I have changed my computer system sometime ago to the 87 ecm. I have someone working with me on the chips and the boost on the chip is set up to remove a small precentage of boost threw 3rd and 4th gears. I am not getting that I am seeing a increase in boost in 3rd and 4th gears. This increase is not a small little creap I am talking 2nd to 3rd 2psi increase and 3rd to 4th 2psi more for a total of 21psi. this making the car very difficult to program chips for. Has anyone seen this problem using the 84 waste gate with a 87 ecm is there any modifications that need to be made to the vaccumm configuration. Any additional information needed to solve this problem would be greatly appreciated. Thanks Tracy