Author Topic: no power in upper RPM **Now with Video. (Read 5561 times)

zozep · « **on:** October 27, 2008, 07:03:09 am »

So I just got my Jetta 1.6td on the road.. .. There are a couple of issues going on, I'm using a Giles pump - and the car jerks (the only way I can describe it) when holding a constant RPM of 2600-2800, all other RPM ranges are fine...pulls hard all the way to 5k. This morning, I wanted to take a video of the issue, , it pulls hard and boost seems ok. About 20 minutes into the drive, the car lost all power above 3k... Boost hits maybe 5 lbs, with my foot to the floor...can still hear it whirring but no power past 3-3500 rpms.
I'm using those crappy Prothe injectors, and it looks like a little bit of diesel is pooling at the base of them.
So, as far as I understand, its either a fueling issue, or a boost leak issue....
Whats the easiest way to check if its a boost leak?
I'll try to upload that video in the next little bit.

zukgod1 · « **Reply #1 on:** October 27, 2008, 07:48:12 am »

Better just go over the intake really good, sure sounds like a boost leak and/or the hose from the intake to the LDA came off or has a leak.

mk2diesel · « **Reply #2 on:** October 27, 2008, 08:34:06 am »

checked the fuel filter lately ? clogged will restrict the fuel , especially at higher revs ....

zozep · « **Reply #3 on:** October 27, 2008, 08:46:08 am »

Filter is brand new. Pump is new (Giles). New Cyl. head. New metal HG, new Chinese quality injectors from Prothes site, Turbo has no shaft play - rebuilt recently, I recently put a boost controller on it...not sure if that has anything to do with it or not... I wasn't able to get more than 14 lbs of boost so far. Smokes like crazy and EGTs go up to 1550 WOT.

zukgod1 · « **Reply #4 on:** October 27, 2008, 09:51:16 am »

Sounds like you have fuel but no air/boost. Either a leak or the turbo is giving up and not spinning as it should.

jtanguay · « **Reply #5 on:** October 27, 2008, 11:10:13 am »

i've been using prothe injectors for over 5000km now and they don't seem too bad... the injectors seemed 'wet' at the joint, but lately i dont see that anymore... i think it could be because they've rusted there :lol:

i want to take them off sometime and have them pop & spray pattern tested by Giles to give them a decent review.

i seriously think that the pump is getting starved for fuel... but the fact that you can hit egt's of 1500 that would mean that you are getting the fuel... where do you have your boost gauge connected? is it intercooled?

zozep · « **Reply #6 on:** October 27, 2008, 11:33:05 am »

Taking it for a drive at lunch, i can add a few more symptoms, revving in neutral seems to have no problem...it will rev quickly up to 4 - 4500.... Driving, its like as soon as it hits the power band, it looses power, my foot to the floor it will accelerate like my 1.6NA golf, no smoke. I hear the Turbo whistling, but it won't go above 2-3 lbs.

Thats exactly it, the injectors are sitting "wet"... It isn't intercooled yet, I just bought a GTD SMIC on the weekend, it will get fitted soon.

I think you may be right, that the pump is being starved for fuel... and I wonder if my other issue is related to this one... (the jerking between 2600-2800 rpms)
This is the first time I run this gas tank since I filled it in late july (it was sitting since last week...I put some diesel conditionner in it...but i was still thinking that it was waxxing a bit.

jtanguay · « **Reply #7 on:** October 27, 2008, 11:36:58 am »

also, what do you have it timed at?

zukgod1 · « **Reply #8 on:** October 27, 2008, 11:41:38 am »

Ya you are either starving for fuel (but I don't think that's it as you have Black smoke) or your turbo isn't spooling either due to a boost leak OR the bearings are just about shot..

Turbo's tend to leak oil when the bearing are about gone though.

zozep · « **Reply #9 on:** October 27, 2008, 11:54:18 am »

Its a weird one for sure, theres no more black smoke now...foot to the floor, i hear the turbo whistling and it doesnt go above 5 lbs, usually only 1 or 2 lbs though... and slow acceleration.

Don't think its the turbo either, its as fas as I know...brand new.

Timming set at...umm... .95 or .96 i think 96

zukgod1 · « **Reply #10 on:** October 27, 2008, 12:13:51 pm »

Well then I'm going with fuel/ lack thereof.

zozep · « **Reply #11 on:** October 27, 2008, 12:14:47 pm »

Ok lets go with that for now... What would cause A nice new Giles pump to do that?

zukgod1 · « **Reply #12 on:** October 27, 2008, 12:18:28 pm »

Well either you have a plugged fuel filter or the intank PU is mostly plugged.

Have you removed the Water seperator?

zozep · « **Reply #13 on:** October 27, 2008, 12:23:42 pm »

Didn't think i'd need to remove it... I'll look at doing that...

zukgod1 · « **Reply #14 on:** October 27, 2008, 12:53:01 pm »

They will fill up with gunk thus the remove.

Guess you could try to do a 2.5 gal tank on the floor with a line running to the IP to bypass the stock system just to see if that was the issue..