I only had my front asfir skid on all my others were off at the time of hisssssssing.
Gas tank building excessive pressure & fuel smell. Dangerous for sure! Why does this happen? (3 Viewers)
- Thread starter 2001LC
- Start date
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ramangain
Clarksonian disciple
What was ambient temp at previous fillup and fillup with hissing?
Both over 100 degrees. 2nd fill up around 4k or 5k feet.
ramangain
Clarksonian disciple
So what you experienced is "normal"
"Yes", but working on a heat shield now.
ramangain
Clarksonian disciple
I would think that the Mr. T swarm of engineers would have experienced this during testing in Desth Valley or the Middle East. Yet they did nothing to abate the issue any further than was was finalized in the production.
Honestly, is this mountainizing a molehill perhaps?
Edit: it's been 20+ years and no safety recall or TSB?
Honestly, is this mountainizing a molehill perhaps?
Edit: it's been 20+ years and no safety recall or TSB?
ramangain
Clarksonian disciple
Do the 200s do the same thing? Any recall or TSBs?
ramangain
Clarksonian disciple
Jerry aren't you fully submerged yet in Pensecola? Did you and your rig get flooded out?
94SRUNNER
GOLD Star
Stay safe and I hope things improve for you! My brother and fam are out in Gulf Breeze working through the mess.
I had a bad one recently. Driving for 2 hours in 99 degree temps at about 5k altitude. Got home and heard venting and could see tons of fumes/spillage from the door. Cracked the cap and it started venting very loudly. Pulled the cap entirely off and it loudly vented for the next 5-10 min. That led me to believe the fuel in the tank was actively boiling.
My understanding was when you pull the cap it lowers the pressure and then the fuel boils vs. if it is sealed with higher pressure the boiling point is higher? So don't open the cap is what my take was after I had done the same thing.
Makes sense. Pulling back to PV=nRT lol
Eyedaho
SILVER Star
So you're saying the fuel boils in the return line just past the FPR due to the drop in pressure?
that's the logical explanation. Honestly I don't see how it could be anywhere else. There's residual past the plunger but it's open ended to the tank on the return, relatively. The supply is pressurized the whole travel length. HIghest rail temp I've seen is 159°F. I know there are some out there with higher than that even. I don't know how hot is too hot to start at the fuel rail. But it's higher than that.
I see incoming fuel to the rail at mostly 110° or less.
I see incoming fuel to the rail at mostly 110° or less.
Do you know your coolant temp and transmission temps while this happened?
Same thing happened to me in hot weather 90-100 degree weather climbing from 1k to 8k and very slowly at times due to sharp turn inclines, but my coolant reached 220 and transmission 230 so was running hot which caused gas to boil. Truck gauges never moved, i used bluetooth obd to monitor with torque pro.
Ran a similar elevation gain with a fresh timing belt, fan bracket and fan clutch in 90 degree weather.. and truck stayed cool never saw over 200 coolant, 160 trans...
I'm sure without the maitanance i would have been boiling.
For us slow learners....is the return line suppose to be pressurized? Is this a symptom of a failed FPR?
I had this happen once and have since replaced fpr and the vsv for charcoal canister in engine bay on my 06. Seems most think it's truck running hot and keeping coolant Temps in line and heat shield is the "fix"
