why wont i go to boost when its hot

[toledo240]

Hey guys I just moved down to columbus which is a bigger town for me. traffic is crazy around here. well my problem with my sr is that it doesn't like to go when its hot outside. It does this when im in stop go situations in trafficIt doesn't over heat, it just wont accelerate and i go into boost leak, the car doesn't like to go anywhere unless im reving around 3000 rpms, and the more i run it the worse the acceration is. revving is fine it just wont go after going in stop go situations after so many times.im running stock smic, and stock radiator, im runing 10 psi but havent got a chance to really spool it up for a long time. i have silicone couplings on the hotpipe but not on the cold, all of the couplings are tight. and oil 15w50.what can it be?

[912.0turbo]

Slipping clutch maybe?Kinda hard to understand what your saying.

[Luke]

I've got the same problem, on the same setup and oil, except with a greddy fmic and 14 psi. The gap on my iridiums were off (.28, .20, .21, .21) or something weird like that. I regapped them to .28 and it helped a good bit. I set the timing correctly also.

It sucks though because it loses its power after running a while, running hard or not.

[SoCalS14]

Maybe your getting use to the power...haha...I have that problem too...The only cure is too add more mods.

[Luke]

Maybe your getting use to the power...haha...I have that problem too...The only cure is too add more mods.

I bet it is half that, such a vicious cycle.. It does lose some punch though.

[chickentendah]

I had trouble understanding what you were talking about.Maybe the 15w30 is too "thick", even in your hot climate? I don't know. There might be an oil expert in here.

[got2b240]

Maybe your getting use to the power...haha...I have that problem too...The only cure is too add more mods.

dude your soo right about that!!! I have the same problem!

[toledo240]

that might be it. it used to do it it when i ran 10x30 but not as bad. anyone else know. it ran all day yesterday great, but it was under 75 degrees with no humidity and it was cloudy

[Nismo_Freak]

You should be running 15w50 syn. oil in that thing. On top of that you need to really watch how much you beat on the car with warm ambients and the stock sidemount. It will heatsoak fast.

Some things you could do to improve it:

1. Make a duct from a bumper opening to the intercooler. 2. Run 15w50 Oil 3. Reduce the boost pressure

[ColumbusDrift]

i am running 15w50 i took off the booost and went down to stock 7psi again and there already is a duct for the intercooler.i drove all day, and it didn't do it but when i tried to really step on it the car would shake horribly.could it be my o2 sensor or mafs?

[Nismo_Freak]

MAFS, TPS ... check both.

[toledo240]

you think it could be my o2 sensor?

[Nismo_Freak]

you think it could be my o2 sensor?

No, 02's only come into play with partial throttle cruising.

[toledo240]

am i i right when i say that the sr20det and the sohc mafs are the same right? no wire modification?

[NY S13 SR]

If the ECU temp sensor is not working right the engine will be hard to start cold and you can lose power when the engine is hot due to the ECU timing retard.

Bucking under hard acceleration is usually a boost leak. Check for loose couplings, leaking BOV, intercooler core damage/leaks. This is the most common SR problem by far.

If you can run rpm's all the way up to 5000+ under partial throttle, it is probably not the MAF.

__________________Jeff Hheavythrottle.com

[toledo240]

revs all the way up. so not mafs. ecu temp ensor never heard of it? but it starts perfect when its cold. its not that i even have to even accerate hard. coming out of first gear from complete stop seems to be my problem. it feels that im riding the clutch when i give it gas. when im not at all. usually will not acclerate until around 2500 rpms and hit about 3-5psi of boost. and then gradually work up to 3000 rpms coming out of 1st gear and then will never catch boost at all

[NY S13 SR]

Sounds more and more like a boost leak. Watch your rpm and boost, if the problem happens no matter what rpm you are at and whenever you go over X psi, then it is a leak.

__________________Jeff Hheavythrottle.com

[Gladius]

I'd have to say boost leak. I know one time I was driving around on a hot day and hitting about 15 psi sometimes. As the car got hotter my coupling on my intercooler would leak a little and at about 10psi the car would fall on its face. I boosted a couple more times then my intercooler pipe popped off.

So I'd say check/tighten your connections. You may have to take them off and reposition them to seal better.

[toledo240]

well guys today it happened again while i cruised around ohio state today. There has always been a little squeal coming from my clutch when it come out of 1st gear whenits cold and when i down shift hard or when i ride the clutch. well today as i was losing boost that squell would happen when i wouldn't even switch gears! it did it everytime i gave it gas. i think my transmission gears are slipping it kinda makes sense. losing boost when the gears dont catch right. can heat effect the transmission

[toledo240]

still have not figured it out? anyone else

[fantabulous]

perhaps the sensing element is dirty in your maf, or plugged. get electronics safe cleaner and spray it. i used endust. helped a lil bit. good luck.