will start and run perfectly at times but more and more often will start but only tick over at about 300 rpm no throttle response at that time sometimes will all of a sudden start to run correctly ses cycles on and off cruise drops out when ses lights seem to do this at just below or just over 0 c scanner says code is pulse width to long open and pulse width to short closed when I un plugged ect would sometimes get it to start and run but idel is very volatile when ect disconnected ect readings on scanner inaccurate cold engine show 200 f and up to 230 when engine at about 140 then the temp all of a sudden match up and are unstable until about 160 then the match up and are solid when ect unplugged scanner reading goes to 7 f and is steady
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1994 Chevrolet 1500 Pickup Question: 65 turbo db4 pump erratic starting and drivability problem
Answer #1Greg's Orange Auto (12262 Answers) , Orange, CA - (714) 361-9386globalhelper January 13, 2014, 06:10Master
could be cooolant temp sensor.what is your fuel pressure?
Replylarry wells, January 16, 2014, 02:00Rookie
try a new one oem same prob fuel pressure 11 psi tried new oem pump same presure