1995 Chevy S-10 6 cyl Two Wheel Drive Automatic 135000 miles
Truck developed a problem with stalling after 15 minutes of driving. If starting fluid is sprayed in intake truck will start momentarily. Ignition was checked with spark tester and blue spark. Last part replaced was PCM. After replacing PCM truck was driven 2 hours before failure. When symprom starts to appear truck will start surging or bucking. Feathering of throttle seems to keep running until about 5 additional minutes when truck completly stalls. Letting truck cool down for 10 min will allow a restart and can be driven for a couple of min before stalling again. Fuel pressure guage was left installed and showed 60 psi a time of failure. I have a OTC 2000E scan tool but did not think to leave hooked up. Do not know what I would look for at time of failure. I really thought PCM not pulsing injector was going to fix issue. I have heard that the TCC solonoid in the transmission or other solonoids could intermittently short and cause PCM to go bad or maybe cause intermittent failure. Would not know how to diagnose. I am fairly skilled in Automotive diagnosis and trouble shooting to componet level and would like to stop swapping and pin point failure to componet. Parts replaced fuel pump, fuel filter, distributor cap and rotor, Ignition pickup, PCM, Spyder injector and fuel rail. Previous responses in other forums lacked any valuable troubleshooting advice. I appreciate any help. I know this is a weird one and most difficult to diagnose. Thank you!
Thursday, June 11th, 2009 AT 6:27 PM