Ecu

[Jbaref2]

Were are the ecu boxes installed on a 2007 yamaha ar230 mr1 ho boat

 

[Speedling]

Big black boxes behind the motors on bacl wall.

 

[Murf'n'surf]

Were are the ecu boxes installed on a 2007 yamaha ar230 mr1 ho boat

What's wrong with them?

 

[Jbaref2]

Well I seem to be dumping fuel in the number 4 cylinder on my Mr1 engine borrowed a coil from another good running Ar230 no change new plugs no change really getting aggravated with this one any help

 

[Ronnie]

Switch the ecus between your engines if you verify that you have a bad one co snider sending it in to carmo for possible repair at a cost of about $300 otherwise buy a new one for $1,100ish. Some,times I see used ones online for $600 or so but I wouldn't buy one them unless it came with a money back guarantee.

 

[buckbuck]

Unfortunately it sounds like either the fuel injector or ECU. ECU is $1000. Fuel injectors are $125. I don't recommend running that engine until you get things resolved. Also plan on changing the oil as it is rich with gasoline.

 

[andre d]

I'm having a similar problem with my '06 AR 230, I understand the injectors failing might also cause the ECU to fail. Anyone have the specs for the injectors handy?

 

[Murf'n'surf]

Ohm specs are listed in a pic in this thread.

https://jetboaters.net/threads/running-rich-max-rpm-8700ish-hard-to-start.7116/#post-123690

 

[bronze_10]

Switch the ecus between your engines if you verify that you have a bad one co snider sending it in to carmo for possible repair at a cost of about $300 otherwise buy a new one for $1,100ish. Some,times I see used ones online for $600 or so but I wouldn't buy one them unless it came with a money back guarantee.

Sorry to revive an old thread but it seems I may be in need of an ecu... @Ronnie what was it u mentioned about sending it in to somewhere to have it repaired?

 

[Scott griffith]

I had my injectors clean and tested when I sent my ecu off . Also try carmo they can repair them

 

[Beachbummer]

Did the injectors check out OK?

 

[bronze_10]

I had my injectors clean and tested when I sent my ecu off . Also try carmo they can repair them

where did u send your injectors?

 

[Scott griffith]

I don't remember the name but when I get home tonight I will look at the receipt and let you know

 

[2kwik4u]

where did u send your injectors?

I used to be big into rotary engined cars. For some reason Mazda couldn't make a "non-leaky" injector for a few years. There is a local place I always took my injectors. Name and contact is below. They would always flow, leak, and electrical test them for me for like $30/injector or something like that. Took them a batch of 10 once, and picked the 4 closest in flow to put into a car I was tuning. Worked like a champ and was one of the easiest tunes I've done.

Anywho, here's the place. I'm sure they would work with you on shipping them in, checking, and shipping back out. If they can't help, they might know someone who can.

Diesel Injection Services Co Inc
4710 Allmond Ave, Louisville, KY 40209
(877) 361-2531

Just occured to me......If they can help, but don't want to deal with shipping, shoot me a PM. You can ship them to me and I'll run them over at lunchtime one day. They're only about 5 miles from my office.

 

[bronze_10]

Thanks. I still have not even gone to look at the boat yet.. Lol.. I'm gonna start messing with it this evening some. If I don't have to keas with the injectors I'm not going to but if there is any indications its more than an ecu then I am gonna look into that as well. Pulling injectors is a little more iblnvolved than I am comfortable with. But I may have to learn!

 

[Murf'n'surf]

Thanks. I still have not even gone to look at the boat yet.. Lol.. I'm gonna start messing with it this evening some. If I don't have to keas with the injectors I'm not going to but if there is any indications its more than an ecu then I am gonna look into that as well. Pulling injectors is a little more iblnvolved than I am comfortable with. But I may have to learn!

Keep in mind that injectors that cause high resistance in the ECU will eventually kill the new ECU.

 

[2kwik4u]

Keep in mind that injectors that cause high resistance in the ECU will eventually kill the new ECU.

This is exactly correct. The driver circuitry in the ECU is typically somewhat sensitive to injector resistance in general.

I would expect that a resistance check across the field connections on the injector will tell the story you need before pulling them. I'm not aware of the values to look for on Yamaha's injectors exactly, but I think a service manual might have them. Also, pulling injectors is a pretty easy process.

Please keep in mind I have NOT dug through a Yamaha specific engine, I only have experience with automotive (mostly GM and Audi) injection systems. Everything I have seen so far puts Yamaha right in line with GM in terms of control theory and implementation, but I can't be 100% certain there.

 

[bronze_10]

Now I am going to have to research how to check the resistance of the injectors. I know injector one is where the problem is now.. Not sure if that is what was the cause..

 

[2kwik4u]

Now I am going to have to research how to check the resistance of the injectors. I know injector one is where the problem is now.. Not sure if that is what was the cause..

You should be able to leave it installed. Remove the connector. Measure resistance across the inputs. Record value and compare to acceptable value from service manual. Should be a quick and easy check.

 

[Jgorm]

I'll add to @2kwik4u statement that if you get an out of spec reading, try a different meter. I had one reading an ohm off. It was a $40+ meter, but my free hf and my $60 meter said it was wrong.