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Red hot exhaust...
This would typically indicate either an aspiration or an exhaust problem.
"No flow = no go". I like the idea of checking your vacuum hoses, but if intake is not the problem, you may have a failing exhaust system. Rotted out
baffles in your muffler are hard to detect since at lower pressure (idle) they can "drop" inside the muffler, restricting the flow, but at higher rpm can "lift" allowing flow-thru.
Same can occur with the catalytic core.
Good luck!
Armie
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'94 850 154000kms '86 760GLE 272000kms
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