Mechanics

UNDERDRIVE PULLEYS

1990 Ford Mustang

Engine Performance problem
1990 Ford Mustang V8 Two Wheel Drive Automatic

Hello I just put a set of underdrive pulley's on my 1990 mustang lx it already had a 65mm bbk throttle body and spacer and cold air intake, and direct fan. And after putting on the underdrive pulleys the car had better response but now my temp gauge is running about at 205-210 when before it hardly got to 200-205 and when sitting about 5min running sitting still, it got up to 225 whats the deal and what can I do to correct the problem I also have no shroud on right now but it didn't before. And I already put a brand new radiator in it. Any suggestions would be most beneficial thanks and one other things at what temp do I need to start worrying about thanks
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Timeturner
July 27, 2009.



Underdrive is not spinning water pump fast enough. Shroud would help and fan on all the time.

Docfixit
Jul 29, 2009.