Srx 2001 Engine problem!! Dunno what to do :(

I would venture to guess its not a crank problem either, however a out of phase crank engine will not run at rpm and will be low on power and also have a noticeable vibration. I have never seen one go "boom" from being out of phase but it really doesnt sound like your problem.

I see you mentioned the dealer tell you to "check the wires under the motor", he was talking about the wiring harness under the motor, that is in plain view now that the engines out, if its not rubbed thru it will be sooner then later and will cause you more electrical issues then you could shake a stick at. Look at it real close and see if any one of the wires is rubbed thru the insulation, when they ground out from bouncing around on the trail the sled will do all kinds of goofy things, seen the tailight harness rub thru and case a sled to have problems. The hand warmers are sent the power from the cdi box, the cdi box gets its power from the staotr and triggered by the p/u coil, this is all in this harness i am talking about thats under the recoil when the engines in and by the coolant bottle and airbox. take out the airbox and check this harness out real,real close.

At the very least you can tape and insulate the harness in plastic automotive convolute tubing to keep it from happening in the future.
 

Hi guys!! thx again for the help


Well, i never said that i think its my crankshaft who cause the engine not to idle . I just said that now my engine is open, i did found that some bearings doenst seems to be ok. i don't think its what caused the performance to drop (8000 rpm max and no top speed) but i just don't want to put back this crankshaft b in the sled if the bearing are not good..

For the handwarmer, my dealer don't have any idea of the problem. they just tell me to check the wire under the engine and if its doesnt solve the problem, maybe change the regulator or the cdi box! !


Your recommendations is too look closely to find something wrong with all the wires, connections etc. Its what i will do...
 
I had the same issues on my SRX. The wiring harness under the motor had a few bare spots on it and was making it act very goofy. One day it would run great, the next it would bog and die. Over the coarse of a month it got worse and worse untill it wouldn't run anymore. Fixed the wires and haven't had a problem since.
 
Well, the crankshaft Shop did call me on i have to pay 75$ for the job !! THey did re-align the crankshaft. Its why the bearing not moving freely.. I'M suprise. I was thinking i'll have to pay 400 500$ lol!!

One problem solved. Now, need to find the electrical problem. Stay tune!
 
the wiring harness that can cause these problems is the one that connects to the headlight and gauges, it runs under the motor. Under the motor is where you may find that 1 or more wires have some damage or rub-through.
If you find this on your sled the wires can be fixed...tape them up good and you may want to put the harness in a wire loom to protec them from furthur dammage. Keep us posted on your progress.
 
yamyrider said:
the wiring harness that can cause these problems is the one that connects to the headlight and gauges, it runs under the motor. Under the motor is where you may find that 1 or more wires have some damage or rub-through.
If you find this on your sled the wires can be fixed...tape them up good and you may want to put the harness in a wire loom to protec them from furthur dammage. Keep us posted on your progress.
Click to expand...

This topic has been beaten to death so bad cuz it happens all the time. I can't believe yamaha didnt put out a tech bulletin on it, i have done this to so many sleds it isn't funny.
 
yup unplug the harness from everything in your hood and gently pull out from under the engine. being careful not to have it hang up on anything and pull slow you can damage the wiring by pulling to fast.
 
Hi people.. i did check all the wires, stator impedance, continuity between the CDI and the stator, handwarmer resistors etc etc and didnt find any problem!! Well i'm thinking to try another CDI.. We will put back the engine in the sled and see if the problem is still there.. stay tune
 
You guys make this harder then it needs to be.

If you have no spark you start looking for power from the start to the end, in this case the stator is the start, the spark plugs is the end!! the stator is where the power comes from, so do you have power coming from the stator output wires??

next thing would be from the stator output to the cdi box input wire, is there power here when you pull the sled over?

next, is there power coming out of the cdi box wire to the coilpack?

next is there power coming into the coilwires thru to the spark plug?
 
Yes, but mine didn't show any problems untill it got jiggled just right on the trail and the wires made contact, by the time I hauled it home to check everything out it got jiggled back to having no problem!! This confused me untill the short got bad enough that it was constantly bad.

Sorry for all the jiggling
 
mrviper700 said:
You guys make this harder then it needs to be.

If you have no spark you start looking for power from the start to the end, in this case the stator is the start, the spark plugs is the end!! the stator is where the power comes from, so do you have power coming from the stator output wires??

next thing would be from the stator output to the cdi box input wire, is there power here when you pull the sled over?

next, is there power coming out of the cdi box wire to the coilpack?

next is there power coming into the coilwires thru to the spark plug?
Click to expand...


i have fire on all three sparkplugs!! i never said that i have no fire. But the engine doenst run ok.. the sled can't move, no power. It act like if i was running on 1 cylinder. Its the best i can describe it.. Now i know its not engine/carb/clutch/powervalve related. it something electrical for sure..
 
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Check exhaust out

When you got it going did you notice how the exhaust is flowing...Make sure there is no blocked off exhaust, check to see if your p.valves are cycling...
 
You need to give more information about how it runs when you're trying to move it. Does it idle perfectly? When I have a dead plug, I just idle it and take a spark plug cap off one at a time (carefully, and with gloves and pliers that won't hurt the cap) listening to see if the engine dies down a little when that plug is unplugged and revs back up when its plugged back in. I'm pretty sure CDI's either work or they don't. I had one die and BAM no spark at all. Is it responsive when the belt is off? Being very careful doing this, need to hit the kill switch if it revs too high. I'm sure you are running on just two cylinders, you just need to find out why and which one isn't firing. I don't mean spark at the plug, I mean everything isnt happening in that cylinder. Air intake, fuel intake, exhaust, or spark at the right time.
 
Also, the exhaust point is very good that THEBLUES made. I squeezed off the end of one of my pipe outlets on the trail completely shut and it was acting like a plug was gone.
 
hi everybody!! Well, my friend did put back the engine in the sled and by accident, did discover 2 wires that were completely strip and short on the frame.. I didnt see it myself. I said it was the wire coming from the engine?? Anyway, i did inspect myself the wires in the sled and didnt find anything wrong


SO, we did start the sled.. and.... it work now.. BUT i dont know yet if the performance problem i had is solved.. I will know at the first ride.. And the handwarmer still doenst warm like it should be.. I'm sure its a cdi related problem!!

By the way, the engine is A1.. the crank is A1, ,so, if i still have some performance problem, i will be sure its not engine related..
 
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