scoflaw
Well-Known Member
- Aug 10, 2011
- 6,395
- Boat Info
- 1999 Powerquest legend 260 sx 502 mag
2005 Baja 242 islander 496
- Engines
- 502 mpi Bravo 1
496 mag B1
I run an Airtex, works fine and for quite a while
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My coolant temp sensors are good, both engines read the same resistance when cold. Problem is fuel pressure rises from 29 psi to 50 after about 15 seconds of run time on port engine. Spec. is 30 psi.You have 2 senders at the thermostat housing. 1 is to the guage and 1 is to the ecm to tell it to run rich when cold then lean out at temp. Atleast that is how it is on my 5.0 efi. Change that. Could be bad. Fixed my problem with fuel smell and smoke at start up
It really sounds like the fuel pressure regulator to me. The real work is just getting to itMy coolant temp sensors are good, both engines read the same resistance when cold. Problem is fuel pressure rises from 29 psi to 50 after about 15 seconds of run time on port engine. Spec. is 30 psi.
Indeed!!It really sounds like the fuel pressure regulator to me. The real work is just getting to it
LMBO!!And here I thought this was a thread about wealth...good read though.
The compression is 180 and all the cylinders, runs great, just runs rich cold.. Fuel pressure issue. I am going to try the whole fuel module removal , then take it apart on the bench . I'll pull the pull the cooling water lines come a few lines dual lines and the upper motor mountain bolts that attach the cool fuel module to there and pull it towards the SternSounds like dead cylinders. The ECM Is trying to compensate for the low vacuum due to dead cylinders.
I would do a compression test first before you start changing parts.
Access to the fuel pump and cooler is almost impossible without removing the riser and manifold .
I was able to simply pull off the cover plate. And all three individual components within (cooler, pump me regulator) we’re easily removed and replacedThe compression is 180 and all the cylinders, runs great, just runs rich cold.. Fuel pressure issue. I am going to try the whole fuel module removal , then take it apart on the bench . I'll pull the pull the cooling water lines come a few lines dual lines and the upper motor mountain bolts that attach the cool fuel module to there and pull it towards the Stern
I imagine it would be easier if it was a single engine facing forward, however I have twins with V drives and there's not much room. Unable to lay down there and work on it that way.I was able to simply pull off the cover plate. And all three individual components within (cooler, pump me regulator) we’re easily removed and replaced
Exactly what I was planning on! Good timesI did my regulator with twin 5.0's and a genny. Hang upside down, plan on atleast 20 F bombs, 10 you mother f er and about 1 qt of blood. Just have to bite the bullet and get in and do it.
Nicely Done! Doesn't it feel good when it all works out (For a lot less than HAVING to have a pro handle it! LOL)Got her done on Friday. 1 1/2 hours total. Fuel pressure now about 30 and steady!! Disconnected fuel line and water line at trans cooler, 2 motor mount nuts, slid complete assy to rear and out. Not terrible.
Yes, no more fuel smell, and smoooth idle!!Did that solve the fuel smell issue?
Absolutely!!Nicely Done! Doesn't it feel good when it all works out (For a lot less than HAVING to have a pro handle it! LOL)