aftermarket chip time ?
Thread Starter
Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
I am receiving a "piggyback" chip for my 1988 today. It is coming from TPIparts.net. Cost was $106 shipped. I had them reset my fan temps, do away with the egr, VATS and cold start injector. We will see how it works. Using this, if you want to go back to everything factory, just take this part out.
Melting Slicks
Joined: Aug 2003
Posts: 3,395
Likes: 393
From: Lakeville MI
Looking at the circuit diagram, I think all you have to do is disconnect both the solenoid and switch and instead place a jumper between pins A4 and C15 so that the ecm thinks the EGR diagnostic switch is closing when the EGR is activated.
Instructor
Joined: Aug 2004
Posts: 203
Likes: 12
From: Caldwell Texas
I just installed my "piggyback" from TPIparts.net. It is like the OP's pics. In their instructions, they say to remove the blue cover, then plug the new board into the original chip/memcal, it (the original memcal) will be sideways. Then install it into the ecu. It's tight but will fit. No need to take the ecu apart. Just got back from a short, 20 mile drive. I unplugged the 9th injector and will be removing the EGR this weekend. Runs great.
