1 reply to this topic

[waynec]

Have 88 250 with 5.8 that stalls after about 20 min. Have confirmed no spark after stall. After engine stalls if you crank there is no spark, turn key back to 0 and crank engine will fire right up. Have replaced module, pick up coil and swapped out EEC relay. Any ideas ?????

[miesk5]

Yo waynec,

Welcome!

Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19
http://broncozone.co...7&mode=threaded

Notes:

Best to do this after a no start.  But if you want, do it asap.

PCM stores the Self-Test program in permanent memory. When activated, Self-Test checks the EEC system by testing memory integrity and processing capability, and verifies that various sensors and actuators are connected and operating properly.
Inspect the air cleaner and inlet ducting.
Check all engine vacuum hoses for damage, leaks, cracks, blockage, proper routing, etc.
Check EEC system including the wiring harness for proper connections, bent or broken pins, corrosion, loose wires, proper routing, etc.
Check the Powertrain Control Module (PCM), sensors and actuators for physical damage. TPS, ICM, DISTRIBUTOR, etc.
Check the engine coolant for proper level and mixture.
Check the transmission fluid & engine oil level and quality.

Make all necessary repairs before continuing with SELF TEST.

The engine temperature must be greater than 50° F for the Key On Engine Off (KOEO) Self-Test and greater than 180° F for the Key On Engine Running (KOER) Self-Test.

Run it around to heat the engine up and shift thru all gears including Reverse.
Make sure A/C is off and transmission is in Park (automatic); or in Neutral for a Manual & release clutch.
Then turn off engine, all accessories/lights (close driver's door) , etc.

Do KOEO test First

Post Code(s) here according to:
KOEO
&
KOER

A helper can assist you by counting the codes. Some use their smart phones to record them.
BEWARE OF FAN, BELTS, PULLEYS, HOT HOSES, IGNITION HIGH TENSION WIRES, AND ENGINE COMPONENTS.

 

...

and if you can electrically troubleshoot;  but this first  one is user friendly.

EEC-IV Diagnostics No Start:

http://troubleshootm...ot-a-no-start-1

 

http://www.garysgara...iagnostics.html