TexasLandCruiser
SILVER Star
FJ62 with 5.3 2011 Erod gremlin. I’ve only been in situation at high elevation 2 times when hot. Both times fuel pressure loss. Here’s what’s been done to take some guess work out. These were all legitimate issues eliminated:
Rewire harness, bad grounds and power
New intake tubing and tuned/dyno
Fuel evap system removed
Cats removed open tuned to MAF
New MAF wires checked good
New MAP wasn’t functioning
New fuel cap
New fuel regulator and filter
New fuel pump 18 months ago
New Oxygen sensors NGK
New throttle sensor ACD
Throttle removed and cleaned
Vacuum leak smoke checked - good
Fuel rail bleed down hold 50+
In tank pump
Regulator and filter same mount on frame, no return check (that I know of other than disconnected evap)
Ok so leave sea level and get to 4000ft warm outside and like clock work starts leaning out, maxed out stumbles and dies, cool off runs 10 minutes and does it again until I get to lower altitude.
Stopped at auto parts and put a gauge on rails, read 60 psi drive again to duplicate and after heat soaked pressure dumps rapid, Fuel pump in tank pegs out at 60 and dumps again. Over and over. All that said I’m thinking 3 things: injectors won’t bleed like that, seems like vapor lock but FI, pump runs strong and less than 2 years old. WTH!?
Ok I’m done
Rewire harness, bad grounds and power
New intake tubing and tuned/dyno
Fuel evap system removed
Cats removed open tuned to MAF
New MAF wires checked good
New MAP wasn’t functioning
New fuel cap
New fuel regulator and filter
New fuel pump 18 months ago
New Oxygen sensors NGK
New throttle sensor ACD
Throttle removed and cleaned
Vacuum leak smoke checked - good
Fuel rail bleed down hold 50+
In tank pump
Regulator and filter same mount on frame, no return check (that I know of other than disconnected evap)
Ok so leave sea level and get to 4000ft warm outside and like clock work starts leaning out, maxed out stumbles and dies, cool off runs 10 minutes and does it again until I get to lower altitude.
Stopped at auto parts and put a gauge on rails, read 60 psi drive again to duplicate and after heat soaked pressure dumps rapid, Fuel pump in tank pegs out at 60 and dumps again. Over and over. All that said I’m thinking 3 things: injectors won’t bleed like that, seems like vapor lock but FI, pump runs strong and less than 2 years old. WTH!?
Ok I’m done
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