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Overboost cutoff- Memory locations found!
Well, the boost is starting to rise on my 89 200TQ...........
I found the memory locations for the overboost cutoff
on the MAC11 and the MAC14 ECU's.
I must admit that I found them rather easily once I saw how
it was done in the MAC-02 ECU (I can't take too much credit
as RDH provided me the MAC-02 data ). I reprogrammed the
stock EPROM and now I get cutoff at around 1.9 bar. I LIKE IT!
No more hardware hacks required to keep the fuel pump running.
I need to find the boost map that is used to control the WG
solenoid duty cycle. If I find that map I should be able
to reprogram it to allow the computer to control the boost.
A slightly stiffer WG spring will be needed as well.
The timing map boost values should be changed as well.
The search continues........
Scott M.