No top end power, hesitation

[Cheesetoast]

Ok, april 2, changed my water pump, got a peice of metal in the timing belt, messed up the head.  Finally got the work done to change the head with a rebuilt oem factory head from vw, apparently the bottom end was ok.

Before this happened, the car was running wonderfully, lots of power etc.

Sounds ok, but is lacking some power, more so high end than low end  after 3000rpm with it floored, it struggles to get to 4000-4500.  is this a timing issue? there's no bubbles in the fuel line, all the air intake hoses are tight.  Timing belt was changed, pully too, crank pully replaced (was starting to wear), new headgasket of course.  Boost pressure is steady, oil pressure is steady, temps are ok.

i just want this godamn thing running properly again.

Is it safe to drive like this or will i break this head like the last one.

[jtanguay]

is this a normal occurrence for new heads? do they require any kind of break in period?

did you time the motor yourself?  what did you time it to?

[burn_your_money]

I agree that it does sound like a timing issue

[Cheesetoast]

all the work was done by a veteran vw mechanic that i've been going to for years.  he timed it

[Cheesetoast]

fuel filter is 40,000km old.  been using b5 religiously, from the same pump.

[Kudagra]

fuel filter is 40,000km old.  been using b5 religiously, from the same pump.

Did he change pump timing?

[Vincent Waldon]

Yeah, unfortunately it really does sound like timing... cam or pump.  

Not that you want to give your mechanic the 3rd degree, but you'll want to ensure that he reset the cam timing *and* did the pump timing... sometimes I'll just politely say "how many millimeters did you set the pump to" and see what the response is.

[malone]

all the work was done by a veteran vw mechanic that i've been going to for years.  he timed it

Your mechanic knows about pump timing numbers; a long ago when he swapped my injection pumps I specified the exact timing I wanted (1.05mm) and he did it using the correct tools/gauge. Otherwise he'll go with factory numbers or possibly advance it a bit.

I would ask him to:

1. Verify your timing (cam timing too)
2. Confirm whether or not your pump timing is the same compared to your last tune up that was done by him sometime last year (if I remember correctly).

Also post the pump timing value here if you want to keep the vwdiesel.net community from second-guessing your issue.

[935racer]

IF its running fine in the lower RPM it is not your pump timing, its more likely that your cam timing is ever so slightly retarded, hard to say without hearing it.

[burn_your_money]

how long was it sitting for? I don't know the shelf life for bio but maybe it went bad? or maybe your fuel filter is partially clogged. Lots of possibilites

[Cheesetoast]

changed the fuel filter just now, used a vacuum pump to prime it, started fine etc, a tiny bit better, but still not right.

High egts = not enough fuel from the research i did.  Bringing it back to them first thing tomorrow morning, have them recheck the timings.  I'll lose my *** if my pump has gone now too, visa and mastercard think i'm a drug dealer.

[vixentd]

I replaced my 1.9 with a new engine, and had a similar problem.  Mine was a turbo charger that was hanging up. Perhaps due to my head being destroyed. It cleared up on a long hill, and has run perfectly after that.

If you had any wear on your crankshaft pulley I would guess that the grove on your crankshaft was worn.  935 racer has modified a number of cranks, so keep your eye on it closely.  All new motors come with the tdi crank installed from factory on the 1.9 ide.

Make sure at your next timing belt to change the sprocket also to check on wear.  No warning when they go.

[DVST8R]

High egts = not enough fuel from the research i did.  

Well your research was wrong then. Edit: Sorry I didn't mean to come across so harsh, was just typing fast and not thinking... :oops:

In a gas motor this is true in a diesel this is false. High Egt's in a diesel come from overfueling and or not enough timing. This is why you add a bigger turbo when you get a giles pump is to cool that extra fuel.

I'm gonna go with Dave here and say your cam / crank timing is out. As most cam locks for doing the timing in these engines are a bit loose and need to be shimed with feeler gauges. As well when you tension the belt it typicaly moves the crank a few degree's in relation to the cam and pump. This needs to be taken into account, so as to have the crank in the proper spot post tentioned not pre.

I know this from doing like 8 timing belts in a month when I had a bracket miss alineminet, that was eating belts. (only three belts all together, but it took lots of trys to figure out the problem) We got to the point that from hood closed to hood closed was like 15min.  :roll: I can still do it in mysleep.

[Cheesetoast]

I replaced my 1.9 with a new engine, and had a similar problem.  Mine was a turbo charger that was hanging up. Perhaps due to my head being destroyed. It cleared up on a long hill, and has run perfectly after that.

If you had any wear on your crankshaft pulley I would guess that the grove on your crankshaft was worn.  935 racer has modified a number of cranks, so keep your eye on it closely.  All new motors come with the tdi crank installed from factory on the 1.9 ide.

Make sure at your next timing belt to change the sprocket also to check on wear.  No warning when they go.

the crank pully had a tiny bit of play, this was also replaced during these repairs, so no problem there.  timing belt was done too, even though it waqs only 40,000km old, all the labor to get to it was already done. I'm going back to get it checked out

[foxracer1]

When i had fuel filters clogging up this winter from too much bio my EGT's were sky high that was from not enough fuel. The pump didn't have enough pressure for the advance. It would idle fine but high load and high speed it would lose power and start to miss.