Mercruiser 5.0 TBI

[Boost1134]

Having problem alarm does the typical 2 beeps When you turn the key on and then beeps once about every 2 to 3 seconds with engine running are not . Unplugged gear oil bottle no change , replaced tps no change . Anyone have any ideas ? . Thanks in advance

 

[dubs283]

use a scan tool to check fault codes, otherwise you can keep throwing parts at it til ya succeed

 

[alldodge]

What is your motor serial number?

 

[Boost1134]

use a scan tool to check fault codes, otherwise you can keep throwing parts at it til ya succeed

It’s to old to store any codes

 

[Boost1134]

What is your motor serial number?

OL624112

 

[dubs283]

It’s to old to store any codes

mefi will in most cases have some freeze frame codes

regardless, your engine has an active fault, i.e. the audible alarm is sounding thus indicating an active fault. a scan tool will identify this active code

i'll guess at it....intake air temp sensor fault

 

[Boost1134]

mefi will in most cases have some freeze frame codes

regardless, your engine has an active fault, i.e. the audible alarm is sounding thus indicating an active fault. a scan tool will identify this active code

i'll guess at it....intake air temp sensor fault

It’s a tbi old school throttle body injection

 

[dubs283]

It’s a tbi old school throttle body injection

i know, i read the thread title

tbi with a mefi controller, if you have access to a rinda scan tool or diacom you may retrieve the active fault. mefi 2/3 does have some freeze frame capability but as i stated earlier the fault is active, should be quite easy to retrieve

without using a scan tool, you may as well replace every possible sensor until the problem is corrected

still gonna stick with my guess of the intake air temp sensor fault

 

[achris]

Having problem alarm does the typical 2 beeps When you turn the key on and then beeps once about every 2 to 3 seconds with engine running are not . Unplugged gear oil bottle no change , replaced tps no change . Anyone have any ideas ? . Thanks in advance

What are you working on?
Make, model, year, serial number. For all we know it could be a tractor, in which case we could direct you to the Chambelin John Deer site.

Chris
iboats mod team

 

[alldodge]

OL624112

Thanks, comes up 1998 with MEFI-1
The lube oil bottle, over heat and low oil pressure give a constant alarm

Your beep every few seconds is on the list below


To fins out what code, you need a 12V resistor type LED or digital voltmeter with the tone function and a paper clip

Place paper clip and led as shown, turn key ON and start counting flashes. Normal no codes will flash a 12, as in Flash, pause, Fl, Fl, Fl, Fl longer pause. The cycle repeats 3 times

 

[QBhoy]

I might be wrong...but I don’t think un plugging the gear oil sensor would be a way of ruling it out.