lextoy

hi all, trying to figure out best path forward with this new to me 2018 crownline with the 8.2 mag ho 430 hp cat engine.
only has 76 hours on the engine since 2018 but is throwing a misfire code and might have a port side cracked manifold.
im thinking since the cats are nothing but trouble anyway, if the manifold is cracked, just go with headers and a tune out the cats. rather than redo with oem manifold...
got the merc diagnostic report and it does show a port side overheat once at 27 hours, temps dont look terrible, but i'm no expert, how hot is too hot?
no other active codes right now except the misfire. code 396
i will try to upload the report if anyone is interested. will do plugs and wter pump this spring. and drop it in one more time to check if the manifold is leaking or not.
advice on cat delete, is it still doable with a tune? i am in south jersey. so have 3 to 4 months to get this fixed up for the season.

lextoy

0-699 .........29 hrs
700-1499 ....15.4
1500-1999 ...1.8
2000-2499 ...7.2
2500-3499 ...19.7
3500-3999 ...2.9
4000-4599....0.6
4600-5149 ......0
5150-5150+.... 0
Total Engine Hours.... 76.8
----------------------------------------------------------
ACTIVE FAULTS DESCRIPTION
Engine_Misfire
Engine_Misfire

ITEM NAME ITEM VALUE
FaultNum 396
Frequencycounter 3
Runtime 76.5 h
Enginestate Run
Engspeed 2979 r/min
Loadpercent 58.08 %
Battvolt 14.42 V
IACdutycycle 103.02 %
Sparkadvance 30 ° BTDC
Knockoutput 0.00 °
Powerlimit 100.00 %
Demand 0.00%
TPSpercent 39.69%
Oilpressure 68.52 psi
SeaPumpPressure 13.90psi
Coolanttemp 169.34°F
Gearposition In Gear
Trimposition 129ADC
PortEMCT 104.34°F
StbdEMCT 86.31°F
M APAngle 10.61psi
O2CtrIState Closed Loop

------------------------------------------------------

02A_Open_circuit
ITEM NAME ITEM VALUE
FaultNum 364
Frequencycounter 5
Runtime 61.4h
Enginestate Run
Engspeed 1508r/min
Loadpercent 37.61 %
Battvolt 14.62 V
IACdutycycle 74.15 %
Sparkadvance 18° BTDC
Knockoutput 0.00°
Powerlimit 100.00%
Demand 0.00%
TPSpercent 17.71 %
Oil pressure 63.35psi
SeaPumpPressure 6.17 psi
Coolanttemp 171.16°F
Gearposition In Gear
Trimposition 50ADC
PortEMCT 155.16°F
StbdEMCT 135.72 ° F
MAPAngle 9.48 psi
O2CtrIState Closed Loop

------------------------------------------------------------
DriveLubeLow
ITEM NAME ITEM VALUE
FaultNum 153
Frequencycounter 3
Runtime 60.7 h
Enginestate Stall
Engspeed 0 r/min
Loadpercent 7.80%
Battvolt 12.75 V
IACdutycycle 10.00%
Sparkadvance 0 ° BTDC
Knockoutput 0.00 °
Powerlimit 100.00%
Demand 10.00%
TPSpercent 0.00 %
Oilpressure 0.46 psi
SeaPumpPressure 0.00 psi
Coolanttemp 133.54 °F
Gearposition Neutral
Trimposition 50ADC
PortEMCT 132.01 °F
StbdEMCT 126.28 °F
MAPAngle 14.77 psi
O2CtrIState Open Loop
-------------------------------------------------------
P02S_LeanRangePort
ITEM NAME
FaultNum 391
Frequencycounter 1
Runtime 41.0 h
Enginestate Run
Engspeed 2579 r/min
Loadpercent 56.72%
Battvolt 14.40V
IACdutycycle 96.14 %
Sparkadvance 30 ° BTDC
Knockoutput 0.00 °
Powerlimit 100.00 %
Demand 0.00 %
TPSpercent 37.10 %
Oilpressure 68.85psi
SeaPumpPressure 11.11psi
Coolanttemp 170.10° F
Gearposition In Gear
Trimposition 50ADC
PortEMCT 139.44 ° F
StbdEMCT 132.19 ° F
MAPAngle 11.76psi
O 2CtrIState Closed Loop

-----------------------------------------------------------
P02S_LeanRangeStbd
ITEM NAME ITEM VALUE
FaultNum 389
Frequencycounter 1
Runtime 41.0 h
Enginestate Run
Engspeed 2715r/min
Loadpercent 52.29 %
Battvolt 14.39V
IACdutycycle 98.96 %
Sparkadvance 30° BTDC
Knockoutput 0.00 °
Powerlimit 100.00 %
Demand 0.00 %
TPSpercent 34.66 %
Oilpressure 69.37psi
SeaPumpPressure 12.64psi
Coolanttemp 169.09 ° F
Gearposition In Gear
Trimposition 50 ADC
PortEMCT 137.25 ° F
StbdEMCT 126.79 ° F
MAPAngle 10.86 PSI
O 2CtrIState diagnostic

----------------------------------------------------
02B_Open_circuit
ITEM NAME
FaultNum 367
Frequencycounter 1
Runtime 40.3h
Enginestate Run
Engspeed 621 rpm
Loadpercent 27.47 %
Battvolt 14.23 v
IACdutycycle 54.42 %
Sparkadvance 10 ° BTDC
Knockoutput 0.00 °
Powerlimit 100.00 %
Demand 0.00
TPSpercent 0.00
Oilpressure 60.13 psi
SeaPumpPressure 3.14 psi
Coolanttemp 172.00 ° F
Gearposition In Gear
Trimposition 50 ADC
PortEMCT 117.50 ° F
StbdEMCT 115.14 ° F
MAPAngle 9.72 psi
O2CtrIState Closed Loop

------------------------------------------------------
02D_Open_circuit
ITEM NAME
FaultNum 373
Frequencycounter 1
Runtime 40.3h
Enginestate Run
Engspeed 621r/min
Loadpercent 27.47 %
Battvolt 14.23V
IACdutycycle 54.42 %
Sparkadvance 10 °BTDC
Knockoutput 0.00
Powerlimit 100.00 %
Demand 0.00 %
TPSpercent 0.00 %
Oilpressure 60.13psi
SeaPumpPressure 3.14psi
Coolanttemp 172.00 ° F
Gearposition In Gear
Trimposition 50ADC
PortEMCT 117.50 ° F
StbdEMCT 115.14° F
MAPAngle 9.72psi
O 2Ctr1State Closed Loop
-----------------------------------------------------------

PortEMCT_Overtemp
ITEM NAME ITEM VALUE
FaultNum 160
Frequencycounter 3
Runtime 27.8h
Enginestate Run
Engspeed 654r/min
Loadpercent 25.58%
Battvolt 13.95 V
IACdutycycle 52.81 %
Sparkadvance 1 °BTDC
Knockoutput 0.00
Powerlimit 100.00 %
Demand 0.00 %
TPSpercent 0.00 %
Oilpressure 51.60psi
SeaPumpPressure 3.44psi
Coolanttemp 184.66 °F
Gearposition InGear
Trimposition 50 ADC
PortEMCT 220.50 °F
StbdEMCT 195.10 °F
MAPAngle 9.33psi
O2CtrIState Open Loop

------------------------------------------------------------

GUARDIAN ACTIVE
ITEM NAME ITEM VALUE
FaultNum 9
Frequencycounter 1
Runtime 27.8h
Enginestate Run
Engspeed 717r/min
Loadpercent 28.58%
Battvolt 14.27 V
IACdutycycle 57.21 %
Sparkadvance 13 °BTDC
Knockoutput 0.00
Powerlimit 5.00 %
Demand 0.00 %
TPSpercent 2.90 %
Oilpressure 52.73psi
SeaPumpPressure 3.99psi
Coolanttemp 180.16 °F
Gearposition InGear
Trimposition 50 ADC
PortEMCT 216.50 °F
StbdEMCT 194.10 °F
MAPAngle 9.67psi
O2CtrIState Closed Loop

---------------------------------------------------------------

XDRPb_Rangelow
ITEM NAME
FaultNum 217
Frequencycounter 2
Runtime 0.0 h
Enginestate Stall
Engspeed 0 r/min
Loadpercent 7.80 %
Battvolt 13.27 V
I ACdutycycle 10.00 %
Sparkadvance 0 ° BTDC
Knockoutput 0.00
Powerlimit 100.00 %
Demand 10.00 %
TPSpercent 0.00 %
Oilpressure 0.41 psi
SeaPumpPressure 0.72 psi
Coolanttemp 72.09 °F
Gearposition In Gear
Trimposition 663 ADC
PortEMCT 72.09 °F
StbdEMCT 71.44 °F
M APAngle 14.22 psi
O2CtrIState Open Loop
----------------------------------------------------------
MODULE SUMMARY
Module: Helm 1 Mercury NMEA Gateway
Cal Id: 2.0.6
ECU SN: 018380
RUN HISTORY
Run History is not supported by this module
ACTIVE FAULTS
Fault information is not supported by this module
FREEZE FRAME
Freeze Frame History is not supported by this module

lextoy

good news?? sort of. port manifold isnt cracked. had the shop drop it in and check it over thoroughly. no signs of a leak. likely water splashing onto the manifold from side area of the engine hatch. they still dont like the water temps at the manifolds so will proceed with raw water impeller and plugs. was half hoping the manifold was bad as an excuse to upgrade to headers.
but never confirmed if the max volt cat eliminator was available or not, so i guess will stay stock for now. i just think the whole setup would be so much easier to maintain if the cats were deleted. will go that route in a few years when its time to replace the manifolds. should i be buying the parts, headers/cat eliminator, or a tune today?? anyone upgrade one of these stock EC 8.2's lately?

techman

I'm not sure why you think the cats are nothing but trouble? Easier to maintain without them? This is how this engine was designed and since the manifolds are fine, just go run it. Planning for a future problem that may or may not happen, is going to put a damper on your boating experience.

But it's your money and boat, however, throwing on headers and installing a cat delete tuning will not gain you much in HP on a stock motor. If you are looking to build a sleeper with a monster mill in the bilge you going to have a big $$ project and the 8.2 catalyst motor is not the place to start.

For your shopping enjoyment....

Here are headers:
https://www.cpperformance.com/p-7394...er-system.aspx

Here is the cat delete ECU:
https://www.cpperformance.com/p-1670...-computer.aspx

NOTE...both are specified for TESTING ONLY

Keith Atlanta

2 Things to add or question:
1. Arent CA and NJ the 2 stated where "CARB" emissions are a thing?
2. When the 8.2 first came out the cat delete and reprogram was worth like 20HP and/or 1 MPH.

lextoy

thx for the info guys. initially i thought if i had to replace one side, and seeing the cost for oem, might as well spend a little bit more and go with a better setup. all i am hearing about the cat systems is to avoid them, but i dont want to go to a pre 2010 boat or with a high power go fast that i dont have a good place to keep. whatever boat i have, for now, will be kept in the water, until i can move and install a lift. several people have warned me that the newer EC engines are always throwing check engine lights that are mostly nuisance lights. so ive ben reading as much as i can to get up to speed. i do have a friend who is merc certified and will help with issues that arise, but if there is an easy path to eliminating 3/4 of the nuisance alarms, then i am open to pursuing. looks like i can wait until its due for manifolds anyway, so i can put off any major decisions/costs for a few years. when the time comes upgrading for a little performance and alot of weight savings, and added reliability, if the costs are comparable, i'll still seriously look at the headers and tune.

techman

If you have a friend with Merc credentials, you are ahead of the game. At least you can deal with codes if the pop up.

I'm not convinced that headers and a tune on that engine will make it more reliable. And as it has been pointed out a cat delete/tuned motor is not legal to use on the water. I have no idea how any marine authority would enforce it, but something to keep in mind.

hogie roll

Anyone deleted these?

lextoy

So I'm in the middle of deleting the cats and finally getting rid of the check engine light. Cats are out, and no more codes for rear o2 sensors since I have installed the maxvolt cat eliminator computer. Still getting the misfire code and we think theres no spark at all to cylinder #3 so we are going to replace the coil pak for that cylinder bank, looks like one coil pak fires 4cylinders...
question for you all, if I've been running for the last 35 hours with a intermittent or total loss misfire on cylinder 3, what else should I be worried about? Loss of compression in #3? Misfire damage to piston or rod, anything else mechanical I should check out while I have it out if the water?
I know the cat likely is fried, plugged etc, but I don't care as it's out now. We were only getting about 4000rpm before taking it out if the water. Could have been plugged cat and now seems just as likely was only running on 7cylinders... Since manifolds look good and are back together, now main concern is misfire damage, just not sure what to check.

SB

iTrader: (1)

Do a compression test to see if cyl got washed down and lowered the compression .