[img]smileys/smiley19.gif[/img]I have an older 97 sc1 that has run good but It has just started to loose power on the hwy and i meandrastically loose power !the car must be under full excel to get to 60 mph ( help )

 

There are many possibilities for this; dirty air filter, gas filter, throttle body, old spark plugs, wires, corroded coils, leaking intake manifold gasket, etc.. Try disconnecting the EGR valve wiring connector and drive normally. It won't affect the engine normally but if its sticking open there'll be too much exhaust gas entering the intake manifold diluting the air/fuel mixture causing all sorts of hesitation, erratic, stalling, and poor power to the engine. If this corrects the problem then cleaning it may help.

 

Please note that service has been kept up to date. Also I can heat something flapping or rattling under deceleration ?


Thanks Ducky

 

Mileage? Maybe time to take it to a mechanic for diagnosis.Edited by: ducky