jintei

iTrader: (23)

Hi guys,

I was wondering if anyone can help me pinpoint the problem that happened to my car recently.
The car drives just fine and idles fine. I had the spark plugs, rotors, caps, wires, cat replaced not too long ago. I also had the timing fixed.

Lately I noticed that the car is not as powerful as it's used to be. It throws a check engine light every now and then but then it disappears after a couple minutes. The engine also squeeks a little on a certain rpm. The most depressing part is the intermittent "early shifts".

I also noticed that there's this white residue stuff on the engine:


I'm not sure if this residue has anything to do with the loss of power.

I have checked for vacuum leaks but I couldn't find any. All hoses & connections are tightly secured, fluid level is normal, everything looks fine.

Any ideas? Thanks for the input.

-David

300ZXSC300

Where in CA are you at? If you are close to me, I can check it out for you for free. You just have to swing by the shop.

jintei

iTrader: (23)

Hi, thanks for the reply.
I live in westminster and I work in Irvine.
let me know where your shop is located.

xspsi6

iTrader: (31)

That appears to be coolant as your rubber hose to metal pipe connection shows a good bit of corrosion so I would look there and replace the rubber hose along with a possible coolant flush.

k7q

iTrader: (37)

CEL going on and off. might be EGR clogged. that's what happen to mines when i checked the CEL.

CLOGGED EGR


CLEANED EGR


your hose might be crusty and old. might be the reason its leaking.

StiCk3

iTrader: (5)

As far as power losses, have you been able to check your CEL and see if any history codes are stored? could be a good place to start as something might be holding you back.

For the residue, that looks like one of the coolant hoses going to your IAC. It could cause problems as the coolant might leak into the spark plug valley and seep into a cylinder or two. A new hose and coolant bleed should fix that.