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2007 arctic cat 700 atv runs rich

2007 arctic cat 700 efi starts and runs fine when cold but misses and runs rich when warm. Will buck against the starter when warmed up and not start. Replaced battery, changed plug and set throttle position and idle

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 7 Answers

SOURCE: 85 trans am 305 mpfi rough idle at start

check your Temp sensor for the ecu. could be out of spec at lower temps but not enough to send a code "You know -40 is possible and won't send a code"

Posted on Nov 12, 2008

  • 275 Answers

SOURCE: hard to start and loping at idle

check the air filter and spark plugs and wires

Posted on Nov 12, 2008

txkjun
  • 409 Answers

SOURCE: 2000 silverado 4.8 v8 runs bad when it is cold out side.

Try replacing the coolant temperature sensor for the injection system.

Posted on Jan 11, 2009

  • 1 Answer

SOURCE: have to hit starter 2-3

When you say you have to "hit" the starter, do you mean literally? If so, then you need to replace your starter. I've had several cars where the starter went out and if you bang on the starter it will usually start up. That wouldn't have anything to do with your fuel pump or idle sensor. Replace your starter.

Posted on Feb 05, 2009

Tech jk
  • 102 Answers

SOURCE: heat

COOLANT LEAK.
The 3.5 and 3.9 V6 engine are having problems with the rear head gasket leaking. This low coolant level causes air pockets in the system, and no heat at idle.
TechJK

Posted on Apr 18, 2009

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1 Answer

2002 Arctic Cat 375 starts but won't continue to run?


Try running it with the choke partially on. Most Arctic Cats are jetted for higher altitude operation from the factory and need a larger main jet installed. Partially closing the choke will make it operate until you can get the carb rebuilt with a larger jet.

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Switch quad to awd and it starts to idle rough, and wont drive. Put it back to 2wd and it rides perfect, what could be the issue?


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Nov 30, 2011 - I have got a 2005 arctic cat 650v twin starts very good at idle good but when ... Each year varies and although some machines never change it would be ... A flooded ATV will be rough at idle and have a telltale smokey exhaust. .... with and without the 4x4 engaged it seems to be stuck in awd but the front left ..

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Jan 19, 2011 - 27 posts - ‎18 authors
I know, this isn't the ATV forum, but I'm hoping maybe one of the mechanical ... it is a bear , but when she starts I have to keep the throttle pressed.If I turn up the idle so she Idle's about 20 seconds later the Idle Is at about 2000 ...Missing: awd

Dec 25, 2015 | Cars & Trucks

1 Answer

When started cold and engines warming up the gas smoke and smell gas fumes


which engine, and year?
the engine is running way rich,
black smoke is very very rich .
its sick. get it serviced now.
lots of cause. do you want to do test or ask the blind for guessing.
????
The EFI engine can go rich for many reasons.
there are tests for each.
  1. check fuses
  2. scan the PCM first. got errors, they are REAL report them or read the FSM on what to do for each , its there. read it.
  3. fuel pressure way too high.
  4. ECT sensor wires fell off (scan it , and it tells you just that)
  5. leaking injectors (do a balance test)
  6. never tuned up this decade, so,, spark plugs ? replace them?
  7. Map sensor not working (vacuum to it missing, wires fell off)
  8. scan it driving , got more DTC errors. report them.
  9. FPR (fuel reg) bad. or vacuum to it missing. see #3

Apr 22, 2015 | Jeep Liberty Cars & Trucks

1 Answer

Truck dies after warm start


EFI or CARB
we need this fact.
if carb , and you did a tune up.?
then the carb has issues (99% dirty caused) oldest story on earth.
sound to me, the carb is running leak, hot, just like all old dirty carbs do.

Feb 26, 2014 | Toyota Cars & Trucks

3 Answers

97 Saturn sl2. Won't start after it gets warm. If you drive it for 15-20 minutes and try to restart it will not engage the starter. Wait a couple hours and it will start fine


It is your engine coolant temp sensor (ECTS). 99.9%. the saturn made them with a plastic tip, so they crack over time. A replacement should be about 15 bucks and not too hard to replace. You'll notice your engine temp gauge not working (always cold).

I don't know much about cars, but here's what happens. When your car is cold, the fuel runs rich. Your broken sensor is always reading that the engine is cold, but when it is warm, it runs too rich and floods your engine, not allowing it to start. When your engine is actually cold, everything is fine.

Mar 31, 2010 | 1997 Saturn SL

1 Answer

Hello. my 2000 4runner v6 has been running rough. when i start it, it runs fine untill it warms up. then it begins to miss. have replaced spark plugs, and battery but didn`t make a difference. diagnostic...


Change your oxygen sensors - they're responsible for feedback that the computer uses to determine the air/fuel mixture. They usually are good for about 60k miles and then start to go downhill. When they get to a point that the computer won't trust them, it ignores them and runs on preprogrammed fuel maps that run excessively rich (too much fuel) to safeguard the engine. You've probably seen a decrease in fuel mileage as well. And the O2 sensors have to be up around 900 degrees before they'll work - the car ignores them until then. That's why you run fine after a cold start but run rough once the car is warmed up.

The O2 sensors you want to change are in the exhaust system between the engine and catalytic converters (the "pre-cat" sensors). There are O2 sensors after the cats as well, but those are used comparatively to determine how well the cats are functioning. The primaries are the ones used for fuel mixture. If it's been this way for a few weeks or so, I'd put new spark plugs in as well - rich fuel conditions can foul them and contribute to the rough running.

Dec 09, 2009 | 2000 Toyota 4Runner

1 Answer

95 aerostar 4.0L EFI 109k --- OBD I, code #556


Might check the coolant sensor. Make sure it is reading correctly. If it is still reading cold on your coolant sensor it will tell the computer to run as if it were cold telling the computer to send more fuel when in fact it doesnt need any because the engine is already warmed up.

Sep 06, 2009 | 1995 Ford Aerostar

1 Answer

Running rough


replace the o2 censor

Mar 14, 2009 | 2001 Chrysler Sebring

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