This is what a non tampered with ALDA device looks like.


Here is a tampered with one.


For boost pressure the easiest way to check is to temporarily tee in a boost gauge on the boost line running between the back of the intake manifold, and the alda device.

On my car I deleted the ALDA, and took that end of the boost sensor line and ran it in through the firewall. It runs to my VDO boost gauge in my ashtray.

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1981 300TD 4 speed manual
Euro bumpers, zender valance and skirts, H&R springs, billy HD's, leveled sls, real AMG Pentas 16x8 et11, vdo boost/egt gauges intergrated into ash tray, eurolights, led 3rd brake light