Distributor Differences???

[System-G]

I read in a thread a little while ago that there may or may not be differences in the Distributors between the 1a and 1b...
I personally found the findings and reasons given complete tosh.

I know the SC dizzy is completely different.

However, Is someone out there that can definitively say whether there are differences and if so what?
Perhaps one for Mr Woods although any other references will be apreciated

Is there any differences in part numbers on the EPC? If so could they be posted too please?

TIA

[cartledge_uk]

They are different as people have running problems on the wrong dizzy, not exactly sure whats different inside though.

To tell the difference, look at the colour of the connector

mk1a dizzy has a yellow plug on it,mk1b has a cream coloured one,

sometimes the plug is grey,might be on the 87 crossover cars that though

[Icsunonove]

bu88er !

I wonder what the difference is though, it would be nice to know....

Anyone?

[System-G]

All three N/A Dizzy's I have have Yellow connectors on them...

We are having probs timing the N/A up on a dizzy I've recently cleaned up renewed the seals on.

Maybe we're not being patient enough working by torchlight in the dark...

[010on1986]

might it be the hall effect system within the distributor and its communication to the different ecu?

are the hall effect field cogs different?

[Icsunonove]

Can someone with a working EPC please check how many distributors were fitted and what the part numbers and dates are?

[010on1986]

I have photos of two distributor rebuild on ae92's

the early dizzy uses VAST ignition signals to its ecu and has a 4 pronged wheel inside it.




a nother rebuild thread on a red top does not have this wheel inside it , it is using the ESA ignition signals to its ecu.



I haven't a clue what I'm talking about mind you.

Hence I would speculate that if you use the early on the late it will get a single expected signal 4 times instead of 22.

[Icsunonove]

......sometimes the plug is grey,might be on the 87 crossover cars that though

Indeed there are ones with grey plugs, I've got one sat in front of me. FFS!

Can someone with a working EPC PLEASE look up this part number and confirm whether this goes with a 1a or a 1b:

Part No: 19100-16280

Could you also do same for this:

Part No: 19100-16090

Thanks in advance.

[Flat Pack]

Got the EPC at home, I'll check this evening if nobody else can before then

[System-G]

I have photos of two distributor rebuild on ae92's

the early dizzy uses VAST ignition signals to its ecu and has a 4 pronged wheel inside it.


Image Replaced With URL For Quote http://i55.photobucket.com/albums/g122/ ... build3.jpg

a nother rebuild thread on a red top does not have this wheel inside it , it is using the ESA ignition signals to its ecu.

Image Replaced With URL For Quote http://url440.imageshack.us/url440/7029/004ga9.jpg

I haven't a clue what I'm talking about mind you.

Hence I would speculate that if you use the early on the late it will get a single expected signal 4 times instead of 22.

Thos two are completely different to the dizzy's I have sat about. Thanks anyhoo

[PW@Woodsport]

right i posted that the early ones have a yellow plug,truth is some do some dont....ive no idea what toyota are playing at,some have grey plugs and some have cream plugs... i dont know what year makes them relevant to which,it seems like a mix n match job.

What i can confirm is if you put a mk1b dizzy onto a mk1a it backfires like mad,this was on a true A car and B dizzy.

As a rule id use the distributor that matches the ecu number going by the epc....

ECU..............................................................DIZZY

mk1A- 89661-17030 84/11-86/08...............19100-16090
crossover 89661-17070 86/08-87/08...........19100-16090
mk1B-89661-17140 87/08-89.....................19100-16200

[Icsunonove]

Thanks Paul, appreciate the reply.

[Flat Pack]

Part No: 19100-16280

Looks like you've got the info you need now, but that one applies to some 4AFE powered Carinas! Could be on some JDM stuff too as my EPC doesn't cover JDM models

[kaiowas]

There's also a 19100-16080 and a 19100-16190 which were both superceded by the 19100-16090 part so should be functionally identical.

[Icsunonove]

Thanks for all the replies. I am really struggling to get this engine timed properly (and I've done this loads of times before on various engines without any problem at all ) . Something weird is happening, I will post it up as a separate topic......

Part No: 19100-16280

Looks like you've got the info you need now, but that one applies to some 4AFE powered Carinas! Could be on some JDM stuff too as my EPC doesn't cover JDM models

LOL! Well that distributor was fitted to Alex and Anna's Mk1 NA ("The Slug" - RIP ) and that engine was particularly powerful. Perhaps it's a performance upgrade

[Polypedates]

Happened to have removed my dizzy yesterday, it's a Mk1b and it has a yellow plug.

[anna]

Thanks for all the replies. I am really struggling to get this engine timed properly (and I've done this loads of times before on various engines without any problem at all ) . Something weird is happening, I will post it up as a separate topic......

Part No: 19100-16280

Looks like you've got the info you need now, but that one applies to some 4AFE powered Carinas! Could be on some JDM stuff too as my EPC doesn't cover JDM models

LOL! Well that distributor was fitted to Alex and Anna's Mk1 NA ("The Slug" - RIP ) and that engine was particularly powerful. Perhaps it's a performance upgrade

Ha haa haa... - that doesn't surprise me - a crossover-tastic magical mystical engine...

Just shove that in bolly/boo/betty and be done

[System-G]

I don't think the colour of plug has anything to do with the dizzy. There are too many variations. Production will use whatever they have at hand that is suitable and meets the spec. I doubt very much they worried about which colours are available.

I had an interesting chat to Chris (Limey) last night and was advised the timing issue could have something to do with the TPS - which also in essence could have been the cause for my wanting to put a replacement dizzy on in the first place.
The original problem was a weird hesitation at around 3k rpm and again just before TVIS kicked in. My original thinking was sticky throttle or TVIS butterflies - so a faulty TPS could have been the cause.

This engine also has a suspected head gasket fault - only "proof" so far is mayo in the filler cap - but the mayo can't be seen anywhere else.
Not to mention the wiring loom looks to have been pulled apart for some reason and also a load of other things I am not entirely happy with.
Whoever rebuilt this engine 7k miles ago clearly hadn't had much (if any) experience with a 4a.

I am now at the end of my tether with this issue so will be removing the head and inspecting everything.

I basically want to do a full stripdown and rebuild so I can be sure it's going to stand up to the abuse we are going to give it - as it is our new track nail.
I may as well do things properly

Tom has done an amazing job so far - he has pretty much disected the ignition system on the 4A and documented everything backed up with some serious technical drawings which I am sure is going to help some else massively down the line

[kevin..in]

I don't think the colour of plug has anything to do with the dizzy. There are too many variations. Production will use whatever they have at hand that is suitable and meets the spec. I doubt very much they worried about which colours are available.

colour discriminations are Very much relevant
once again this unfounded idea that Toyota just used up random parts is laughable

though you would have to delve deeply into EPCs to follow what parts were allocated to which vehicles
and then factor in the mix and match maintainance that has occured in the intervening 20+ years

I'm sure I have an odd 1A distributer you can have for the postage Garrick if you need it I'll have a look later

[System-G]

I don't think the colour of plug has anything to do with the dizzy. There are too many variations. Production will use whatever they have at hand that is suitable and meets the spec. I doubt very much they worried about which colours are available.

colour discriminations are Very much relevant
once again this unfounded idea that Toyota just used up random parts is laughable

though you would have to delve deeply into EPCs to follow what parts were allocated to which vehicles
and then factor in the mix and match maintainance that has occured in the intervening 20+ years

I'm sure I have an odd 1A distributer you can have for the postage Garrick if you need it I'll have a look later

I think we need to agree our opinions differ here
Sorry, but I don't trust anything Toyota did then, let alone now - far too many variences (and please, please, please do not take that personally ).

Will let you know how we get on and if we need another dizzy (I have 3 here).

There is another thread that Tom started about gettting the damn engine timed up. The closest we've got timing is off a dizzy taken from a crossover engine, but the EPC part number says it's from a Carina (See what I mean about inconsistancy's? )