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Engine Specific Info and Questions => IDI Engine => Topic started by: turbotor on March 10, 2006, 04:43:10 am
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my AAZ engine in my 94 Vento/Jetta needs more fuel under boost....
I have done the governour mod, and i have turned in the fuel screw until its smoke(light smoke) on idle. I have turned down the star weel and i have a modified boost pin but still cant get enoug fuel under boost.
Im running 15 psi of boost.
(piperX air filter and open exhaust)
What can I do??? :?
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Turn the star wheel down more, cut the pin more, and turn up the fuel till its just about at runaway. If that still doesnt do it, you are in need of a "built" pump, such as a giles pump, but since your in Norway, there must be somebody closer to build you a pump.
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where is this "fuel screw" you guys speak of? not inside the fuel pump is it?
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Turn the star wheel down more, cut the pin more, and turn up the fuel till its just about at runaway. If that still doesnt do it, you are in need of a "built" pump, such as a giles pump, but since your in Norway, there must be somebody closer to build you a pump.
Im going to try to cut the LDA pin so the metring pin can travel as far as possible and turn the starwheel down som more......but when Im turning up the fuel, the engine wont "comress" after I have rev it.
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where is this "fuel screw" you guys speak of? not inside the fuel pump is it?
It`s on the outside, on the back of the pump above the four outlets to the injectors. 6mm screw with a 13mm jamnut inside a cap, you can`t miss it!
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Now I have made a deeper cut in the LDA pin and turned down the starwheel and turned up fuel a bit more.....better but not good! :evil:
I have to wait and see what happen when Im changing the filter, it maybe clogged.
Have ordered GTD nozzles from TDtuning....I hope them help some too.
Maybe I have to go for a bigger pump head?
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Have you backed your idle control screw right out and adjusted the cable for the increased throw?
If not this will alow for more fuel yet before runaway :wink:
Also have you shaved the washer that goes around the pin for full upward travel?
Cut the pin till its maxed.
Once you have done all of this... You are into getting a pump built teritory :D
EDIT: I just read that it is for an AAZ, goto the FAQ and look at Smog's make your car faster and do all of the aaz tricks in there as well.
You should with only 15psi be BLACK as a starless night, with smoke. unless its like an HX40 @ 15psi :lol:
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It`s on the outside, on the back of the pump above the four outlets to the injectors. 6mm screw with a 13mm jamnut inside a cap, you can`t miss it!
so to get more fuel which way do i adjust it, is there any sense in adjusting it now with nothing else done?
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Have you backed your idle control screw right out and adjusted the cable for the increased throw?
If not this will alow for more fuel yet before runaway :wink:
I have backed it out some but I will try som more! :)
Also have you shaved the washer that goes around the pin for full upward travel?
Done.
Cut the pin till its maxed.
Done.
Once you have done all of this... You are into getting a pump built teritory :D
EDIT: I just read that it is for an AAZ, goto the FAQ and look at Smog's make your car faster and do all of the aaz tricks in there as well.
Done!
You should with only 15psi be BLACK as a starless night, with smoke. unless its like an HX40 @ 15psi :lol
hehe, it`s only a K14 but no smoke, yet.
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It`s on the outside, on the back of the pump above the four outlets to the injectors. 6mm screw with a 13mm jamnut inside a cap, you can`t miss it!
so to get more fuel which way do i adjust it, is there any sense in adjusting it now with nothing else done?
Yes, if it is a TD there is sense in turning up fuel.....turn the screw in for more fuel.
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final "blonde" question...where is the fuel pump? :D
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final "blonde" question...where is the fuel pump? :D
Look here: http://www.vwdiesel.net/phpBB/viewtopic.php?t=579
Alot of info and pictures of the pump and how to make the adjustments.
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Well now I am confused. With those mods on my 1.6TD I couldn't clear up the smoke till 24psi +/- 2psi, and the 1.9 pump has a bigger camplate! Once I went to GTD injector's I couldn't clear up the smoke until like 28psi. This was with the bigger k24 turbo as well.
Either there is somthing more that you haven't mentioned or your pump is wacked!
What are your egt's like at WOT and 15psi, what do they settle at? even at 30psi with my gtd's I couldnt get my egt's under 1500 F at WOT, never really got a sustanied egt reading either as they would just keep climbing, Too much fuel not enough air, and dynamic timing.
I have pushed lots of these pumps to the edge and they have all produced more fuel then the stock turbo can digest. :?
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Well now I am confused. With those mods on my 1.6TD I couldn't clear up the smoke till 24psi +/- 2psi, and the 1.9 pump has a bigger camplate! Once I went to GTD injector's I couldn't clear up the smoke until like 28psi. This was with the bigger k24 turbo as well.
Either there is somthing more that you haven't mentioned or your pump is wacked!
What are your egt's like at WOT and 15psi, what do they settle at? even at 30psi with my gtd's I couldnt get my egt's under 1500 F at WOT, never really got a sustanied egt reading either as they would just keep climbing, Too much fuel not enough air, and dynamic timing.
I have pushed lots of these pumps to the edge and they have all produced more fuel then the stock turbo can digest. :?
Yes Im confused too.....it`s a high milage engine so maybe the pump is wacked.....
I have some air bubbles in the inlet fuelline from the filter when Im reving the engine, some say it maybe clogged.....Im going to change this tomorrow and see what happens.
My egt gauge is`nt working anymore :oops: (from a diesel boat) so I have to buy a new one ....Autometer??
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Maybe it's just that I am more conservative in how my car runs, but I find the smoke isn't too hard to clear up. My idle advance is only a couple of clicks out and the fuel is set where it ran best at idle. Although initially when I put the 10mm pump on it was dark out and the power was insane. However, headlights would disappear behind me and I ended up taking some fuel out of it. Presently the fuel clears up around 20 psi and boost pressure settles around 25 psi. I should really try turning it up a little bit. I also need to get on making those custom LDA pins. I think that would help the smoke issue and improve power a bit as my car smokes coming onto boost but then clears up. Obviously it would stop if I rotated the LDA pin back toward the conservative side.
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Maybe I should take a picture of my home made LDA pin, its conservative like the stock pin off boost and allow max fuel under boost.
my engine idle at 900rpm, light smoke before turbo spools up then 0 smoke but it pulls great. :) the fastest IDI diesel in my town :wink:
vwmike: do you sell seal kit to the pump? I did see that i have a very smal leak at the fuel screw.
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Well small leaks, and bubbles in the fuel system are deffinatly holding you back. Does it cause it to miss at all?
Get the pump sealed up, the filter changed, and make sure the bubbles are gone. If you are still not getting thick black smoke even at 15psi, I am stumped, but will continue thinking it through. :wink:
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Well small leaks, and bubbles in the fuel system are deffinatly holding you back. Does it cause it to miss at all?
Get the pump sealed up, the filter changed, and make sure the bubbles are gone. If you are still not getting thick black smoke even at 15psi, I am stumped, but will continue thinking it through. :wink:
It doesnt miss...maybe a little(first 30 sec) when it`s very cold utside.
Going to change filter tomorrow and see if I can find a sealing ring(o-ring) to put on the fuel screw.
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vwmike: do you sell seal kit to the pump? I did see that i have a very smal leak at the fuel screw.
I'm sorry, I don't :(
I really ought to look into that.
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I have changed filter and that plastic valve on top of the filter....and airbubbles are gone!! and best of all car pulls better :D
....its dark so I didnt see any smoke :wink:
BUT on one side of the pump there is a adjustment screw, and when I look inside one of my scrap pump I can see that this can limit the travel like the boost pin. What is this for? :roll:
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I have changed filter and that plastic valve on top of the filter....and airbubbles are gone!! and best of all car pulls better :D
....its dark so I didnt see any smoke :wink:
BUT on one side of the pump there is a adjustment screw, and when I look inside one of my scrap pump I can see that this can limit the travel like the boost pin. What is this for? :roll:
ehh, opposide the cold start.
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so what does adjusting this screw do (in red)?
(http://pic17.picturetrail.com/VOL842/4102322/8647267/133207501.jpg)
oh and where is the fuel pump?
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that changes how much fueling you get when you have the pedal to the floor, i think.
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thats not gonna give me more fuel is it?
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thats not gonna give me more fuel is it?
That screw is called the "max throttle screw" if I remember correctly.
While the engine's turned off, get a friend to hold down the accelerator pedal while you look at the fuel pump. If you see the throttle lever (that swings when your friend hits the pedal) easily touch the max. throttle screw, then that means there may be room for the lever to swing further - yes this will mean a little more fuel for you.
Loosen the tightening nut on that screw with a wrench and then back the screw out by turning it counter-clockwise with a flathead screwdriver.
Without needing your friend's help swing the throttle lever as far as it can go with your hand (until it cannot swing any further) and then set your screw there.
I have seen some people completely remove the max throttle screw but if you step on the accelerator pedal with your weight it might cause a little strain on the pump throttle assembly. Thus push the screw back in a little bit so that the lever will always hit the screw at max throttle.
Have someone step on your accelerator pedal again and see how far your throttle lever actually swings. Does it swing all the way to the screw like you did with your hand? Should your accelerator/throttle cable need tightening? Anyway, if your throttle lever has moved any further than before, you'll finally have a little more fuel now. Go for a drive.
Make sure you don't smoke too much.. no more than a light grey haze. If you're fueling a little too much, push the max. throttle screw in a little more. I did this on a 1.5 NA Rabbit recently and it went from virtually no smoke to quite the grey smoker (only at WOT).. it was also able to chirp tires in 1st gear when it couldn't before.
Many VW IDIs already have full throttle swing FYI.. but it's worth checking.
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well i adjusted the fuel a little tonight (not the max swing screw) but the more fuel screw, and well i can go up hills easier now :D i didnt adjust it too much cause i dont want to damage the engine, but at least i know a little more of whats going on. And i drove with no music tonight and damn, i love the sound of a turbo :lol:
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The screw I was thinking about is right under this screw that is marked with red.
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my car has a nice haze compared to the dark as night cloud it used to have. i don't have any trouble chirping tires or going up hills. i've actually chirped going into second gear before. and i've had my tires spinning pretty good before too, like i could have kept them going. but that was in the winter when it was running awesome. the summer isn't as pleasing to drive.
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ya summer for me is gonna require an intercooler if i want to keep workin on the engine, winter was nice and all and especially nights, notice a big difference in performance, but summertime will be hot and cooling is a must. So this summer plans will be to get an intercooler, and 2.5inch exhaust system from turbo back into a magnaflow muffler with a tdi style tip, and im gonna fibreglass the rear bumper to get a smooth clan look, then paint the car. Gonna be sweet. Hopefully get rid of the diesel sticking to the rear problem.
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Does anyone use an electric lift pump to get more fuel at full throttle? I've always wondered if there are gains to be had there. I'd be curious to see what kind of vacuum the IP pulls at full throttle, and if you maintained a small pressure if you'd see any improvements.
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Does anyone use an electric lift pump to get more fuel at full throttle? I've always wondered if there are gains to be had there. I'd be curious to see what kind of vacuum the IP pulls at full throttle, and if you maintained a small pressure if you'd see any improvements.
Yes Malone is, but I couldnt tell you if there was an improvment or not as he always has had it in. What he really needs is a fuel cooler. Well that and a bigger IP, twins, and a bigger fmic intercooler, but... :roll:
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wow!!...I changed the small seal on my fuel screw and now its working!!!
I had to turn up the boost to 19psi to clear up the smoke!! :D
Now I need more boost......then I need more fuel...... :lol:
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I knew it had to be somthing, there is noway that a little k14 should be able to clear the fuel that a 1.9 pump can produce. :D
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yea, small part made big difference.
I`m going to change to a K24 turbo and bigger downpipe.
Somebody knows (estimated) max hp with the K24??
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wow!!...I changed the small seal on my fuel screw and now its working!!!
I had to turn up the boost to 19psi to clear up the smoke!! :D
Now I need more boost......then I need more fuel...... :lol:
whichseal might that be? got a pic anywhere?
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wow!!...I changed the small seal on my fuel screw and now its working!!!
I had to turn up the boost to 19psi to clear up the smoke!! :D
Now I need more boost......then I need more fuel...... :lol:
whichseal might that be? got a pic anywhere?
Its a small small o-ring on the fuel screw. can take picture tomorrow and put them on my homepage.
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that would be sweet, so far all ive done is turn the screw a bit, didnt do anything with the seal, but id like to know what it looks like for when i increase the boost. :D
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yea, small part made big difference.
I`m going to change to a K24 turbo and bigger downpipe.
Somebody knows (estimated) max hp with the K24??
With the stock pump... ruffly 120ish, its as much the pump that limits the HP as the turbo.
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yea, small part made big difference.
I`m going to change to a K24 turbo and bigger downpipe.
Somebody knows (estimated) max hp with the K24??
With the stock pump... ruffly 120ish, its as much the pump that limits the HP as the turbo.
Plan is to upgrade to a 10mm head and plunger, GTD injectors and disable the springs in the governour....i want too limit rpm with my foot.
K24 and FMIC and 3" downpipe.
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I dont think that the K24 will be big enough, you will run hot (egt's) and smokey all the time, I would look at a gt22 or gt25 or like a t3 50trim ect...
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I know one AAZ which have KKK24 from 1,6TD. He had dynoed ~150hp from it. But it is too small for that kind of power.
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Okay, maybe I have to find a bigger turbo then......are the t3 50 trim used on some std cars??
Need one fast because I wacked my K14 yesterday......I have raped it too long! :lol: