80tq- lean mixtures/low boost (long)

[ed armstrong]

Brian,

Have you checked the CIS airmeter plate for smooth
action. Your system may have a potentiometer that
measures plate position that may be out of wack. Idle
mixture and timing OK? Cam timing ?

I've done a 90q turbo swap too, but kept the CIS-3
system so unfortunately can't be a good resource for
your particular setup.


--- "be_larson at access-4-free.com"
<be_larson at access-4-free.com> wrote:
> I am having a few teething problems with my 88 80tq
> project,
> and I am hoping the collective can help me out.  The
> wiring
> is done, and the car starts and idles fine.  No
> trouble
> codes flash (4444), and the knock light does not
> turn on
> when driving, but...  The car is sluggish (compared
> to my
> chipped 5ktq?s) , and the boost does not rise to the
> level
> it should.  I have a electronic mixture gauge
> installed, and
> it shows the boost being way lean any time the
> analog boost
> gauge has more than about 1-2 lbs boost.  Something
> is
> making the mixture lean, and that is causing low
> boost
> pressure and timing retard?
>
> The car has mc-2 engine with k24 turbo, MAC11 wiring
> and
> harness, QLCC (I tried a stock ecu and no
> difference),  5kt
> intercooler, 5kt fuel distributor and injectors, urq
> airbox
> lid and igloo.
>
> I have excluded all of these items already;
> Changed fuel pump (old one was noisy) and fuel
> filter
> Set warm idle mixture to OXFV duty cycle of 42%
> Replaced intermittent connector to WOT switch
> Tried two different WOT switches which both tested
> good
> Bridged WOT connector at idle, and WGFV does cycle
> Unhooked MF Temp Sender connector, but boost and
> mixture do
> not change
>
> I am thinking of trying this next;
> Check Fuel pressure (have to borrow this tool)
> Vacuum routing issue?
>
> At this point, if it is not the fuel pressure, I do
> not know
> what to try next.  Does anyone have any other ideas?
>
> Once this problem is fixed, I will post the how I
> did it
> article on the conversion to the archives (which I
> have done
> already), but I want to finish the project just in
> case
> there are any items that caused this issue that I
> should
> warn the next guy about.
>
> Thanks in advance for everones ideas and input,
> Brian
> Saint Paul MN
> Please copy blarson at zeiss.com on reply
>


=====
-ed

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