help still have secodary problems
 

bill is trying to figure out why we are still having problems with my 90 trying to get it to run right after deleting the secondries . we have tried everything . secondary map sensor with vacumme and without and still setting code 61. those with 90s did you pull the port throttle selonoid nd if you did . what did you do with the electrical connections did you jump them or just do nothing . help we are out of ideas

Re: help still have secodary problems
 

You probably have not made the calibration changes necessary. The Diff MAP sensor is showing inadequate vacuum is my guess,

Re: help still have secodary problems
 

corey did the prom for the car. we tried to different types of map sensors per coreys suggestion . what about the port throttle seinoid is it still in the circuit or not ????????

Re: help still have secodary problems
 

Although I have no direct experience with this mod, I always thought you had to keep the vacuum pump connected to the map sensor for the secondaries. The port solenoid has no feedback to the ecm so it doesn't even know it isn't there. That's why the vacuum sensor is under the ecm- to check to see if the secondaries are getting vacuum. be sure to hook it up to the pump, not manifold vacuum.

Re: help still have secodary problems
 

1990. Halibeck chip. Solenoid valve in place and electrical connections in still hooked up. Vacuum sensor hose off. Key on always.

Re: help still have secodary problems
 

The ECM needs a signal from the Differential MAP sensor telling it there's enough vacuum. Originally I had done that with a resistor connector plugged into the harness at the sensor. But Marc and Pete discovered a change to the calibration that would always allow secondaries to operate just keeping the Harness connected to the sensor. No need for vacuum.

Re: help still have secodary problems
 

thankyou everyone for your ideads .I will forward them to the zfdoc where the car is at presently . I am stuck at home 450 miles away with a bout of pneumonia. being a poor retired guy sucks .lol

Re: help still have secodary problems
 

Brad,if you still have the secondary vacuum pump run a hose from the vacuum pump to the secondary/differential MAP make sure the pump is pluged in and working

You'll also need to leave the secondary solenoid pluged in no need for vacuum to solenoid.

All should work fine.

Let us know.
Pete

Re: help still have secodary problems
 

that is the way she is hooked upand still show a code 61 . ?if the solenoid is bad could that cause this . when the car is running you can feel the solenoid clicking really fast .

Re: help still have secodary problems
 

we added wiring so the solenoid is outside the plenum .