[28chevyguy]

anyone ever bought injectors off ebay? got a set of 8 for 50 bucks … really cheap .   Got them today, they actually have bosch part numbers on them but the box says china??

I have a high hp Pontiac grand prix turbo retuned with 36lb injectors , they were used but professionally cleaned before installed with the tune , the car ran amazing but now years later is making white fuely  smoke and the car is running pig rich 10:1 !!!!
fuel regulator was tested and seems to work fine, im leaning towards a mechanical malfunction within the injector (s).
as if one of them is sticking open ,  being Multiport rather than series injection , that doesnt help much either!

So i bought these new injectors but im kind of weary installing them with the china logo on the box   i was reading the china injectors dont have the bosch numbers on them but these ones do ...  i really dont know what to think about them . 
The only thing keeping me from driving the car is this white smoke so i really need to get it figured out ,, its not oil smoke or coolant.

[EDNY]

Have you tried a laser temperature gauge on the exhaust header to determine if all eight are approx at the same temp?

[28chevyguy]

no i don't have one of those, should grab one as they are great tools for tuning.  I have custom log manifolds anyway , im actually cracking the upper intake off right now .  going to get a quick ohm count on them first


so i have 11.5-11.6 across the board, going to try to watch the spray pattern now... another dam gremlin

EDIT    FIXED ....got off easy this time ,  just tossed them in and no more smoke.  will see how they hold up under boost .

[chopper526]

Sounds like an easy fix. You bought them, might as well try them

[28chevyguy]

yea there was no mention of china but I should have known... dam china logo was big on the box too hahaha freaked me out

[39delux]

From what I've read about injectors they seldom fail but they do get clogged and gummed up.  Sending them out for cleaning/flow check gets expensive (over $20 EACH).  There are several DIY videos on how to clean them at home.  Good advice to use a heat gun on the headers which may give you lots more info.  Have you checked the O2 sensors?

[28chevyguy]

Yea the last  set was sent out but they were abused for about 5 years over all … hard boost takes a toll. 

The car is perfect now all fixed ,  air fuel ratio at idle went from 10:1  back up to normal approx. 13:1  maybe a little higher than that.

[madmike3434]

I use STP or another brand of FUEL INJECTION CLEANER right in the tank every 4 tanks.  They used to have tv commercials by STP showing a fine mist spray instead of semi clogged stream.

Convinced me.  Never had an injector taken out to have serviced .  And I keep my cars until the end.

mike

[28chevyguy]

yes I agree with cleaning them but in my case one had a mechanical malfunction , over fueling … the opposite of being clogged.  You can ohm them and keep em clean as you want , if they mechanically fail … it will need rebuild or replace.