[tawd77]

My 09 RZR 800 has some issues when starting. Usually, when the engine is cold, you crank the engine, and it will start, and usually cough out of the intake a couple times then die. If you restart it, it will usually run great, and have no issues. Usually just the first, cold start.

Today I noticed it did the same thing, but once it was warm, if I shut it off, it would ocassionally Cough throught he intake every once in a while at an idle. I recently took off the throttle body, and cold air intake off and cleaned them. Im not sure if this would have caused anything.

Anyhow, what can make this thing keep coughing through the throttle body? Would that be bad plugs, or? Thank you for any help you can provide!

 

[johnnycat8]

ck your fuel presure this is how some start when its going out....

 

[tawd77]

Is there a fuel pressure test port on the fuel line somewhere? If not, how do I check it? What is the recommended pressure? Thanks

 

[birdmanf250]

On top of valve cover... Therenis a schrader valve (valve stem type fitting) u cam hook up there and test pressure with a fuel pressure kit.

U want 39 psi

Airtex E-8335

Mine did same thing... Changed pump couple weeks ago and runs like a champ!
PS. Read the changing the fuel pump sticky thread! It's a major helpful thread!

 

[tawd77]

On top of valve cover... Therenis a schrader valve (valve stem type fitting) u cam hook up there and test pressure with a fuel pressure kit.

U want 39 psi

Airtex E-8335

Mine did same thing... Changed pump couple weeks ago and runs like a champ!
PS. Read the changing the fuel pump sticky thread! It's a major helpful thread!

Thanks for the help. I will check the pressure tonight.

 

[Johnpeq]

I know this sounds crazy, but I have found that if I turn on the key and pause for about 5 seconds (I have let the wrench icon expire so it blinks for a few seconds) then start the engine, all my past engine issues have gone away,
John

 

[rzrman54]

My first pump started with hard starting then no power. Changed #2 pump started out easy starting and power is back great. BUT this weekend no top end power again in the dunes. Going to put a gauge on it and go run it hard to see if the pressure drops at the top end pressure at idle is 42psi. It starts out running hard but in a 1/4 of a mile the rpm starts to drop and slows down. I think pump #2 is going out I change it two weeks ago if so no more Polaris pumps.

 

[tawd77]

My first pump started with hard starting then no power. Changed #2 pump started out easy starting and power is back great. BUT this weekend no top end power again in the dunes. Going to put a gauge on it and go run it hard to see if the pressure drops at the top end pressure at idle is 42psi. It starts out running hard but in a 1/4 of a mile the rpm starts to drop and slows down. I think pump #2 is going out I change it two weeks ago if so no more Polaris pumps.

Ok, I checked the fuel pressure at the fitting on top of the gas tank, and with just turning the key on, and not running im getting 25psi from the pump. Its suppose to have 39psi even when not running, correct?

So, what regulates the pressure? Is there a regulator built into the pump, or in the sending unit assembly, or? I want to make sure its my pump, and not the regulator that causing my low pressure. Thanks!!

****UPDATE****
I hooked up the test gauge at the fuel rail, and had aroudn 25psi not running. Started it up, and it died once, restarted and it idled good, and has about 37psi while running... So, is anything wrong with it??

 

[birdmanf250]

Yes 39psi not running as well... There is a regulator on pump assembly...
Could be trash clogging filter up... But more than likely pump going bad.

 

[tawd77]

Yes 39psi not running as well... There is a regulator on pump assembly...
Could be trash clogging filter up... But more than likely pump going bad.

Ok thanks. I guess I will take the pump out tomorrow and check it out.