.3 ie alfa 33 fitted with marelli fuel sustem, it is perfectly normal since the injection fires in asynchronous mode during 120 seconds when starting the car from cold, then switches to synchronous mode and the car runs well after.
perhaps are some other fuel systems functionning the same way.
regards,
zp |
Merci! That answers the question - it is more like 2 minutes, and it is a 1351 cc IEL with Marelli.
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Same happens to my 33.When cold i cant get over 4000rpm ,like something is halting the engine.But after 2 or 3 minutes it works fine.In my 33 when starting the engine you must wait for the red(temp warning)light and the orange (low fuel)light to turn off before start moving.I follow the procedure when the engine is cold but when hot i sometimes dont.Does your 33 have the same system ? |
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paddy granger
Alfa Sprint
Joined: 12 Aug 2003
Posts: 248
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| Posted: Sun Oct 03, 2004 12:44 am Post subject: |
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| Yes, I think it does - I always wait for the lights to turn off before starting the engine. I suppose it is best to allow the engine to warm up a bit on idle before driving off. Obvioussly one should always wait until the engine is warm before putting the foot down. |
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Sergio
Alfa Sprint
Joined: 13 Mar 2003
Posts: 150
Location: Portugal
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| Posted: Sun Oct 03, 2004 6:48 pm Post subject: |
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BTW have you checked your HT leads? I had a 1.3s (two double webbers) and she disn't like the first minutes either... replaced the HT leads and was fine...
Though this might not be your case  ..... just giving my personal experience
all the best
Sérgio
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Driving a 33 1.7 16v QV & Lancia Musa |
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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Sun Oct 03, 2004 8:27 pm Post subject: |
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| paddy granger wrote: |
| Yes, I think it does - I always wait for the lights to turn off before starting the engine. I suppose it is best to allow the engine to warm up a bit on idle before driving off. Obvioussly one should always wait until the engine is warm before putting the foot down. |
I start the engine -wait for the lights to turn off-then drive  .Ideal would be to have an oil temp gauge  ,then we would know when the engine is ready to run all the way to the red rpms. |
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