Gaz
Monday 31st October 2005 - 5:22pm
04/08/2010I've decided to tidy up this post as it's a bit cluttered. In summary, check the part number on your GT's distributor. It should be either:
030 905 205 P Original Part
030 905 205 T Replacement Part (Superceeds P) Bosch Part Number 0 986 237 668
030 905 205 AB Mk4 MPI distributorAll three of these distributors are proven to work properly with the digifant ECU GTs have.
Distributors known to not work properly:
030 905 205 H Mk3 Single point injection Distributor
030 905 205 AA MK3/4 Single point injection Distributor
030 905 205 AC 2.0 8v MK3 Golf DistributorAll of these are for non-Digifant applications and will send incorrect signals to the ECU, causing improper ignition timing and reduced performance.
Image of an SPI and MPI distributor. SPI is on the left, MPI is on the right. Note the difference in the size of the gaps in the trigger wheelQUOTE
Original post - 31/10/05Turns out mine didnt.
Its had an SPI one ever since I put it together. Good job i found that scrapped GT. 8) The dizzy it had on came off Steve-O's GT's original engine, which had been reecently replaced with a "new" one (read - from scrap yard)
Now some people say that this dizzy works ok on a GT, but mine had never idled right, and when I looked at the advance with a timing light with the old dizzy on a few weeks ago, the area it was firing at idle in "normal" mode was way after TDC, but in service mode the timing was perfect. I put this down to my car being a bodge. (
) But putting this dizzy on from the scrapyard gt and it was perfect. firing before TDC like it should. 8)
I put the part number in etka (030 905 205 P) and it said part number could not be determined. The GT/G40 one is supposed to end in T. Presumably this is like the GT inlet manifold part number that changed later on to a G from a B (summat like that anyway) can someone confirm?
Thank you please.
Andy
Monday 31st October 2005 - 5:47pm
030 905 205 P is the correct one, glad you've got it running even better! Will be interesting to see what power it makes now, and whether it can still spit flames.
Personal experience agrees with your findings too. Barningfield's GT never ran right on a CL dizzy and the GT setups I ran in my car didn't either. Hardly surprising really, as the hall sender trigger wheel spacings are different - so it'll give a different output waveform to the ECU.
Gaz
Monday 31st October 2005 - 5:49pm
Cheers Andy. Gonna go for a run for a bit to see what its like. 8)
Del
Monday 31st October 2005 - 5:50pm
So, hold on hold on.
What are the findings here? Gaz - you've had an SPI CL dizzy in your GT and it was poo. But you replaced it with a correct MPI GT dizzy (number 030 905 205 P) and it's now working smoothly?
We replaced ours right at the beginning. I'm sure it was a brand new GT one we put it... but maybe it wasn't? Is there any way to determine which is which? 'Cause I've never had good idling and almost EVERYTHING has been replaced - not directly related to the problem, but items that would cure it.
Gaz
Monday 31st October 2005 - 5:52pm
yeah the dizzy itself has a part number stamped on the bottom. Oh and yes - your analysis of the situation is correct.
Del
Monday 31st October 2005 - 5:54pm
Sweet buns. Gonna go have a look.
Del
Monday 31st October 2005 - 6:06pm
Ok, I just snapped a pic of my dizzy. Looks like my part number reads "030 905 205 AA"
What does this conclude? I have the wrong dizzy? For which model is this dizzy - SPI CL?
Gaz
Monday 31st October 2005 - 6:08pm
Doh, looks like youve got the wrong one too.
And yeah same one as I had (SPI 1.0/1.3)
Del
Monday 31st October 2005 - 6:10pm
So I may have found the source of my shitty idling and response!
Can you buy the GT dizzy new still?
Nick_S
Monday 31st October 2005 - 6:13pm
Thats an SPI dizzy, was the same as that on Doughy's old GT. It probably will be common place due to age of cars. A lot easier for someone to get hold of an SPI one from a scrappy than a GT one. The G40 engine conversion i got hold of had a MK4 polo dizzy on it
Gaz
Monday 31st October 2005 - 6:13pm
only from vag, or possibly a bosch agent.
Nick_S
Monday 31st October 2005 - 6:15pm
You can get them from Bosche, the part number above the VAG one is the Bosche part number. GT/G40 dizzy part numbers end in P or T.
Nick101
Monday 31st October 2005 - 6:16pm
Gonna go check mine now...
How much are they new?
Gaz
Monday 31st October 2005 - 6:21pm
they're around £100 I think.
Del
Monday 31st October 2005 - 6:22pm
Can someone please confirm VAG and Bosche part numbers for the GT dizzy so I can go about getting a new one if it's not too heavy on the wallet.
Nick_S
Monday 31st October 2005 - 6:23pm
QUOTE (Gaz)
they're around £100 I think. :shock:
At least
Lambda probes are getting on for £50
Nick101
Monday 31st October 2005 - 6:24pm
pff not cheap then. I'm buying a new Lambda probe this week, £45! just checked my dizzy, its the right one (thank god). I bought it off DK recently, tested etc, so it should be ok! it seems fine. Is there any signs their on their way out, because my old one just died, and i dont want it to happen to this one.
Gaz
Monday 31st October 2005 - 6:25pm
i can get the number from mine tomorow. And yeah they just stop working when they go wrong.
Metz
Monday 31st October 2005 - 6:33pm
I better check mine tommorow now..bought the engine off a right dodgy looking guy
Nick_S
Monday 31st October 2005 - 6:35pm
QUOTE (Gaz)
I put the part number in etka (030 905 205 P) and it said part number could not be determined. The GT/G40 one is supposed to end in T.
The original VAG part number is 030 905 205 P, but this has been superseeded so if you get a replacement now from VAG it will be 030 905 205 T
Del
Monday 31st October 2005 - 6:38pm
Ok nice.
Confirmed part number for VAG then:
030 905 205 P (original)
030 905 205 T (new number)
optima21
Monday 31st October 2005 - 6:42pm
mine runs fine with a 1L dizzy, and when I got my car originally it turns out that it had a repelacement dizzy less than a year old without any markings but thats also a 1L dizzy.
at the RR day last year my GT had 88 bhp and yoof's had 90bhp this year, and I was running a fairly similar setup e.g. golf AFM and 4 branch exhaust, but I did have one of Dans chips in it.
Nick_S
Monday 31st October 2005 - 6:43pm
Just looking at ETKA and there is only two dizzy versions for the MK4 polo, so one of these may be better than an SPI mk3 one as a standby.
What mk4 engine is the AEV?
Gaz
Monday 31st October 2005 - 6:57pm
I think AEV is 1.05 SPI
Gaz
Monday 31st October 2005 - 6:58pm
QUOTE (Nick_S)
QUOTE (Gaz)
I put the part number in etka (030 905 205 P) and it said part number could not be determined. The GT/G40 one is supposed to end in T.
The original VAG part number is 030 905 205 P, but this has been superseeded so if you get a replacement now from VAG it will be 030 905 205 T
yeah thats pretty much what i said in the next sentence, (but badly worded.)
Gaz
Monday 31st October 2005 - 7:00pm
QUOTE (metz)
I better check mine tommorow now..bought the engine off a right dodgy looking guy
Id be suprised if it was the wrong one, that gt engine went really well. (And still does I'm sure)
Yoof
Monday 31st October 2005 - 7:03pm
QUOTE
at the RR day last year my GT had 88 bhp and yoof's had 90bhp this year, and I was running a fairly similar setup e.g. golf AFM and 4 branch exhaust, but I did have one of Dans chips in it.
hmm, a year apart tho dom, you can't compare power figures between different days let alone years...
i always think its best to have the correct parts on your car, i fitted the spi dizzy at the weekend and timed it up properly to see if mine was fooked (under gas) but it didn't like it one bit. gt dizzy is far better IMO.
optima21
Monday 31st October 2005 - 7:11pm
QUOTE (Young_Un)
QUOTE
at the RR day last year my GT had 88 bhp and yoof's had 90bhp this year, and I was running a fairly similar setup e.g. golf AFM and 4 branch exhaust, but I did have one of Dans chips in it.
hmm, a year apart tho dom, you can't compare power figures between different days let alone years...
i always think its best to have the correct parts on your car, i fitted the spi dizzy at the weekend and timed it up properly to see if mine was fooked (under gas) but it didn't like it one bit. gt dizzy is far better IMO.
yeah and hence why I said similar, as there are so many variables even on the same spec cars on the same day, and even on the same day you can get quite a variation due to temperhature and atmosheric pressure.
Steve_O
Monday 31st October 2005 - 7:33pm
Hmm - interesting!!
Mine runs beautifully since I bought a new alternator - but I will check anyway.
Unless you happen to know for a fact Gaz??
hardhitter01uk
Monday 31st October 2005 - 8:27pm
This was also the cause of poor running and bad idling issues on my black GT. I knew it had a new dizzy on shortly before I bought it, and I assumed it was the correct part (as you do
)
To cut a long story short, I spend ages scraching my head think what it could be, double and triple checking stuff like ISV and vacuum pipes and it turned out to be the wrong dizzy.
So I got the correct dizzy on, set it all up and it worked a treat.
Gaz
Monday 31st October 2005 - 8:51pm
QUOTE (Steve_O)
Hmm - interesting!!
Mine runs beautifully since I bought a new alternator - but I will check anyway.
Unless you happen to know for a fact Gaz?? :?
Nope, never checked. This is the first time I've EVER checked I've got the right dizzy. I wish I had done it sooner. Although having said that I've only just aquired a GT dizzy for it. So in a way its worked out alright.
Alex
Monday 31st October 2005 - 8:56pm
Just been out to check mine, and it's the right one.
Did wonder if that was the source of my running problems, but it isn't.
That's a good thing, because it's not cheap to replace, I should know, I replaced the dizzy on my old engine.
Del
Monday 31st October 2005 - 8:58pm
Been informed that it's £139 or something to buy a new one. I'm gonna be phoning up Volks Center tomorrow to check.
Might be able to get a hold of one soon anyway - along with more of a GT
for about the same price as a new dizzy
Steve S
Monday 31st October 2005 - 10:17pm
My Gs one ends in a P
Chris_J
Monday 31st October 2005 - 10:18pm
030 905 205 P
So looks like I have the correct dizzy then. I have a couple spare, but they all need rebuilding.
Are the hall senders the same? As the two I have spare, both hall senders are buggered.
Nick_S
Monday 31st October 2005 - 10:31pm
I got a spare with a buggered hall sender too
The hall sender is different and so is the internal brass coloured wheel with gaps in it.
PeteG40
Monday 31st October 2005 - 10:48pm
hall sender same for all mk3 i think
Metz
Tuesday 1st November 2005 - 11:12am
QUOTE (Gaz)
QUOTE (metz)
I better check mine tommorow now..bought the engine off a right dodgy looking guy
Id be suprised if it was the wrong one, that gt engine went really well. (And still does I'm sure)
Haha i was just waiting for a reply lol, Yea it pulls like a train.
Del
Tuesday 1st November 2005 - 12:12pm
Well, I phoned my Volks Center Aberdeen (specialised independant VW dealer) and they can't get a hold of that item - wonderful. But they gave me a number for a Bosche dealer. They cross refereced VAG number 030 905 205 T to the Bosche exchange number 0986 237 668 and found the GT dizzy.
The bad bit - none in the UK for Bosche, have to get one in from Germany. Price = £165.38 + VAT
AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
I haven't phoned my main VW garage yet, but I'll swing by them later today see what they say - I'm a little frightened to be honest
I'm also waiting on a reply from Martyn @ VAG Parts so we'll see what he comes back with.
optima21
Tuesday 1st November 2005 - 12:22pm
at those prices I'm glad that I've got a couple of spare GT dizzys
Del
Tuesday 1st November 2005 - 12:27pm
You have a couple spare? How much will you want for one?
optima21
Tuesday 1st November 2005 - 12:35pm
my stash of parts arnt for sale, because if I need them in future, when I want them I'll have to spend ages trying to locate them or paying extortionate amounts of money, so I've bought things that I may need when they've been cheap.
If you plan on keeping cars for a while and have the space it makes sense to do it.
Jackass
Tuesday 1st November 2005 - 1:07pm
QUOTE (PeteG40)
hall sender same for all mk3 i think
I think you are right. I believe you can get a hall sender replacement kit from VAG too.
Mark
Tuesday 1st November 2005 - 1:43pm
hmmmmm
i only recently bought a new distibutor for my car from VAG
according to the invocie the part no is 030905237X
doesn't seem to be the same at all
Andy
Tuesday 1st November 2005 - 6:03pm
@Yolmol: X denotes an exchange part, and you've got the correct one.
By the way guys, EuroCarPrats can get Bosch stuff - which I found to be cheaper than my local Bosch dealer for fuel pumps at least. And like Del says, the Bosch part number is: 0 986 237 668.
Nick101
Tuesday 1st November 2005 - 6:17pm
How much can you get a fuel pump for then? Mine is making funny noises.
Andy
Tuesday 1st November 2005 - 6:28pm
I got a Bosch inline pump, VDO lift pump and the filter and strainer for about £150 from ECP.
Mark
Tuesday 1st November 2005 - 7:01pm
QUOTE (amstrange1)
@Yolmol: X denotes an exchange part, and you've got the correct one. :)
hehehe cheers buddy, went out and checked earliar, just to make sure after i posted that, and yes it ends in 205T
86C
Wednesday 2nd November 2005 - 5:20pm
I'm using a Skoda 1.6 dizzy on mine. Part number ends with AB. The gaps on the rotor are the same as a GT as this is what makes SPi dizzy's run crap when fitted to GT's as the gaps in the SPi dizzy's are smaller.
You can use a hall sender from an SPi dizzy.
Andy
Wednesday 2nd November 2005 - 6:16pm
QUOTE (86C)
I'm using a Skoda 1.6 dizzy on mine. Part number ends with AB. The gaps on the rotor are the same as a GT as this is what makes SPi dizzy's run crap when fitted to GT's as the gaps in the SPi dizzy's are smaller.
You can use a hall sender from an SPi dizzy.
Yeah, the gaps affect the hall sender output used to control the ignition advance - as Digipants partially adjusts the idle via messing with the advance you'll get an unsteady idle with a non-GT dizzy. (or non-GT hall sender trigger wheel spacing).
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