VWDiesel.net The IDI, TDI, and mTDI source.
Engine Specific Info and Questions => IDI Engine => Topic started by: ant_43 on June 04, 2009, 05:08:26 pm
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Hi all, this is my 1st post, and i thought i'd get straight in with the questions! This forum has a massive amount of info, and i've already learnt a lot through browsing! I have an '87 mk1 caddy which i've recently had converted to an aaz 1.9td (it was a 1.6d). The aaz is from a '97 seat toledo, which had a pump with "electronic timing control" as i understand, and egr system (which i've blanked off). I sourced a 1.6 GTD pump to eliminate the worry of extra wiring etc with the original aaz pump. However, now it's all running, i'm not sure that it goes as well as it should do (or would with a standard older type aaz pump). I'd like to know what the experts on here think about this and whether i'd be better off sourcing a standard aaz pump, or maybe make a hybrid pump from the two?
Here's the offending caddy anyway:
(http://i476.photobucket.com/albums/rr128/ant_43/Caddy/IMG_1088.jpg)
Any help very much appreciated, thanks :)
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AAZ pumps
(http://cs-www.cs.yale.edu/homes/jag/vw/engine/diesel1.9/Pump.jpg)
(http://i197.photobucket.com/albums/aa85/vwaldon/AAZpump_back.jpg)
1.6 TD's pump
(http://www.dieselvw.com/images/RebuiltTurboPump1.jpg)(http://images.thesamba.com/vw/classifieds/pix/medium/2620670.jpg)
not much of a difference
12v to the solenoid in front of the pump and fuel stop solenoid
if there something one top of the pump, don't worrie about it. delete it
that suction thing might be able to replace that with the 1.6's peice arm thingy - it's to help with cold days
gn
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Check the FAQ for "making your 1.6TD a faster car" It'll go through the basics of tweaking the pump
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The 1.6TD pump should be able to provide all the fuel you need. What is it timed to?
Andrew
Ok, thanks, so the pump should be able to perform as well as an AAZ pump? I'm guessing i already have the more desirable boost pin? I don't know what it is timed to, but now you ask, it is quite lumpy and smokey when first started (to the degree that i need to use the timing advance lever), but quickly gets to a normal idle once warmed. After that it really doesn't seem to smoke at all during driving. Could this be an indication of incorrect timing?
Check the FAQ for "making your 1.6TD a faster car" It'll go through the basics of tweaking the pump
Thanks, the governor mod and other tweaks are on my to do list, along with stainless downpipe & exhaust and the necessary boost and egt gauges. Unfortunately i don't have the skills many people on here have to be confident enough to try these out myself! :(
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Any more insights on the suitability of the GTD pump on an AAZ?
And should my first "upgrade" be a stainless downpipe before i start fiddling with fueling etc?
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Hiya mate!
All coming out of the woodwork, first badboy and now you! You'll find some good stuff on here.
Laters!
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Hello there Mr Cheeseman! ;) Yes indeed, i've been floating around here for a little while and gained a lot of good info, finally got round to registering so i can ask the diesel gurus some technical questions. I'm sure most people on here have diesel in their cereal in the mornings
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Any more insights on the suitability of the GTD pump on an AAZ?
And should my first "upgrade" be a stainless downpipe before i start fiddling with fueling etc?
I'd help the poor thing breath before I added more fuel to the mix. Wish I had gone 3" for my SS down pipe. Mine is far better than stock, but could have been better.
SWEET CADDY !!!
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I'm sure most people on here have diesel in their cereal in the mornings
You say that like it's an odd thing to do?
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I'd help the poor thing breath before I added more fuel to the mix. Wish I had gone 3" for my SS down pipe. Mine is far better than stock, but could have been better.
SWEET CADDY !!!
Thank you! I think i'll be getting a nice downpipe sorted first off as it's a real bodge of bits from the donor downpipe and standard exhaust at the mo.
I'm sure most people on here have diesel in their cereal in the mornings
You say that like it's an odd thing to do?
Not at all, as Bill & Ted would say, it is "most excellent"!
http://www.youtube.com/watch?v=KGVwP7N5404
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The 1.6TD pump should be able to provide all the fuel you need. What is it timed to?
Andrew
Ok, thanks, so the pump should be able to perform as well as an AAZ pump? I'm guessing i already have the more desirable boost pin? I don't know what it is timed to, but now you ask, it is quite lumpy and smokey when first started (to the degree that i need to use the timing advance lever), but quickly gets to a normal idle once warmed. After that it really doesn't seem to smoke at all during driving. Could this be an indication of incorrect timing?
Check the FAQ for "making your 1.6TD a faster car" It'll go through the basics of tweaking the pump
Thanks, the governor mod and other tweaks are on my to do list, along with stainless downpipe & exhaust and the necessary boost and egt gauges. Unfortunately i don't have the skills many people on here have to be confident enough to try these out myself! :(
Get some timing kit, gauge etc and take a reading. Get it timed right, and runing correctly before worrying about spending money on S.Steel pipe and other 'ollucks... How will you insure this? Some of the companies these days don't even like wheel changes :'(
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I'm looking to get it timed correctly on a gauge soon, it's not something that i'd be able to do myself though.
I'm insured on it already, it only cost me an extra £28! 8) I'm 26, with HIC, and everything declared.
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I've had it timed up with a gauge now, it was retarded a little. It does seem more powerful now, and runs a bit quieter which is all good! However, if anything, it's actually got harder to start. It now takes a few chugs to start, i have to use the timing advance lever or it stalls straight away, and there is still a large amount of white smoke on startup. If its been running and it's still warm, it will start easily as it should.
Should i be looking at glow plugs / injectors? ???
Thanks
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my TD takes a few turns to start when cold and cuts out if i don't give it a blast of the load peddle (my cold start isn't connected) and its pritty smokey as it first fires up... is this not just normal for an old diesel?
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my TD takes a few turns to start when cold and cuts out if i don't give it a blast of the load peddle (my cold start isn't connected) and its pritty smokey as it first fires up... is this not just normal for an old diesel?
Ah really? Maybe normal then? Or you have the same problem as me!
I'm comparing it to my old 1.6d, which used to start first time absolutely perfect with no white smoke.
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I believe the 1.6TD pump is superior in many ways to the 1.9 pump. It's got way more adjustability and none of the quasi emissions control junk the AAZ pump has. If you really want more fuel and have a giant turbo to make use of it, you can always swap a 1.9 camplate in the 1.6 pump.
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my TD takes a few turns to start when cold and cuts out if i don't give it a blast of the load peddle (my cold start isn't connected) and its pritty smokey as it first fires up... is this not just normal for an old diesel?
Ah really? Maybe normal then? Or you have the same problem as me!
I'm comparing it to my old 1.6d, which used to start first time absolutely perfect with no white smoke.
actually thinking about it my old scirocco gtd used to be the same as well.
i've just been reading a thread on here about blow-by, by the sounds of it white smoke on first start up is normal?
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Right then! It wouldn't start at all this morning so i think i do have a problem, what should i be looking at first? :(
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my TD takes a few turns to start when cold and cuts out if i don't give it a blast of the load peddle (my cold start isn't connected) and its pritty smokey as it first fires up... is this not just normal for an old diesel?
its normal for a diesel thats slightly out of time with most likely a bad glow plug and low compression, and no cold start cable
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I've had it timed up with a gauge now, it was retarded a little. It does seem more powerful now, and runs a bit quieter which is all good! However, if anything, it's actually got harder to start. It now takes a few chugs to start, i have to use the timing advance lever or it stalls straight away, and there is still a large amount of white smoke on startup. If its been running and it's still warm, it will start easily as it should.
Should i be looking at glow plugs / injectors?
Yep - you've a plug (or two) duff.
A TD should fire up first stab, slight puff of smoke and NO timing advance lever ever (in the UK) - I'm so confident of this I'm not fitting mine.
The people who said it is normal to struggle to start and smoke need to fix their motors!
Oh remember to do the blue wire mod for when it's warm....
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Thanks Reg. As I never needed it on the old 1.6d, I thought it was odd to have to use the timing advance lever to start.
So, new plugs it is! The blue wire mod - is this for the coolant temperature sensor on the glow plug relay? I just disconnect this and the plugs will glow for the same length of time every time?
Any recommendations on where to get some new plugs? GSF?
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Get the bosch duratherms for your GPs and if it is warm out I don't know if I would want the glowplugs on full cycle everytime. Maybe save that mod if replacement doesn't work. When I had mine on a toggle switch it would actually start harder with the glowplugs on when the engine was warm.
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Right i've changed the glow plugs to Beru (i couldnt find bosch duraterms). It had NGK plugs in it beforehand.
It now starts great, no chug chug chugging! ;D
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I don't know if I would want the glowplugs on full cycle everytime. Maybe save that mod if replacement doesn't work. When I had mine on a toggle switch it would actually start harder with the glowplugs on when the engine was warm.
toggle switch??? (where is the banghead emoticon?)
The glowplugs don't cycle a full cycle - you cut it short by turning the key.
Mind you it sounds like this was merely a duff plug or two (did you test them or note any colour difference?) and not the hot start issue that plagues tired VW diesels.