1984 Jetta , TDI WE MUST! (1.9 AHU M-TDI)

[libbydiesel]

The mTDI pumps I build from new ones have a single idle spring and are solid on the idle.  I don't remember if the one that gave me trouble had an idle spring at the end of the governor spring and one in the control lever assembly or just one.

Oh, and my rabbit has a VNT15 on it but I haven't yet made the vane control for it so it is just wide open for minimal boost. 

[8v-of-fury]

Hmm, good point. I am not sure if my rover one has one in the control lever or not.

[8v-of-fury]

I could not see if the control lever has a spring in it or not, the fuel was too dark. I did however swap in a 1.6 idle spring that I had stretched out quite a bit.

What happened?

I now have a perfectly acting idle.. Jesus, what a pain in my ass. I have the throttle lever to throttle arm orientation so that the governor cage is at its most relaxed position ie. fully rotated CW.

HOWEVER! Now I have a very weak pedal.. Let me try and explain. I now have to push the pedal way further down to achieve the same RPM for whatever gear. Not like there is useless throttle at the beginning either, it blips the throttle with a faint touch. But the throttle is less effective? It's weird for sure.

I can push the pedal down and get good amounts of black. The idle screw is bottomed, and I can't go another spline on the throttle arm.. backing out the fuel screw brings the idle down.

Its leaps and bounds better, just gonna have to frig around a bit more. lol

[bbob203]

What is the normal position for the throttle arm?

[8v-of-fury]

Varies for each pump I have seen. I have seen different length governor shafts so it would change based on that.

[libbydiesel]

Use an idle spring that is a bit less stretched out and shim behind it so the lever doesn't have to move as far to get to the intermediate and main springs.

Or just get used to driving it.   

[8v-of-fury]

Stretched it too far.. DAMN IT lol. I figured I might have, I don't think I have another a.6 idle spring around.. I'll have to look.

so you think the rovers springs were so soft that the control lever was bottoming them out and they weren't able to act properly?

[libbydiesel]

I'm not sure if it was a matter of both springs being too weak and bottoming out before you got a decent idle or if the weaker of the two was too weak and the stronger one too strong and the desired idle right between the two.

Do you have any room to shim the current spring before it starts being compressed when installed?

[8v-of-fury]

Shim it how? like to make the idle spring take up a larger space?

[libbydiesel]

Pull the little clip off the end of the shaft and add a few washers to take up some space but only if there's space to eliminate without compressing the idle spring in the installed and relaxed position. 

[CRSMP5]

we ever figure out what the goofy lever on throttle arm to side of pump does??




cause even though i added 4 washers to my gov spring.. had to back down the idle way far.. mine sounds like its got a cam for the 1st min or so depending how cold it is.. 30 sec 80*f  2 min at 40*f...

ive not had smoke issues, not screwed with soot screw yet, egt max 1250 under ~21psi even when the head heat soakes and starts to bring coolent and oil temps up.. mine set at 118 also where most say 130ish to start.. i wanted little more retarded when i was breaking it in.. but been happy so why mess with it..

(****disclaimer, headed west out of denver it hit 1450 and now uses qt oil in ~200ish miles, but i think it was due to altitude, assume cooked oil seal on exhaust side of turbo, no puddles/runaway/new oil spots on back, but thirsty it is)

but tripple digit down highways, 5k in 5th.. 1250 max is most ive seen..

so with that imo my mix must be pretty good.. towed car back, up down hills.. stayed away from denver west side.. no temp probs.. more then enough power.. idle great.. so can it be due to my silly lever thing?

sorry just had bowl.. so ignore stuff in middle..

[8v-of-fury]

Were you doing like 150 mph?! 5000 in 5th on the CTN 02A ?!?! AWESOME and SCARY lol

I don't have an inter cooler yet, or the 02A yet.. SO I cannot say what is up. I am pretty sure I can slip my current new 210mm clutch no issue in 5th gear.

I was gonna gov mod it while I had it open, I'll prob do that tomorrow when I frig with the idle spring again and install my oil catch can.

[8v-of-fury]

btw, Chris.. that was the most understandable post to date lol

[libbydiesel]

btw, Chris.. that was the most understandable post to date lol

After I started reading it I actually scrolled back up just to make sure who the post was from.   

[CRSMP5]

no idea what 5k refers too to be honest, when my tach runs out, it starts back over at 4k.. and goes up again.. idle says 1800, 4k is 72ish mph in 5th.. 55ish in 4th.. its my referance point due to speedo innacuracy, hell no work at all now.. and i no own gps.. that belongs to legless..

but yes.. i know its been in tripple due to gps.. how fast.. no idea.. always do that silly stuff alone.. it was also 1st night breaking it in... after i backed it down from 28psi.. it really runs well and never saw past 1250 either.. but i backed it down.. one day ill buy my own gps for that and a go pro camera.. till then.. i know its been past gps tripple.. was not foot to floor when i did that.. and it was a pull in 5th from 75.. under 1 mile.. wind picked up and i backed off.. debate night was balls to wall maxed out in under 2 miles on freeway 3am... doors open... othh times..

too bad almost outta the 4bills a oz stuff... did not buy much to start with.. but so much smoother then the 1.25/oz stuff... i miss cali.. easy to mix it up there.. 4bill stuff hard to come by here.. and i gots a cookie and a cornbread muffin too.. like i was in cali or somethin.. but i paid for it.. in cali the stores tend to give up a cookie with purchase.. till other day not seen that here.. hell 1st time ever seen food here... but supply gone so will have to see if when i can get more.. back to cheap..

think of it like beer vs good booze.. one will get you a feel.. but your thoughts are different..