TPI Questions

[Jennifer Rose]

At 10:32 PM 8/7/97 -0400, you wrote:
>> Thanks for the help.
>> 
>> This P/N thing is confusing.  I have the JTR book (and a bunch others)
>and
>> most say not to ground this pin.
>> If I remember correctly something to do with idle and deceleration. 
>Should
>> I be concerned????
>> I think a lot of this is tied to an automatic transmission, not manual. 
>Is
>> this true?
>
>I left mine open..sortta.  I'm using Aluminum Corvette heads that do not
>have the internal EGR passages in combination with a '86 VIN "F" TPI
>manifold.
>
>The EGR valve is still present and connected, but doesn't actually do
>anything since there isn't a supply of exhaust gas to the valve.
>
>Grounding the EGR feedback wire will set off the SES light (it simulates
>the EGR being stuck in the open position)
>
>Leaving it disconnected will also occasionally set off the SES light (there
>are a few cases where the ECM will command the EGR to actuate, then look to
>see what happened.)  Fortunately, temps down here are high enough that this
>doesn't happen often.  (been about 4 months since the last time the code
>went off) It will also clear itself within a few minutes of driving.
>
>Someday I'll have an EGR flange welded to one of the exhaust headers to
>supply external EGR.. but it's a low priority.
>
>Curt Martin (cmartin at america.com)
>Ormond Beach, FL
>http://www.america.com/~cmartin
>'87 350 TPI Camaro.. (used to be a 2.8L V6 :)
>
>If ya have a 165 ecm - the prom can be modified to disable egr error msg

Vance

PS sorry to append this to a long message