Join Date: Jan 2003
Location: St. Louis, Missouri, U.S.A
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How high are you revving it? Most TD's have a rev-limiter at either ~6200rpm for 2.5s or 6650 for 2.2s. It works just like the overboost cut. Might also be an ignition miss from a problem with plugs, wires, coil, etc if you are below the rev-limiter. Could also be too rich. Not as likely for a backfire through the exhaust, but it COULD be too lean. If you have too much boost below a certain rpm (~3000rpm IIRC), and depending on ECM, it will cutout. Usually you have to run a grainger and floor it in 4th or 5th to make this happen.
In short, start eliminating things from the list above until your problem goes away.
Good luck and welcome to the world of fixing TD's.
1987 SC 2.5 intercooled [email protected]
-Stock short block and many other stock parts