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Modified by d0hhh12 at 9:30 PM 6/30/2007

 

Does the problem clear up after it is warmed up? This sounds like your IAC. The IAC is different on obd2 and obd1 cars, and an obd1 ecu would not "know" how to control an obd2 IAC, and vice versa. You can compensate by tuning the idle parameters on your obd1 ecu. From my experience, the IAC will still make a loud noise, but the idle will be more stable.

 

Are you throwing a CEL?

Have you unplugged the EVAP purge solenoid? If you haven't, that is most likely the cause of the bouncy idle and strange sucking noise.

 

It's your Iac. It's cuz your iac is obd2 on the motor and the ecu is looking for obd1.

 

which obd1 ecu are you using?

 

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Modified by d0hhh12 at 9:31 PM 6/30/2007

 

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Modified by d0hhh12 at 9:31 PM 6/30/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d0hhh12 &raquo;</TD></TR><TR><TD CLASS="quote">nope ont throwing a cel and havnt unplugged it yet.</TD></TR></TABLE>

Unplug it with the motor running and you will notice a dramatic change in idle. It should fix your issues. For some reason the OBD2 EVAP solenoid goes crazy when controlled with an OBD1 ECU.

 

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Modified by d0hhh12 at 9:31 PM 6/30/2007