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1999 MIE 7.4 MPI ECM Parameter's
- bud37
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Re: 1999 MIE 7.4 MPI ECM Parameter's
- waterbug
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Re: 1999 MIE 7.4 MPI ECM Parameter's
STBD 40psi and steady
Port 40psi and slowly leaks down.
They both spike to 50psi when the pump turns on.
Where is the best place to begin? Fuel pressure regulator, injectors. Is this related to my loss of power issue or is this leak down a separate issue?
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Re: 1999 MIE 7.4 MPI ECM Parameter's
If you shut her off and try starting after 10 minutes, does she fire up right away or is she sluggish to start?
- waterbug
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Re: 1999 MIE 7.4 MPI ECM Parameter's
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Re: 1999 MIE 7.4 MPI ECM Parameter's
If you scroll through this, you'll see some perimeters for normal reading... https://d3gqux9sl0z33u.cloudfront.net/AA/AR/wetbristol/downloads/224953/Mercruiser_v8_7.4_8.2_litre.pdf
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Re: 1999 MIE 7.4 MPI ECM Parameter's
waterbug wrote:Source of the post ....There is also an inline pump mounted before the spin on filter and something that looks like a solenoid before that......
Can you post a pic of that?
- bud37
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Re: 1999 MIE 7.4 MPI ECM Parameter's
- waterbug
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Re: 1999 MIE 7.4 MPI ECM Parameter's
As far as getting engine to temp then shutting off for 10 minutes and restarting. (checking for leaking injector) It fires right away revs (1200 or so) then drops to around 400 then revs back to 1200 then smooths out.
The pics are of the inline pump before the spin on filter. It comes from the tank to the valve/solenoid? then to the inline pump SAEJ1171 then to the spin on filter then to cool fuel II. Both are set up the same way.
- bud37
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Re: 1999 MIE 7.4 MPI ECM Parameter's
On the throttle positions.....put them in the approximate positions they were in when you did the water test then remove the flame arrestor and compare the throttle plates to see if they are close to the same. Did you notice any timing differences or fuel flow between the two engines.
A reminder, try to avoid revving the engines at the dock excessively, damage can result.
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Re: 1999 MIE 7.4 MPI ECM Parameter's
Is there a plastic cover covering your fuel filter?
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