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Unread 12-31-2013   #1 (permalink)
green2man0 is offline Rookie


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Bend   Oregon
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Angry Having similiar issues to Rubenk. 1989 turbo swap running rich

So I'm still trying to dial in and fix some issues on my 1989 mustang with a turbo swap. Vacuum gauge and narrow band air/fuel meter installed. Vacuum reads 16in/mg at idle and mid 20s on decel. It goes to 0 and only builds a little boost on acceleration 3-4psi.(guessing this is a boost controller issue) The air fuel meter still reads max rich all the time (startup, reving, accel, and with the car warmed up). I've replaced the O2 sensor, ect and fan switch in the manifold as well as the temp gauge sender and the TRW box. Good news is the fan and gauge work as intended, bad news is I don't know where else to look or what to check.

Stock 2.3 block
forged pistons 8-1
turbo head
ported e6
t04e turbo
38mm external wastegate
volvo intercooler
new rings and bearings throughout
160lph pump (new filter)
36lb injectors (brown tops)
LA2 cpu with switchable mapping (toggle switch wired into console)

Let me know if you need any other info

Where should I look now?

PS I used stingers wiring guide for the LA2 swap and eliminated the egr as I used the wires for the VAM(big)
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Unread 12-31-2013   #2 (permalink)
mg man 75 is offline MODERATOR

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Elkhorn   Kentucky
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I will try some idea's.
Have you run codes and what are they?
Do you have cat and it is not plugged?
No exhaust leaks near turbo, exhaust manifold and o2 sensor. This will mess with it.
Vam mounted and hose from it and turbo has no holes in it and spring in it?
Are you sure no vac leaks in intercooler piping? I had a bunch when done mine.
IC Pipe Tester
Belt timing and engine timing correct?
Brand of plugs and wires?
Color and condition of plugs. Does all look rich or just one.
My ideas for now. Maurice
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1989 Mustang 2.3 turbo, rebuilt SVO motor, 88 computer,vam upgrade, adjustable boost control, intercooler, c-4 trans, 7.5 345 turbocoupe rearend, motorsport driveshaft, Black interior.


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Unread 01-01-2014   #3 (permalink)
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I had some similar issues with my turbo swap and turned out that my cam timing was off a tooth or two. I think Maurice pretty much covered all the basic stuff.

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Unread 01-01-2014   #4 (permalink)
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Had a similar problem narrow band gauge pegged full rich wound up being open ground at gauge no matter if it was at idle or throttle applied, check ground.
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