Another 2001 GTX DI... sorry

[CTSeaDoo]

Hello everyone, this is an amazing forum, I have been reading so much over the last few months and then decided to ask...

I have a 2001 GTX DI, 128 hours (20 on new engine). I purchased it last month and I am having issues - surprise!

It will rev once over 6000RPM and then miss, at full throttle it will miss, fall back in limp mode at 4700RPM and stay there happily. if you let it rest at idle, it will again rev higher and then backup. The red light and Maint will flash when it backs up to limp mode. As long as you go back to idle and keep the throttle at 1/3 to 1/2 it will happily go 5000-5200RPM, more throttle causes the above issue.

Now here's the rundown:
130PSI compression on both cylinders
Fuel pressure - check (but I still put in new pump and filters)
Air pressure - check
Fuel injectors - cleaned and tested
Air injectors - cleaned and tested
Voltage - 13.6V max - new rectifier anyway
New knock sensor
New coils
New wires
Checked and fixed ground in the electrical box (behind the coils)
New spark plugs
Runs 93 octane gas - emptied tank and cleaned
Runs XPS2 - emptied tank and cleaned
Cleaned Rave valves, they were soaked in black sticky oil - verified that they work fine and so does the air pressure control solenoid
Tested water control valve on exhaust, works as expected
New battery - AGM
Tested all sensors per service manual at the AMP connector, all OK
All fuses OK but replaced and applied dielectric

Any other suggestion? Waiting for dealer to hook up BUDS in two weeks but getting impatient

 

[CTSeaDoo]

And... spark plug color, perfect light tan, not lean. However when it misses and skips it smokes a lot, it could be because it's not burning the gas/oil but... I also checked the oil pump, it is NOT stuck open.

 

[mikidymac]

What fuel pump did you use as a replacement? Almost all the aftermarket ones don't provide the required pressure even New out of the box.

 

[CTSeaDoo]

Factory OEM

 

[jhjesse]

Fuel pressure will not throw a code. Electrical issues throw codes, so we can rule that out. Need to get the code(s) read.
When reading the codes make sure they check the tps readings. They could be out of range or the air temp sensor on the throttle body could be malfunctioning, but one can only guess until codes are read.

While you are in there might check the reeds and make sure they are not curled up on the ends.

 

[CTSeaDoo]

I just ordered a Candoo... let's see

 

[CTSeaDoo]

Tested the air temp sensor, that read OK. Couldn't test in details the TPS nor the MAP sensor (via resistance testing). What sounds odd is that it feels as it cuts the ignition and that is why it misses.

 

[CTSeaDoo]

On a side note, I also changed the carbon seal... MAN is it hard to compress the bellows!!! It had a small leak as it was cracked in 3 pieces

 

[jhjesse]

Tested the air temp sensor, that read OK. Couldn't test in details the TPS nor the MAP sensor (via resistance testing). What sounds odd is that it feels as it cuts the ignition and that is why it misses.

Hmm...might check the dess post for a loose wire. Could also check the pin connections on the plug for the crank position sensor.
Had one act like it died the other day. Went down to an idle, then just stopped. Pulled the lanyard and re installed...one beep. Pulled the lanyard off and cleaned it with my shirt tail, viola it worked.

 

[CTSeaDoo]

Sooo... I got a Candoo Pro and it tells me that I have an issue with the Crankshaft Position sensor. Any tips?
Can it be swapped without pulling the motor out? Besides teh Exhaust gaskets, what else will I need to order with the sensor (gaskets etc). Thank you sooo very much ;-) Charles

 

[jhjesse]

I would test the pin connection first and make sure all the pins are not corroded or bent over and in fact making a good connection.
You might be able to get it without pulling the engine but doubtful. If you attempt it make sure you put a board under the engine for support before removing the mag cover and front engine support.

PS. Be very careful of the case cooler hose nipple. It breaks off easy.

 

[CTSeaDoo]

Does anyone know what it would cost me to have a dealer do it?

 

[CTSeaDoo]

On the corrosion part, is it likely in the wiring connector or the connector in the magneto crankcase? Thanks again!

 

[CTSeaDoo]

Dealer -> 2.5 hours plus parts, $275 part is $160

 

[jhjesse]

Dealer -> 2.5 hours plus parts, $275 part is $160

If they can do it in 2.5hrs let them do it, but I have my doubts. It would take me 4 to 6hrs. Lol

 

[CTSeaDoo]

They replaced the CPS and encoding wheel, 2.5 hours... error remains... 0335 Wrong pattern sensed

 

[tkarvelis]

[MENTION=20888]jhjesse[/MENTION], If I remember correctly, didn't BRP use two different encoders on their engine? Is it possible the the PO who rebuilt the engine swapped engines from an 03 and did not swap the MPEM? It would make sense based on the 0335 Wrong pattern sensed error.

 

[jhjesse]

Yes, if the encoder wheel is 2002 and up it will not work very well on the 2000 & 2001 models as BRP had to conform to emissions standards and made changes in firing time, air injectors, cylinder head etc.

2000 & 2001 - pn: 290966820
2002 - pn: 290966822
2003 & up - pn: 420966822
Might make sure the dealer installed the correct wheel.

 

[gnmdavis]

They replaced the CPS and encoding wheel, 2.5 hours... error remains... 0335 Wrong pattern sensed

no sure if this helps, but by 2001 di had same code after new engine install.
had to rebuild original crank and put into new engine--computer learns original crank position at factory. My understanding is that the key way on flywheel can be vey slightly different clock from engine to engine