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STABLE RPM 800 @"N", but 1100~1200 @"D" Base Boost
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Posted by KOSAAB [Email] (more from KOSAAB) on Thu, 2 Oct 2003 20:37:35 Share Post by Email
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RPM PROBLEM
I don't know why shifting to drive mode increase RPM so much.
About one month ago RPM rose to 1200~1300, so i cleaned AIC, TB, examined vacuum lines and made tight the loose cooper tube on TB for AIC hose, reset ECU, and got stable rpm.
I think the stable idling rpm shows vacuum leakage is not the cause. Tranny load due to simple shifting to drive mode can effect RPM?
Some sensor and cable is connected to TB?

BASE BOOST
I've checked base boost by the method instructed in BB( w/ Unplugged BPC solenoid wire, 3rd gear, braking to keep 3000 RPM and checked the boost).
Is it possible to get negative pressure of -0.3Bar(-4.35psi) as base boost? I tried three times but got the same results.
I used analogue gauge(Auto Gauge) connected to the hose to MAP sensor w/ T pipe.


I hope advice...

'96 9000cse
K&N Air Filter
Maptun stage3 ECU, (exhaust system will be replaced later)

posted by 220.73.165...

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