- OFFICIAL GEARHEAD -
Join Date: Jun 2004
Location: Houghton MI !frosty nights!
My Ride: Ram HFE/Omni/SL/XR7
Engine: 2.5 TII, SMEC, .60/.63, 2-piece, 52mm, no B/S ;)
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Re: Need Help with troubleshooting
'overboost' means the MAP sensor has detected boost pressure exceeding a setpoint;
at which point the ECM shuts off fuel to the engine,
resulting in "Overboost Fuel Cutout" .
when MAP sensor shows boost P below setpoint, ECM turns fuel back on.
this can result in a cycling:
overboost surge / fuel cutout / overboost surge / fuel cutout ...
if you keep your foot in it
on an older un used TD like yurs,
9/10 of the time its a plastic vacuum line, elbow, or connector thats leaking.
our old TDs used a lot of plastic vacuum lines which become brittle , crack, and leak.
this can be a Nightmare for driveability,
and can cause all sorts of random operating issues.
I suggest a THOROUGH inspection of all vacuum lines, connectors, etc;
replace any/all suspect...
unless you want maintain it as stock appearance,
I further suggest replacing all original vac lines with new vac line,
auto stores & hardware stores carry it by the foot in numerous inner diameters,
aftermarket also offer 'silicone' vac lines if yu prefer (or want a color)