popping at wot

[Ryda85]

my buddy has a ty that just had a tune up about 6-7 months ago...ran great....now in colder weather he can't go WOT because it sounds like it starts popping / backfiring. what would cause this? i told him to come sign up for the boards...maybe he will chime in

 

[SY756]

Re: popping at wot

If the cold weather is the only change maybe it's starting to run lean, causing the popping. Just want to make sure that it's not detonating if it is running lean.

 

[turbodig]

Re: popping at wot

my buddy has a ty that just had a tune up about 6-7 months ago...ran great....now in colder weather he can't go WOT because it sounds like it starts popping / backfiring. what would cause this? i told him to come sign up for the boards...maybe he will chime in

Likely the overboost cutoff. Try taking 1 turn out of the WG rod.

Don't discount the ignition, either. I've seen "new" tuneups last less than 3 months.
Particularly if they installed whiz-bang wires or super-duper multi-terminal platinum plugs.

 

[GM TURBO]

Re: popping at wot

I'd say overboost.

 

[attackdog]

Re: popping at wot

I'd say overboost.

X3... or running lean like mentioned earlier. I had this problem a few days ago because I didn't have enough fuel in the tank. I filled the tank and got on it again with no problems. Make sure he has at least a half a tank of gas before getting on it in the cold weather.
-Dean