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rpms when shifting into gear is ?
Rpms in N is ?? both engines doing the exact same thing here ? both showing the same rpms as well ? Never stalls in N and you can throttle up and back down to idle rpm without it ever stalling in N using throttle only ? stock OEM set up here ? SCX drive or just gear lube bottles --- so something on the engine is not stock at all to warrrant an SCX drives if applicable . What the set up in detailed here. How new is the IMCO drive bottles install ? this happens on the water hose also ? Stock ignition ? whats the voltage readings when engines stalls ? and what is the voltage when you shift into gear ? what is voltage reading in N - still want to know what rpms are ? |
Originally Posted by SB
(Post 4635932)
most efi set up's if oil psi falls below a certain # the fuel pump will be shut off. this is only bypassed during cranking.
Originally Posted by BUP
(Post 4636005)
rpms when shifting into gear is ?
Rpms in N is ?? both engines doing the exact same thing here ? both showing the same rpms as well ? Never stalls in N and you can throttle up and back down to idle rpm without it ever stalling in N using throttle only ? stock OEM set up here ? SCX drive or just gear lube bottles --- so something on the engine is not stock at all to warrrant an SCX drives if applicable . What the set up in detailed here. How new is the IMCO drive bottles install ? this happens on the water hose also ? Stock ignition ? whats the voltage readings when engines stalls ? and what is the voltage when you shift into gear ? what is voltage reading in N - still want to know what rpms are ? |
Originally Posted by SB
(Post 4635932)
most efi set up's if oil psi falls below a certain # the fuel pump will be shut off. this is only bypassed during cranking.
Originally Posted by BUP
(Post 4636005)
rpms when shifting into gear is ?
Rpms in N is ?? both engines doing the exact same thing here ? both showing the same rpms as well ? Never stalls in N and you can throttle up and back down to idle rpm without it ever stalling in N using throttle only ? stock OEM set up here ? SCX drive or just gear lube bottles --- so something on the engine is not stock at all to warrrant an SCX drives if applicable . What the set up in detailed here. How new is the IMCO drive bottles install ? this happens on the water hose also ? Stock ignition ? whats the voltage readings when engines stalls ? and what is the voltage when you shift into gear ? what is voltage reading in N - still want to know what rpms are ? Both engines show the same rpm and only having an issue with one motor. Once I get passed the shift I have no issues throttling up or back down. Doesn't happen every time and only happens at idle. non stock set up - 540's with Prochargers. I've been running this motor set up with SCX drives for the past 3 seasons. Havent run it on the hose as boats in the water. Running MSD boxes. Havent checked voltage yet - planning to look at it again today |
Sounds like bad ground somewhere... |
Originally Posted by splashandburn
(Post 4636022)
rpms are 850 in neutral and 750 in gear.
Both engines show the same rpm and only having an issue with one motor. Once I get passed the shift I have no issues throttling up or back down. Doesn't happen every time and only happens at idle. non stock set up - 540's with Prochargers. I've been running this motor set up with SCX drives for the past 3 seasons. Havent run it on the hose as boats in the water. Running MSD boxes. Havent checked voltage yet - planning to look at it again today is this an CARB or EFI set up ? Alot of info needs to be known to even come close for a fix. |
Looks like the issue is the throttle position sensor. Anyone know if this is a standard GM part that might be available at a local auto parts store?
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I was trying to be funny with is carb or efi question - attempted humor by far ----- anyways
So you scanned the engine ? Try to mach up with an AC delco part number - I forgot what that part number is. |
Originally Posted by BUP
(Post 4636198)
I was trying to be funny with is carb or efi question - attempted humor by far ----- anyways
So you scanned the engine ? Try to mach up with an AC delco part number - I forgot what that part number is. |
I really don't know (have notg replaced a Merc 500EFI tps) but it sure as heck looks like this:
ACDelco 213-894 GM Original Equipment Throttle Position Sensor |
her is the factory look up:
https://www.marineengine.com/newpart...pnum=MER849903 https://cimg5.ibsrv.net/gimg/www.off...ea36940a0d.jpg |
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