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Codes 51/52. Acceleration problem.....

This is a discussion on Codes 51/52. Acceleration problem..... within the Engine and Drivetrain forums, part of the Technical category; My 08 Gen 2 started sputtering under hard acceleration, so I checked the codes and found 51/52/25. I serched and found lots of info on ...


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Old August 5th, 2010, 07:17 AM
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Codes 51/52. Acceleration problem.....

My 08 Gen 2 started sputtering under hard acceleration, so I checked the codes and found 51/52/25. I serched and found lots of info on fuel pump issues so I think that may be the issue, just trying to find a gauge to measure fuel pressure. It starts fine and does not fall on its face untill I hit the throttle to the floor. I looked at the wiring harness and checked around for grounding issues but found nothing. Gona order a fuel pump just incase......

Any other suggestions?

Thanks....
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  #2  
Old August 5th, 2010, 08:18 AM
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Re: Codes 51/52. Acceleration problem.....

You need a gage with a connector to attach to the schrader valve on the fuel rail.

I bought the master kit from Harbor Freight that has all kinds of attachments. Used it several times now for mine and other RZR's.

Good chance it is your pump. You want 39psi on the rail.

Just saw your from Canada. What do you have, Northern tool up there??? Harbor Freight of the North.
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Old August 19th, 2010, 07:54 PM
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Re: Codes 51/52. Acceleration problem.....

Finally had time to put the new fuel pump in, and test her out. NO CHANGE! It is still hesitating/popping upon hard accelleration around 4500rpm. I added more fuel with the controller and it did not seem to help much. Back to the drawing board I guess.

What other issues arise from the code 51/52. Do the injectors go bad?
Id hate to have to bring it to the dealer............. help please!
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Old August 19th, 2010, 08:19 PM
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Re: Codes 51/52. Acceleration problem.....

I'm not at the shop but i believe 51 and 52 is injector 1 & 2 short to ground or short to hot. Code 25 is temp. sensor short to ground or short to hot. Had a rzr give me these codes after a motor rebuild. Found it was a bad conection at the the solenoid. Be sure to check all major power conections hot and grounds. Hope this helps.
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Old August 19th, 2010, 09:15 PM
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Re: Codes 51/52. Acceleration problem.....

Had the same codes and it was a loose ground at the battery.
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Old August 22nd, 2010, 01:11 PM
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Re: Codes 51/52. Acceleration problem.....

Thanks for the replys.
I found the problem, the G3 DFR fuel controler! Figures...last thing I looked at.

Not sure why it is causing the problem, guess I'll call DFR and see if it can be fixed.

Cheers
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