trito

iTrader: (1)

Hi guys,

I have a Zeitronix WBO2 and the reading I get fluctuate a lot. At idle it floats around 14.5-18.5 and sometimes spiked to 25-26. Under boost it bounces around 11-14. Could a vacuum leak cause this?

Thanks,

t.t.

cjernigan

iTrader: (13)

Does the RPM fluctuate as well? Surging idle means a vacuum leak or too lean of a fuel mixture. Both will cause it to surge.

trito

iTrader: (1)

nope rpm seems pretty stable even at idle.

cjernigan

iTrader: (13)

What engine management, injectors, all that good stuff?

trito

iTrader: (1)

Greddy manifold/turbo
RX-7 IC
1.8 injectors (testes and cleaned)
BEGI AFPR
Duel feed fuel rail
EMB with Autotune
Profec A Boost controller

compy

Well there is your problem.

em99sport

iTrader: (2)

What he said might be correct, but I've found that placement of WB too close to turbo can lead to fluctuating numbers on gauge.

trito

iTrader: (1)

oh I forgot to add that I have a RM DP so the WB is located pretty far from the turbo.