need help
04-26-2011, 11:35 AM
#11
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i guess it could be timing but you said that you already had the heads off and that should have been checked when it was put back together..
35 psi is ok but it calls for 37 psi..have you checked the mechanical pump as well? 3-7 psi @ 2000 rpm's..even tho you have 35 psi of fuel pressure you may not be getting enough fuel to the cool fuel pump..did you check pressure idleing or out on the water..
a bad injector will act like a fuel pressure problem also..
35 psi is ok but it calls for 37 psi..have you checked the mechanical pump as well? 3-7 psi @ 2000 rpm's..even tho you have 35 psi of fuel pressure you may not be getting enough fuel to the cool fuel pump..did you check pressure idleing or out on the water..
a bad injector will act like a fuel pressure problem also..
Last edited by ridefast77; 04-26-2011 at 11:41 AM.
04-26-2011, 12:33 PM
#12
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Dont worry, your not right!!!
you said the ignition timing was set correctly, have you checked the cam timing? what do the plugs look like?
Honestly, sounds like a huge vacuum leak to me. need a scanner so you can see what the map is actually saying and see fuel trims as well
04-26-2011, 02:13 PM
#13
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Dont worry, your not right!!!
you said the ignition timing was set correctly, have you checked the cam timing? what do the plugs look like?
Honestly, sounds like a huge vacuum leak to me. need a scanner so you can see what the map is actually saying and see fuel trims as well
you said the ignition timing was set correctly, have you checked the cam timing? what do the plugs look like?
Honestly, sounds like a huge vacuum leak to me. need a scanner so you can see what the map is actually saying and see fuel trims as well
04-26-2011, 02:41 PM
#14
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Fixx
nope timming checked out so its not that, there is no mechanical pump on a gen6 just the cool fuel, And when i replaced ther fuel pump last year i put to new injectorin to ...yeah i know alot of money in parts not to fix the prob. thats why im so irritated over the hole thing.
04-26-2011, 02:55 PM
#15
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so your saying theirs no fuel pump on your sea pump???? looking at a 97 formula as we speak and theirs one on each mpi engine's sea pump.. the electric pump in the cool fuel cant suck the fuel from the tank to the resivour..their should either be a mechanical fuel pump or a inline electric pump to feed the cool fuel pump..
04-26-2011, 05:23 PM
#17
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Dont worry, your not right!!!
you said the ignition timing was set correctly, have you checked the cam timing? what do the plugs look like?
Honestly, sounds like a huge vacuum leak to me. need a scanner so you can see what the map is actually saying and see fuel trims as well
you said the ignition timing was set correctly, have you checked the cam timing? what do the plugs look like?
Honestly, sounds like a huge vacuum leak to me. need a scanner so you can see what the map is actually saying and see fuel trims as well
04-26-2011, 05:37 PM
#18
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Fixx
just like it shows in the pic under fuel pump..
http://www.mercruiserparts.com/selec..._nbr=809994965
Last edited by FIXX; 04-26-2011 at 05:43 PM.
04-26-2011, 06:39 PM
#19
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Anyway, some basic mechanical diagnostics like comp test, leak test and cut open the oil filter to look for metal would be my next move.
BT
04-26-2011, 07:48 PM
#20
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Did you put it in base mode to time it. Could be the time chain jumped a tooth, you can check with a valve cover off. It could be ignition module, coil, vacuum leak, FUEL PRESSURE LOW/ lean condition, bad ground. I'm with Blue Thunder and some basic diagnostics are needed.
