sr20 dies on deceleration ONLY when hot

[msanchez]

So,
once the car reaches full operating temperature it will die on deceleration (coasting to a stop). If i blip the throttle to keep it from stalling, it shoots a thick cloud of white smoke out of the exhaust

However, when the car isnt up to normal operating temperature, it will drive and idle normally. I can push in the clutch and coast to a stop and the idle will hold steady at about 900ish.

So why am i getting so much fuel dumped into the motor on deceleration?
The car is running a little rich overall

Timing is right, tps is set to .35 (used a multimeter), fuel pressure is correct.
Help me out.

Stock maf, full turbo back 3inch, freddy intake, 264 cams, pbm midmount, brand new rebuild.

help me out!

[msanchez]

No one?

message length

[slothonaleash]

Does that white smoke smell sweet like burning coolant? If it were running too rich it'd be blowing black smoke.

If so, you may have a blown headgasket caused by over heating (or vice versa), which in turn is stalling you out when shit gets hot.

[msanchez]

its not coolant.
the radiator was tested for hydrocarbon. It was negative, so the hg is good.

[smoked240]

Is your BOV recirculated? I know on my Rb it did this exact same thing yours is besides the white smoke. If I was just sitting there, and pressed the gas and let off it would do the same thing,when hot. I recirculated it and it stopped.

[Pure_JDM]

When mine was giving me similar issues, it was a bad Coolant Temp Sensor. I'd check it out. It's only 12-14 bucks at any parts store.

[conrad_s13.5]

Is your BOV recirculated?
^ this,...and im guessing you have a oil catch can not properly set up....or the seals on the turbo are on there way out

[msanchez]

thanks for the replies guys.
1. No bov at all, so that isnt the problem.
2. My oil catch/pcv is set up properly.

PureJDM, was your car blowing smoke as well? The temp sensors were swtiched out with some off of a donor motor, whether they were working or not is unknown. But it didnt fix the problem.

I pulled my hotpipe and there are no signs of oil anywhere, is it worth pulling my downpipe and checking the exhaust side of the turbo?
thanks for the help.

[EDT007]

Vacuum leak? You can try spraying carb cleaner around the intake manifold/egr area to see if it does anything to your idle. If it does then you def. have a leak. Also I would change out the coolant sensor just to be safe. I had a similar issue with my 1g dsm and that's what it turned out to be. goodluck.

[zac 3ne2nr]

i had a thread on this, dies on deceleration and neutral decelaration. My issue was my TPS voltage, pinched wiring

[msanchez]

^Ive checked for vacuum leaks with carb cleaner, nothing. Plus that wouldnt explain the smoke or the problem only happening when its hot.
Tps has been checked and rechecked with a multimeter.
And both coolant temp sensors (ecu and gauge) have been changed.

Keep the ideas coming guys.

[XxIriponzeesxX]

has the engine ever been overheated that you know of? (don't know how long you've had the swap)

it seems like something swells when it gets hot. like the heads a little warped or something.

[msanchez]

head was decked. Its not a headgasket issue.