SRX Won't Idle Properly.

YamiSmurf

YamiSmurf

New member
Joined
Jan 31, 2004
Messages
373
Age
54
Location
Mishawaka, IN
Hey everyone, I rode with a friend yesterday. His 02 srx started and ran just fine for our first 12 or so miles only to idle poorly when we came to a stop. You would have to apply gas to keep it running. We replaced the plugs and it idled exactly the same way but started to backfire. We reinstalled the old plugs with the same idle issues without backfiring. Once the sled's rpms are above 3000, it runs flawlessly. DCS did not flash. We also put some isopropyl in the gas with no luck. Carbs were cleaned prior to the season's start. Any ideas.

Thanks

YS
 

The plugged pilot jets lean out the fuel mixture on the pilot circuit. This is the fuel mixture the engine needs to idle properly.

Once you are on the gas just a bit the fuel is pulled through the main jet. It is probably clear so the engine will run just fine.

Chocolate brown indicates a lean fuel mixture your flirting with disaster.

A word of caution: Be careful when you pull the air screws out. Sometimes the rubber o-ring and spring will get stuck in the carb. Once you start spraying the carb cleaner it can blow the o-ring and spring out. I learned the hard way but luckily I found it. I spent about 30 minutes on my hands and knees looking for it!
 
Last edited:
mcclan said:
The plugged pilot jets lean out the fuel mixture on the pilot circuit. This is the fuel mixture the engine needs to idle properly.

Once you are on the gas just a bit the fuel is pulled through the main jet.

Chocolate brown indicates a lean fuel mixture your flirting with disaster.
Click to expand...

actually the mains dont take over until around 3/4 throttle, between the pilots and mains is the needle jets. All circuits overlap some as well, bigger pilots will richen the whole mixture some, etc
 
Thanks gang, I know we cleaned the main jet and the one that's recessed into the carb next to the main jet, but not aware of the needle jet. Could someone elaborate on the needle jet as to its location etc. Oops.

YS
 
mcclan said:
A word of caution: Be careful when you pull the air screws out. Sometimes the rubber o-ring and spring will get stuck in the carb. Once you start spraying the carb cleaner it can blow the o-ring and spring out. I learned the hard way but luckily I found it. I spent about 30 minutes on my hands and knees looking for it!
Click to expand...

What air screws? These carbs DO NOT HAVE airscrews. The screws on the engine side of the floatbowls are FUEL SCREWS.
 
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