|
Re: Winter Upgrades
|
Re: Winter Upgrades
I see you went with the SS gimbal ring... What did you think of it? (That is the one we were talking about I believe)
Its on my list of things to set $$$ aside for next season. |
Re: Winter Upgrades
Quote:
The MAP I had was wayyyy over fueled. Ran good from idle to 2400, but then fell on it's face and spit black smoke out the back. Broke down and bought the MEFIBURN.com kit for $600. They supplied me with starter MAP based upon the motor specs. Uploaded it in the driveway and it sounds sooo much better. No black smoke at start up either. Gonna water test it Thursday or Friday and hopefully fine tune the settings. Put about 15 hours on it so far so should be good and broke in by now. |
Re: Winter Upgrades
got all the stereo wired and LED lights done last night.
Cooler tub http://i1197.photobucket.com/albums/...6A143A3323.jpg Side box http://i1197.photobucket.com/albums/...6A1AD84574.jpg |
Re: Winter Upgrades
well I splashed her today after installing the latest MAP. Better but not perfect yet. Off to Seattle for my daughters soccer tourney this weekend, but will be on the water every day next week til its perfect.
next saturday there is a fun/poker run here in portland that I want to attend. |
Re: Winter Upgrades
Good luck very nice
|
Re: Winter Upgrades
Spent the better part of 3 hours on the water yesterday. Got a gremlin somewhere. Eliminated the Knock sensor system and it didnt change a thing.
Gotta test the MAP, TPS and Distributer next. Something at 2500 rpms is throwing the system in safe mode. I know when I find it, it will be obvious, simple and probably overlooked. Heading to the water now. |
Re: Winter Upgrades
Good luck!
Sent from my DROID RAZR HD using Tapatalk 2 |
Re: Winter Upgrades
Just curious if your problem happens at 2500 RPM when you run the motor on water muffs? Will revving the motor in neutral set it off or is it an operating under load issue?
I was having some coffee this morning thinking about your dilemma. Is it possible the fuel system cannot keep up with fuel demand? One of the better ideas I have in those situations involves letting a competent buddy look at it for a moment, see what they notice. Sometimes walking someone through an issue you end up solving the issue yourself or they point out the obvious. Hope you get her dialed in. The summer is on the downward spiral here... |
Re: Winter Upgrades
Its only under load. put the motor in neutral and it revs to the moon. put it in gear and 2500 is max.
I installed a brand new Aeromotive fuel pump, connected to a fuel cooler and aeromotive vacuum regulated adjustable fuel pressure regulator. Gauge on regulator never drops below 38 lbs and sits steady at 41 at idle. thats why Im thinking MAP sensor or distributor myself. But im gonna start over and re-install the distributor, re-time, re-set throttle plates, new plugs and re-test. I picked up today a brand new TPS, MAP and Knock sensor & module and have a spare MEFI 1 box to use as well. There just nothing left after that. Ill figure it out Im sure. Im just not there yet. All else fails, Im dropping a Brodix high rise, 850 dominator and a MSD and I know that will run. |
Re: Winter Upgrades
I installed the new MAP sensor, re-set the timing, downloaded and used the new ECU and put in new plugs. No improvement. Next is the TPS sensor and distributor..thats all there is left
|
Re: Winter Upgrades
Is hate to pay the bills for everything you've done!! Will be a great ride for many many years.
|
Re: Winter Upgrades
That's the plan
|
Re: Winter Upgrades
Tonite was TPS, Distributor & coil. No change.
Disconnected the tach, thinking it might have been malfunctioning. No Change. Found a loose engine ground and positive battery cable. No Change. Blew out the entire engine management programs and started with a fresh install. No Change. Tomorrow Ill be Ohm testing the entire loom looking for a short or weak connection. If all else fails, ill be re-installing my Mefi 3 wiring harness and ECU and start over. I hate Gremlins that I cant see. |
Re: Winter Upgrades
I hate to hear this. I hope you are able to get it figured out and on the water soon.
Sent from my SCH-I535 using Tapatalk 4 Beta |
Re: Winter Upgrades
I suspect you have a harness issue. I read on another forum where someone had a similar problem with their boat going into safe mode. Here are some of the things they had mentioned. I apologize if i'm way off, or reposting something you have already read.
Also, I had experienced something similar with my Camaro after building the motor and installing my Vortech Supercharger/aftercooler. My problem was initially the knock sensor picking up noise from my Taylor wires, and an issue with my harness. After rewiring most of it and shielding and rerouting most of my plug wires my issue was corrected. Again, I hope this helps. Below is the link to the original post, I have added some snippets of what they discussed on their thread. 99 7.4L MPI will not rev up, runs smooth. [Archive] - Club Sea Ray "06-26-2009, 02:13 PM Here's how I'm understanding this. Scenario 1: The ECM is not detecting voltage from the knock sensor and goes into safe mode to protect the engine. Scenario 2: The ECM voltage monitor is continuously receiving a signal from a bad knock sensor and retards timing. Both situations would result in an rpm drop. The difference is a code will be set only with scenario 1. In Scenario 2 the ECM thinks all is well and does what it's supposed to, so no code. Does the ECM match the engine? If your original engine had MEFI1 or 2 then you also have a module which shuts off the voltage from the knock sensor to the ECM. This tells the ECM that a knock is present. Now let's say you throw on a MEFI3, which isn't designed to work with the knock sensor voltage module. MEFI3 works by detecting voltage directly from the knock sensor. This looks like it could be a major conflict, assuming you have the knock sensor module working in conjunction with the sensor. So with the module continuously sending voltage to the MEFI3 ECM (indicating no knock), the ECM would interpret that as a knock and retard timing. MEFI1&2 works completely opposite from MEFI3, regarding the knock sensor. MEFI1&2, no voltage to ECM indicates a knock. MEFI3, a knock is present when it receives voltage." "06-27-2009, 11:52 AM Today we found the pin J2-6 (Ignition Control Ref. Low) on the harness that plugs into the distibutor to have a dead short. The grounding out stopped when the rest of the harness was unplugged from the ECM, a Delphi Part. We therefore pulled the ECM for testing. I will keep you posted. I think the problem is in the ECM although no error codes or in the timing sensor. J2-6 is the pin for Ignition Control Ref. Low on MEFI-1 and -2. It's J2-3 on MEFI-3. It's supposed to be 0 (less than .5) volts and held there by the PCM. J2-6 is not used on MEFI-3. As above the knock sensor module is integral to MEFI-3. It's external on MEFI-1 & -2. The L-29s use J1-30 and J1-14 to directly connect the knock sensors to MEFI-3. If the ignition wires to the plugs run too close to the knock sensor wires, MEFI can interpret the cross-talk as knock and retard the spark. Use the scan tool to read the number of degrees that the spark is retarded. Should be zero. Forgot you have a sterndrive. J2-24 is the input from the sterndrive lube bottle. Make sure this circuit (906 tan/white) is not grounded." "07-07-2009, 01:03 AM IT IS FIXED....... After checking all the sensors and replacing the cool fuel system as well as all the injectors we finally decided to check the wiring harness and the ECM. Unfortunatly we were not able to find a good used or new MEFI 3 wiring harness to try with my existing MEFI 3 ECM with so we ended up trying a MEFI 2 harness and MEFI two ECM and that it was it. The boat is running great. Finally...What I need to do now is source a good used or new harness for my 99 7.4L MPI engine and try it with my MEFI 3 harness. If that still leaves a problem I will need to also track down a MEFI 3 ECM. The good news is I now have a running boat. My mechanic wants me to put on the MEFI 4 kit which is a new harness and ECM as a kit, as Mercruiser no longer makes a MEFI 3 available as DELPHI the manufacturer no longer makes them. Anyone have experience or thoughts on going to MEFI 4." "09-13-2010, 12:43 AM Wanted to put in a final comment to close this thread but let future readers know the final solution was not the ECM. I found a used harness on EBAY for the MEFI 3 and voila! Engine ran great. No obvious visual problems looking at the harness but I suspect a broken wire or faulty connector would fail once the RPM came up and the voltages increased. Hugely hard to troubleshoot. Older engines using EFI opens up the engine to major corrosion headaches. Moist environment and electronics, not such a good combo. Thanks again to all who helped me with this." Nick |
Re: Winter Upgrades
Quote:
I think today Im just gonna spend the time and put back on the motor my Mefi3 system. I know it worked when I pulled the motor out. |
Re: Winter Upgrades
Didnt get done all that I had hoped for, but did get the MEFI 3 harness' all prepped and ready to install.
Cleaned every connection with contact cleaner and a brush, then coated em all with Dialectric grease. Kinda busy all weekend, so it will be Monday afternoon before I can dive head first into that engine bay and swap out the systems. Bob at MefiBurn has been great. He's re-writing me a MAP to initially install and work from for the MEFI 3 ECU. Im gonna have some riser spacers made and install a wide band (5 wire) O2 sensors and A/F meter after I get it close enough to really fine tune it perfectly. |
Re: Winter Upgrades
Man i just finished reading this write, and i got to say great job, i like the back seat, also can u post a picture of the swim deck im very interested in something like that, and like u my Volvo Penta 7.4l wasnt enought i ordered a week ago a 540 and a bravo xr for it to b installed this winter
|
Re: Winter Upgrades
Gave up on the MEFI 1 system, reinstalled the MEFI 3 and fired right up. Albeit a bit rich.
Installed the factory 454 magnum MAP and she's still a lil rich on the bottom end, idle is a lil slow and rev limit will have to be raised. But other then that, Im back on the water and she pulls like a mad man. Today was first water test and found a few loose ends still that I need to tidy up a bit. Only ran boat to 4000 rpm up and down from idle for a bout 60 minutes and it's still being broke in. Got to looking at old MEFI 1 loom. Found 2 HUGE issues that were not externally visible. Two ground wire that were broken at the terminals and only connected by the heat shrink. One was directly connected to the ECU, the other the ignition circuit. Both pretty important. Going away for the weekend starting tomorrow, but will be on the water most of next week and Im gonna tune it til shes perfect. I am loving the 2.2:1 drive ratio with the 28p props. I think that once I get the EFI dialed in Im hoping to step up to 30p's. The 28's bite sooo hard and will be great for pulling the kids around on the tubes and boards. Its also a lot cheaper to switch props then re-gearing it. |
Re: Winter Upgrades
Quote:
|
Re: Winter Upgrades
I just went thru and cleaned up some picture links and updated a few photos as well
|
Re: Winter Upgrades
Damn Oregondunes............................Hats off to you for a fantastic job well done. Glad I am not the only looney on this forum. Been gone for awhile (No, not upstate) as work and life has been very busy. Just getting caught up with MOC and came across this and had to let you know that I was impressed with the job well done.
Tell me more about the motor? My 509 is running great but killed my bravo three after hitting something that did not move underwater at speed and tore all the gears in the lower unit but found a newer swept back design one and it has been working great. Keep up the good work. |
Re: Winter Upgrades
I had a bit of set back this past couple of years.
When I put the new motor together last year, I bought a set of used merlin heads. in my haste, I didnt have them magnafluxed and as it turned out, one was cracked. it didnt rear it's ugly head until the middle of this summer while I was amidst my tuning. needless to say I never did get it tuned before she really started flowing water where it didnt belong and hot exhaust gasses into the coolant channels. Yanking the motor the week after the 4th of july and getting a machine shop to make the repairs was pretty quick. putting it all back together was not. It's done now, but as with most folks that live North of Interstate 10, it's winter time. Today the high is supposed to reach 36, so the boat is winterized and put away with it's warming blanket til March sometime. The tuning curve should be relatively quick as I bought some risers with O2 sensors bungs and a data logger. |
| All times are GMT. The time now is 07:53 PM. |