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Came here just to say this and you beat me to it. It can be tricky getting the correct EGR for these TBI engines though and the parts house brand is often a big fail.My issue was a bad EGR valve that caused pinging in my engine. Don’t overlook that.
I went through 2 from autozone that failed out of the box. I ended up ordering a NOS one online & it’s been fine since.Came here just to say this and you beat me to it. It can be tricky getting the correct EGR for these TBI engines though and the parts house brand is often a big fail.
That engine should not ping on 87 and definitely not on 89. It's designed for 87.
Richard
FIFYI checked the timming it around 10 degress notch not zero. I taped on the engine and i saw a knock spike on the scanner. So i am going to retard the timing to zero closer to the big notch
Tippex (if you have any) works. Dries faster than paint.I was going to put some white paint on the timing mark so i could see it better. I went under the truck and noticed two marks Do i paint both? thanks