OT: Need help on Astro - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68C15 · 07-04-2004, 08:10 AM

check the Throttle Position Sensor. if it is stuck at or near thr wide open range the ecm goes into "clear flood" mode & shuts off injectors. that sticking can also cause the other problems you stated. the older non OBDII systems didnt set the check engine light like the newer ones do. I can go further in depth with this if you want.
Todd
BTW it is on the pass side of throttle body under the EGR solenoid bracket. will need a T20 bit to replace. new one may be adjustable. I will check for specs on that in the mean time

07-04-2004, 08:10 AM	#1
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	check the Throttle Position Sensor. if it is stuck at or near thr wide open range the ecm goes into "clear flood" mode & shuts off injectors. that sticking can also cause the other problems you stated. the older non OBDII systems didnt set the check engine light like the newer ones do. I can go further in depth with this if you want. Todd BTW it is on the pass side of throttle body under the EGR solenoid bracket. will need a T20 bit to replace. new one may be adjustable. I will check for specs on that in the mean time __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card



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