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dinko
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 Posted: Sun Sep 07, 2003 12:05 pm Post subject: another question bout my engine |
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| lately ive noticed that my alfa 33 92model's engine starts "shaking" when i keep a steady speed...if my foot's pressin the gas pedal and im keeping it steady, like lets say 60kms/h the engine starts acting very weirdly...it feels as not enough gas is being injected....but that doesnt seem right since the monute i press the pedal more or take my foot away from it it stops.....i know i cant explain it well enough becuase i myself don't know how to explain the "shaking"....but any help will b good |
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johnboy
16 Valve
Joined: 26 Jun 2003
Posts: 1061
Location: margate U.K
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| Posted: Sun Sep 07, 2003 1:08 pm Post subject: Re: another question bout my engine |
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Hi there,
sound's like it mite be one of your HT lead's breaking down. so it fire's on three not all four,that would make it shake abit, try replacing them that should help.hope that help's 
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WODA WE NEED? MORE POWER!!
Alfa gt jtdm blackline
1990 S2 16v veloce sleeping!
2002 ts gtv the wifes now
1997 seadoo gsx 800
1999 freestyle superjet |
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Eddie W
Alfa 33
Joined: 31 Jul 2003
Posts: 375
Location: new zealand
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| Posted: Mon Sep 08, 2003 11:09 pm Post subject: |
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Don`t know much about the injected engines but it sounds like fuel to me.On a carbed engine you would be looking at the idle jets and progression. HT leads you would expect to break down under higher throttle openings as the extra cylender filling and consequent comp. ratio has a capacitence effect on the spark.
Regards Eddie |
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dinko
Guest
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| Posted: Wed Sep 10, 2003 4:21 pm Post subject: |
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| i just came back form the repair shop and they told me its somethign in the electricity...the thing i dont understand is how can the electrical wires affect the engine...also i noticed that when i pop the hood and start my engine there's little sparks that come from these wires..only problem i dont know what those wires are...and now when i covered them and made sure they dont touch each other the engine stopped acting funny...can it be only because of those 2 little wires? |
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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Wed Sep 10, 2003 4:51 pm Post subject: |
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| dinko wrote: |
| i just came back form the repair shop and they told me its somethign in the electricity...the thing i dont understand is how can the electrical wires affect the engine...also i noticed that when i pop the hood and start my engine there's little sparks that come from these wires..only problem i dont know what those wires are...and now when i covered them and made sure they dont touch each other the engine stopped acting funny...can it be only because of those 2 little wires? |
If you loose electricity from the spark plug cables then the spark plugs dont have enough power to ignite the fuel and the engine is not working properly .Also seen sparks near the engine (and anywere in a car) is very dangerus.You should cheack every cable near were you saw these sparks and fix anything that needs fixing.
When i bought my 33 i had something going on like when you rev very high and it cuts off fuell or electricity.No repair shop could find what it was until one time it started to make it for a long time (since then it was for sec each time)so i started to move every cable i could find near the engine and it was a box that the spark plug cables start and go to the engine(not know how its told <<converter ?>>it takes 12V and turn it to 25000V for the spark plugs)and a simple taking off the incoming cable open the pins inside and put it back was enough to forget it for almost 2 years.
P.S. sorry for my english  |
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Admin
Site Admin
Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK
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| Posted: Wed Sep 10, 2003 5:49 pm Post subject: |
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| BILL wrote: |
| and it was a box that the spark plug cables start and go to the engine(not know how its told <<converter ?>>it takes 12V and turn it to 25000V for the spark plugs) |
That is the coil
Don't worry about your English. Better than my knowledge of any other language.
All the best
Keith |
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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Wed Sep 10, 2003 7:26 pm Post subject: |
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| Admin wrote: |
| BILL wrote: |
| and it was a box that the spark plug cables start and go to the engine(not know how its told <<converter ?>>it takes 12V and turn it to 25000V for the spark plugs) |
That is the coil
Don't worry about your English. Better than my knowledge of any other language.
All the best
Keith |
THNXS for the encouregment Keith 
As for the coil , there are two of them one for 1 3 cylinders and the other for the 2 4 cylinders.IF you change them with two others that have higher output can you gain any more HP (i.e. from a DELTA hf)? |
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gritsop
Green Cloverleaf
Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece
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| Posted: Wed Sep 10, 2003 7:47 pm Post subject: |
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Hi,
Bill a question for you:
What alfa do you own? Is it the 1.7 because mine has one coil (BOSCH electrical system) underneath the coolant reservoir.
I don't think that higher capacity coils can give more power - on the contrary you may fry your pistons...
Regards,
PS: Give my regards to 124PBE!!!
(For everyone else 124PBE is the campus of Hellenic Air Force located in Bill's city where i was 1.5 years ago ...)
_________________
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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BILL
Alfa Sprint
Joined: 04 May 2003
Posts: 154
Location: TRIPOLIS GREECE
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| Posted: Wed Sep 10, 2003 7:59 pm Post subject: |
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| gritsop wrote: |
Hi,
Bill a question for you:
What alfa do you own? Is it the 1.7 because mine has one coil (BOSCH electrical system) underneath the coolant reservoir.
I don't think that higher capacity coils can give more power - on the contrary you may fry your pistons...
Regards,
PS: Give my regards to 124PBE!!!
(For everyone else 124PBE is the campus of Hellenic Air Force located in Bill's city where i was 1.5 years ago ...) |
Hi, i own a 1992 cat 33 1.4 IE with 190.000 klm on the clocks
and it has two coils wich are placed under the butterfly near the clutch cylinder .Ow and the ecu is a MAGNETI MARRELI IAW something and all the sensors are JAEGER not Bosch who are much cheaper(Bosch) and easy to find.Even o2 sensor who i change a week ago had to be especialy for IAW ecu or it wouldend work properly(i quote my mechanic)
The higher capacity coil was just a thought
PS I did my time too there almost 7 years ago, and guess what 
i was a driver  |
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gritsop
Green Cloverleaf
Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece
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| Posted: Wed Sep 10, 2003 11:12 pm Post subject: |
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Hi Bill,
My Alfa is a 5/1991 model currently with 74000 kms.
It is first hand car and it used to be my mothers - now I am the one who operates it and of cource makes every service and maintenance!
As i wrote to you it is a bosch elec. system with one coil , the air flow sensor is located next to the air filter, the injectors are all blue- i wonder how your engine looks like? what is there in the place of the distributor? is this area empty?
Can you post a photo of the engine as i am curious about the different electrical system and the setup as a whole. I ll try for mine.tks
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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Admin
Site Admin
Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK
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| Posted: Thu Sep 11, 2003 6:35 pm Post subject: |
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Hi
The late 1.5 and 1.7 8V cars used coil packs, similar to the setup on your car. Basically this sat near the throttle body and had the 4 spark plug leads going into it. It is in effect 2 coils in one unit. Each coil controlled a pair of cylinders, generating sparks whenever one was required for either of that pair of cylinders. This means that each cylinder is actually receiving twice as many sparks as are required (it is known as a wasted spark system and is quite common on motorcycles).
The 16V and the older 8V cars used a conventional system with a single coil with a lead to a distributor which sent the current to the appropriate cylinder.
You will not gain any extra power from a better spark. As long as the spark happens reliably at the right moment and strong enough to ignite the petrol / air mix then not much can be gained (of course, with serious tuning of the engine, such as a much higher compression, it is possible to land up in a situation where the coil cannot generate a spark reliably).
All the best
Keith |
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