Weird Hesitating Between 3000/4000Rpm

[RamR33]

hi,once gain something new to my problem list lol

now im just about to drive and the engine is at cold temp. while driving taking the revs up to 3000/4000RPM its fine ,as soon as it starts to warm up say first line and a lil bit it starts to hesitate like can hear from the exhaust making a brrrr brrrr blocking sound between that rev range 3000/4000Rpm and then after 4000rpm goes.

When its fully warmed up never again.always seems to do it when going between from cold and normal running temp on my factory temp gauge.

just to add its under boost.

thinking maybe my ecu goes to coldstart or something or maybe my water temp sensor no good,not sure.

have posted a similar topic on the cold start issue when starting but now its almost like its following me on the road lol.

it just does it between that rev rang on that temp i mentioned....i seem to get the strangest problems lol

any ideas....

[SargeRX8]

You get the startup problem, now you have a cold state issue. Correct your water temp sensor. There are two. A single wire and a two wire one. Replace the two wire one.

[RamR33]

is it the one on top of the 1 wire one which goes to the head and clicks when reving the car? or another one?

[RamR33]

found it the one under the dash temp sensor.

thats a bitch to get to without taking off the radiator hose :@

is there any type of watertemp sensor from another car thats common that fits? as i might go to wreckers tomorrow.

[reeceo21]

I believe VL is the same but dont take my word on that i want one for my rb20