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Old 08-07-2017, 10:20 AM
Flexx Flexx is offline
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2006 X2 - MCX - Enginge dies when shifting

Hey Guys,

i have a little issue with my MCX.

When the engine is cold, the idle is very rough (between 650 and 900 rpm), it often dies but starts directly.

As well, the engine dies when i put in a gear (no matter if forward or reverse).

Once the engine is warmed up, the problem is not that hard anymore. Idle is still a bit rough but engine runs okay in neutral.

Hope you can unterstand what im trying to say.

I gave it to the dealer but he says that this is normal - i dont think so because even my 97 Pro Star runs a lot better and the engine never died once.

Maybe PCV Valve or so?

Hope someone can make a poin... thanks!
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  #2  
Old 08-07-2017, 01:42 PM
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JohnnyB JohnnyB is online now
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1) Any fault codes set? Do a search on here on how to retrieve them.

2) How old are distributor cap, rotor, plugs and wires? If they are a couple hundred hours old, I'd start there....at minimum with cap and rotor, but while you're at it, why not all of it? Then, reset timing.
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  #3  
Old 08-07-2017, 01:59 PM
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mikeg205 mikeg205 is offline
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#1 check plug gap - and what johnny says above.
#2 check ignition pickup coil
#3 check ignition control module
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Old 08-07-2017, 02:55 PM
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CantRepeat CantRepeat is offline
 
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Quote:
Originally Posted by Flexx View Post
Hey Guys,

i have a little issue with my MCX.

When the engine is cold, the idle is very rough (between 650 and 900 rpm), it often dies but starts directly.

As well, the engine dies when i put in a gear (no matter if forward or reverse).

Once the engine is warmed up, the problem is not that hard anymore. Idle is still a bit rough but engine runs okay in neutral.

Hope you can unterstand what im trying to say.

I gave it to the dealer but he says that this is normal - i dont think so because even my 97 Pro Star runs a lot better and the engine never died once.

Maybe PCV Valve or so?

Hope someone can make a poin... thanks!
Dealer is wrong. This is absolutely not normal.

Did the dealer check for any fault codes?
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Old 08-07-2017, 05:21 PM
Cumminscj Cumminscj is offline
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When you change the spark plugs and wires please be sure to mark which plug came from which cylinder. On the off chance you have a leaky/weak injector this will be helpful to look at the spark plug and see which cylinder it came out of.
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  #6  
Old 08-08-2017, 12:17 AM
Flexx Flexx is offline
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Boat: Mastercraft X2 MCX 06
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Hey,

thank you very much for your response!

The MCX Engine is brand new, so all parts on it. The boat came with a broken Crusader and was changed by the dealer i bought it from to mcx.

I brought it to the Dealer and he checked for codes, he said it was a faulty "map" sensor - never heard this sensor before. He changed it and said the boat runs normal now.

But it doesent, same as before.

I will check for codes as said above, hope there is something.
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Old 08-08-2017, 04:24 PM
Cumminscj Cumminscj is offline
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Check the fuel pressure when you check for codes. It sounds like the motor runs well except for the idle problem and roughness. May also be worth putting a vacuum gauge on it. There good chance since the motor runs well there will not be any code set. In these cases it becomes important to pay attention to the value of each sensor and find the one that is slightly out of specification. This is much easier for the dealer to do with a computer but it can be done with a meter at home. For example if the throttle position sensor doesn't get below 2%(around 0.7volts). The idle air control won't work properly and you will have stalling issues.
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  #8  
Old 08-09-2017, 01:26 AM
Flexx Flexx is offline
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Originally Posted by Cumminscj View Post
Check the fuel pressure when you check for codes. It sounds like the motor runs well except for the idle problem and roughness.
Exactly this... the Motor runs great and is very strong and powerfull, except running in idle.
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  #9  
Old 08-09-2017, 01:29 AM
Flexx Flexx is offline
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This is the new MCX, is it possible to check for codes with the Paper-Clip method?
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  #10  
Old 08-14-2017, 09:54 PM
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gwozhog gwozhog is offline
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I would change up your iac. Cheep part that always fails.
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