Compression Ignition Addict
Join Date: Feb 2009
Location: Bay Area, CA
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What could cause a temporary no start, but no engine codes?
I was towing my 11,000 pound toy hauler today. Climbed the Questa Grade n/b near San Luis Obispo. EGTs were steady at 1100 degrees during the climb, boost steady at 27 psi, 45-50 mph, stock engine temp gauge was normal until a few hundred feet from the summit and then quickly began rising. I backed off on the throttle and the engine temp slowly started falling and then I reached the summit 10 seconds later.
Starting the decent I used the brakes, triggering the tranny to grab a gear and hold it to help me maintain a slow speed. Shortly after the engine fan shut back off. When the road leveled off I added some throttle to maintain my speed, but it had no affect on RPMs, and the truck continued to slow. No check engine light was on... dash looked completely normal. Tried the go-pedal several more times, but it had no affect. Coasted off the road, RPMs continued to drop with speed until I had no power steering/brakes and came to a stop.
Shifted to park and tried to start.... cranked over strong, but wouldn't run. On inspection it had puked a small amount of coolant. Everything else was normal. Grabbed my SCT, found no codes. Returned to stock tune. Still cranked but wouldn't run. Then got on the phone calling for a tow. Just after getting the tow on the way I tried it again and it started with no fuss.
Drove home another 125 miles with no issues. Any idea what caused this?
2005 F250 6.0L 4X4 Lariat
ARP Studs, MBRP 4" turbo back, Banks intake, SCT X3 w/Innovative tunes, Gauges + ScanGauge II,
BulletProof EGR cooler, CAT EC-1 coolant, Coolant filter, Blue spring fuel regulator, Atlas 40 FICM