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93 1.9td complete power loss and rough idle.
by
Thezorn
on 20 May, 2010 22:04
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On my way to work today my car started acting weird. It started running a bit loud and there was a very faint click under excelertaion. When I was almost at work it started to get less throttle response and less power under load. I was going to be late so i didnt really think to much of it.
Four hours later when I left to go for my lunch my car really began to get crazy. When I tryed to start it, it seemed like it was only running on one or two cylinders and was bairly able to keep itself running. While doing this it was just puking white and black smoke out of the exhaust. I popped the hood and I could not see anything wrong with is that was visable.
After about a minute of rough idleing it began to smooth out and idle cleanly, the smoke stopped and it finally felt like my car wasn't in the middle of a magnitued 8 earthquake. I didnt feel like driving it so I got my girlfriend to pick me up for lunch.
After work I had no choice so I had to try and limp it home. It had the exact same, what seemed like 2 cyclinder idle and smoked like crazy, I waited and it smoothed out after a while. So I limped it home. When it was under any sort of throttle there would be no response at all now. It also drove extremely rough and the revs sounded very bad.
I truly have no idea what would cause this, I was thinking maybe head gasket is blown? but i couldnt find any signs of leakage on the outside of the head or anywhere on the block, the engine wasn't over heating and was still running at regular temps. The only thing was the EGT's were super high and this makes me think it might have somehting to do with my injectore pump putting to much fuel in. ( just as a note it is a stock pump but it has the fuel screw turned in about 1 turn )
Any information is greatly appreiciated so i know where to start digging.
Thanks,
Will Zorn.
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#1
by
Thezorn
on 20 May, 2010 22:40
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How would I be able to check if this is actually the problem?
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#2
by
Vincent Waldon
on 21 May, 2010 07:25
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Pretty common problem with your particular engine...search for "AAZ crank" for tons of discussion. I would recommend not driving the car till you sort it out...if this is in fact the issue the engine is at risk of grenading.
Do some further reading and holler back if you have any unanswered questions.
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#3
by
Thezorn
on 21 May, 2010 19:01
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Alright i tried to go start it to see if there was any wobble in the crank pully but now it will not even start, When i turn it over it will fire then just die. I checked the timming belt and it has no slack. How do i check if my timing is off or if the crank sprocket is toasted?
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#4
by
Thezorn
on 21 May, 2010 19:46
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how do I rotate the crank to get this ligned up.
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#5
by
Vincent Waldon
on 21 May, 2010 20:01
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19mm 12-point socket on the crank sprocket will work, so will jacking up one wheel and turning it with the engine in gear.
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#6
by
burn_your_money
on 21 May, 2010 21:14
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so will jacking up one wheel and turning it with the engine in gear.
Much easier IMO. I use 4th. If you jack up the passenger side then you can look at the timing line while you are turning the engine.
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#7
by
Thezorn
on 22 May, 2010 10:33
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okay ill give this a try today, i have a fealing the timing is way off. When it was idleing it sounded like it was misfireing bad.
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#8
by
Vincent Waldon
on 22 May, 2010 10:36
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Sure sounds like it... and by far the most common way an AAZ suddenly has a large change in timing is when the crank sprocket is about to wobble loose.
Fingers crossed for ya!
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#9
by
Thezorn
on 22 May, 2010 15:43
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Okay, so i pulled my cam cover and took a look at my timing. With the flywheel ligned up and piston 1 Top Dead Center, The line on the back of the cam looked to be off by about 2 to 5 degrees, the can at cylinder 1 is aso not quite flat and the locking hole for the injection pump is off also.
Im guessing this means my timing is out?
What could be the cause of this? is the crank nose sprocket definatley at fault?
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#10
by
Vincent Waldon
on 22 May, 2010 16:15
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Yup that means your timing is out... next step is to lock everything at TDC with the various locking tools, get that crank sprocket off, and have a look.
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#11
by
Vincent Waldon
on 22 May, 2010 16:19
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#12
by
Thezorn
on 22 May, 2010 16:26
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Is getting at the crank sprocket very hard? From what i can see i need to take off all my belts and then the pullys off of the crank? And then the cover in between the engine and the timing belt? or is this cover not in the way
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#13
by
Vincent Waldon
on 22 May, 2010 16:28
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Yup, all that stuff has to come off..."cover" being the outer cover over the belt.
If you're planning to dig into this yourself and you don't have one yet you owe it to yourself to get a Bentley service manual... all the right pictures, all the right step-by-step instructions for anything you'll ever want to do with your car.
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#14
by
Thezorn
on 22 May, 2010 16:43
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Well as of right now i am
and you guys arre always here for info when im not. The only thing that im not certain of is the crank shaft sprocket
if it is the problem will i need to pull the motor to get the crank machined? or is there and easier way to do it?
As for the cyclinder head, i have a buddy that just replaced some bent vavles in his 1.6td head and if i have any questions im sure he will help me.
And if all else fails im not to far from the dealer
