So I think I have been to the mountain after all the trouble this
car has caused.
I bought the Data logger , loaded the software. I hooked up and logged
things.
I spent all of Saturday putting a rear turbo in . The old one looked rough
visually caked crusty oil around inlet side. There groves on the in side by
the turbine, looks like it clearaced it's self at some point. But vaines were not as tight as they could be. They were very worn. The weld in the middle
between the turbo and the exahust side was also very blue in color.

I swapped out the coil packs, igniton module PTU. (I painted the bracket it sits on by mistake. I appears the PTU needs a clean surface to work???
I scraped it clean to the metal and replaced. )

Ok So for a ride we go. (Observation as went to close trunk deck lid the exhaust was much less on the pass side vrs driver????)

Drove car total of 7-8 minuets. 2x's About 1/2 mile each time.

Low RPM's(600-900) had a little cracking thru the exahust. The ignition
seemed to be improved. No feeling of crossfire. Better acceleration.. but a little blue cloud poofed behind me .
But it hits 1500 to 2000 and above .....back fire the car stumbles and
has what sounds to be a horrible fan screach, like it sounds like a in-dash heater fan gone wrong (bad fan bearing) but louder.
A short shift into 2nd proved that once the rpm dropped it had a little power but rpms rose quick and it started to pop and sputter and the whole car lurches some what like I was in too high a gear for speed. Then the fan scream sound again.(i backed out of it)
Data logger looked like non eventful. Knock = 1 time only out of 2 runs.
No boost really above 0. As it would build from neg to positve boost it would hit "0" and then it would make the screaming fan sound and I backed off. I think I could hear my BOV working under all the other stuff.

I mentioned to my Dad that the exahust seemed un = pre run.
He reminded me that when the car was in storage awaiting a engine half the exahust was off!!!!!!!!!!!!!!!
Well the storage shed has mice and they make nests.
I wonder if this a large exahust blockage? ? ?

HOW would my car act if there was a large exahust blockage or partial
obstruction?

If you turn key this car and let it idle . You would never know there was
a problem it is very smooth and almost dead quiet.????......

So What next any ideas?

Thanks Tim

_________________
Is it true that cannibals won't eat clowns because they taste funny?
What happens if you get scared half to death twice?

what happens if you rev it up in neutral? Given the condition of the rear turbo, is it possible the front turbo is fried?

If you rev it standing still , Neutral, it has a very normal crackling
type exahust sound.

I think the front turbo was fried and that's possibly the screaming I
am hearing on acceleration. Cause Hummm???

After the car was put back on the ground , new engine and all ,
Me and my Dad drove it around for well over 35 min and the car ran like a top . So all was working right, boost and all ! It was 30 min later
on my drive home when all went goofy. Backfires, slowly decreasing power and finally the fan scream.

How is boost generated? If 1 turbo is bad is no boost generated ???

Funny thing we took off the inlet side of the front turbo. I t didn't feel like
there wasn't any play. It looked normal to the naked eye .

SO I would assume there is something wrong inside not visible to the naked eye.

Thanks Tim

_________________
Is it true that cannibals won't eat clowns because they taste funny?
What happens if you get scared half to death twice?

That's what I was thinking... A bad bearing is what it sounds like to me.

If the turbo is partially seized I think that would restrict the exhaust flow. Then you wouldn't pull in enough fresh air to burn properly causing the backfiring.



My theory is that the rear turbo IS making boost. The pressure is lost through the front turbo and leaks back into your air intake.

I think we are getting close to an answer! This is great .

I won't be able to work on the car for another week so , I won't know
were we stand till then.

Tim

_________________
Is it true that cannibals won't eat clowns because they taste funny?
What happens if you get scared half to death twice?

I AM SO CLOSE !!!
WE HAVE BOOST!!!
Today I was able to swap out the front turbo...
It was trash the intake side didn't have much play but had a hard time spining freely. The exhaust side was toast many of the vanes were shatered. Not sure what caused it though.

Problems solved ..... yes and no.
We are now making a healthy boost 10-12lbs it appears.

But here is my problem yet...... When you put the car under
a load , as in at one point today I got it up to 50 -60 mph
but was in 4th gear ready to go to 5th. It was like 2500-2700 rpm
It starts to POP and miss and act like it's crossfiring.... it
did loose power it felt like.

It also stals at just about every Stop sign. What's with that??

Ran a diagnostic tester pre to the turbo change and the O2 sensor was
reading rich like all the time (the front one only). Rev it up it would go down 20 points , then it would resume the previous high reading. Also the
mVolt reading was at like .99mV and would never change. That all resolved once the new turbo went in.

Things I have change to date turbos , coils, PTU / igniton module.
We put back in the factory blow off , not sure if the aftermarket one
was working. Replaced a broken a vacuum / diaphram/ selinoid that goes to the purge canister.

So how can I isolate this miss ??? It purrs when it does idle and is warm.
Also no obstructions from we can see in the exhaust.
No misses when it sits and you rev it either.??

Thanks in advance for your advice.

Tim

_________________
Is it true that cannibals won't eat clowns because they taste funny?
What happens if you get scared half to death twice?

Any updates Tim?

Did you check out the front bank of spark plugs after you swapped the front turbo?

Sorry no updates. My Dad is being a jerk about finishing this thing
up. Thanks for the intrest!
I will post as soon as I work on it again.
Tim

_________________
Is it true that cannibals won't eat clowns because they taste funny?
What happens if you get scared half to death twice?

Well it looks like tomorrow my brothers are going to flatbed the
car home for me to work on! It will feel great having it home to work on as I can. So maybe this weekend I will get to it!
Tim

_________________
Is it true that cannibals won't eat clowns because they taste funny?
What happens if you get scared half to death twice?

THE CAR IS HOME!
Not fixed , had it flatbedded home.
But it's here and that means I can at least
work on it when I have time.
So work will begin in the next few days.
Spark plugs 1st to be checked
followed closely by the injectors.

Tim

_________________
Is it true that cannibals won't eat clowns because they taste funny?
What happens if you get scared half to death twice?