Engine doen't like over 95 degree ambient Temp.

[TURBO200R4]

Engine runs great at 90 degree and below ambient temp., when the weather gets hotter the engine doesn't like to run it surges. When the weather is cooler and the bike cools off it runs like a champ. It's an 05, just wonder if it could be some kind of sensor, it throws no codes. Like I said if I shut the bike off and start it the next morning there's no problems, only when it over 90 outside. It's not the gas as I've already thought of that and used other top tier stations with same results.

u need to tell us about your bike
is it set up with original filter under seat?
k&n's or other.
where is the air temperature sender is it still in the bottom of the air box? if it is laying on the head or back of motor u need to fix
have u installed a tune?
do u have tune ecu?
is it going into closed loop with o2 sensor changing?

 

[FTL40]

u need to tell us about your bike
is it set up with original filter under seat?
k&n's or other.
where is the air temperature sender is it still in the bottom of the air box? if it is laying on the head or back of motor u need to fix
have u installed a tune?
do u have tune ecu?
is it going into closed loop with o2 sensor changing?

Original air filter under seat, only mod is thunderbike pipes cat delete. I do have tune ecu. The air temp sender is still where it was installed since new.

 

[atomsplitter]

I'm curious if your throttle body sync is off. That's an easy check. That would explain low speed surge. Just a thought.

 

[TURBO200R4]

Check vacuum hoses and rubber caps at throttle bodies and map sensor.
Check air temp. sensor/connector. for dirt or corosion at connector
I have never tried this
Might disconect air temp sensor the ecu should set a default setting (and will set code) and might tell u if it is good or bad.

 

[CrzystghndKC]

Check vacuum hoses and rubber caps at throttle bodies and map sensor.
Check air temp. sensor/connector. for dirt or corosion at connector
I have never tried this
Might disconect air temp sensor the ecu should set a default setting (and will set code) and might tell u if it is good or bad.

Being careful with the sensor as there is a tiny glass bulb that protrudes from the front. Even though it looks like it should screw out it does not. It's just a push in pull out fitting. It looks like this.

 

[vindex1963]

Check vacuum hoses and rubber caps at throttle bodies and map sensor.
Check air temp. sensor/connector. for dirt or corosion at connector
I have never tried this
Might disconect air temp sensor the ecu should set a default setting (and will set code) and might tell u if it is good or bad.

That's an important one, I replaced mine and they were rock hard.

 

[TURBO200R4]

That's an important one, I replaced mine and they were rock hard.

I think mine r giving me a problem if i get some tim to check them out.

 

[FTL40]

I'm curious if your throttle body sync is off. That's an easy check. That would explain low speed surge. Just a thought.

All in sync, runs super till the outside temp.gets in the mid to high 90's.

 

[atomsplitter]

All in sync, runs super till the outside temp.gets in the mid to high 90's.

Then it may be your Mass Air Flow Sensor. That thingy in the air duct plumbing that reads temperature and inputs to the ECM.

 

[FTL40]

Then it may be your Mass Air Flow Sensor. That thingy in the air duct plumbing that reads temperature and inputs to the

Then it may be your Mass Air Flow Sensor. That thingy in the air duct plumbing that reads temperature and inputs to the ECM.

I'll give it a check, funny it only acts up in the high 90's