No power

[dguy]

I have a 1997 305
At first startup there is no power. Idles reasonably well with a small shudder but when I drive I can only get about 30 mph out of it.
After approx. 5 min it clears up and runs pretty well. I've done both intake gaskets, plugs, rotor ,wires, 4 O2 sensors. Fuel pump was done about 18 months ago. Fuel pressure is about 59 psi at idle.
Getting frustrated and any help would be appreciated. Thanks

[79403ta]

what about the catalatic convertor ?? or muffler ?? sounds like could be stopped up or comming apart it sounds weird but your problems i see a couple of possibilities cat convertor, muffler or what about a fuel filter....TRUST ME ANYTHING IS POSSIBLE !!!!

[dguy]

Originally Posted by 79403ta

what about the catalatic convertor ?? or muffler ?? sounds like could be stopped up or comming apart it sounds weird but your problems i see a couple of possibilities cat convertor, muffler or what about a fuel filter....TRUST ME ANYTHING IS POSSIBLE !!!!

I don't think it is the muffler or cat as there is lots of exhaust. Thanks

[roadrunner_70]

If it runs well when warmed up, then perhaps something is telling your computer that it's warm when it's actually cold. Something such as your coolant temperature sensor.