Starts and runs great but dies when you hit the brakes it dies
can be 50 reasons
but are this.
needs a 60k mile tune up bad.
1: EFI system has 12vdc power loss. (see dash dim?)_
2: engine misfires. horribly and idle controls failed, (all will like that)
3: engine floods, same.
4: engine fueling drops so low and lean the engine stalls.
5: bad engine, cam time or sparking way off or 45 other engine prob.
there is a test for each one, need a list?
and last, 6: the ISC is stuck close, or EGR stuck open
did you pull the DTC scan codes, the CEL blink test?
from the ECU?
is the CEL glowing (lamp in dash) running?
omg, this is not a carb engine is it, many 87 were.
1987 is a cusp year, in USA for end off all carbs. (EPA rules)
on Jan 16, 2014