After market speed density harness and early intake and EGR. Not sure how to hook it up or should I just plug it off? Any thoughts greatly appreciated.

 

you can buy a a block off plate on ebay or make one. you will need to program out the egr error 32 in the memcal.

http://www.ebay.com/itm/CHEVY-TPI-MP...ht_1037wt_1055

 

Can the ports just be pluged off? Hate to take it apart to remove egr. If so what is the port that looks like a 1/4" coupler with a small hole in the top of it? Thanks

 

is your egr factory negative back pressure or is it a positive back pressure?

Two types of backpressure EGR valves are normally used*positive
and negative. On GM cars, they are identified by the last letter of
the part number stamped on the diaphragm housing on top of the valve.
(Prior to 1988, they were not identified and can cause some confusion,
The letter 'P' stands for
positive backpressure and the letter 'N' for negative backpressure. If
there is no letter it operates on ported vacuum.

On the positive backpressure EGR valve, a control valve located in the
EGR valve acts as a vacuum regulator valve. The control valve manages
the amount of vacuum to the EGR diaphragm chamber by bleeding vacuum
to the atmosphere during certain operating conditions. When the
control valve receives a backpressure signal from the exhaust through
the hollow shaft of EGR valve pintle, pressure on the bottom of the
control valve closes it. When the control valve closes, the full
vacuum signal is applied directly to the EGR valve diaphragm which
opens the valve and lets the exhaust gas recirculate.

On the negative backpressure EGR valve, a hose connected to the upper
part of the EGR valve supplies a vacuum signal. Manifold vacuum is
also applied to the lower diaphragm through an intake port at the base
of the EGR valve. When manifold vacuum in the lower chamber isn't
strong enough to overcome the spring tension on the lower diaphragm, a
bleed valve closes, allowing vacuum in the upper chamber to open the
EGR valve. Exhaust flow opens a check valve in the pintle so that
vacuum bleeds to atmosphere and the valve rises, but tries to drop
again so it dithers to control EGR flow.

 

How do you program the egr error in the memcal?

 

ecm switch parameter for the code and max minimum mat for egr enable to disable egr function. is this is on your 85 it is in $1f

 

Thank You

 

Would the EGR temp sensor from an 85 Chev Corvette 5.7 350 TPI be the same as my 305 5.0 TPI ?

 

I think the only difference is slight pigtail length , should work.

http://www.zip-corvette.com/ProductD...GR-SR&CTitle=&

 

Thank You