Any ideas? Plugs fouled after 2 minutes

[shawnc16]

Guys, I don't think he got bigger injectors, he just got his cleaned and matched.

We already know that. But going from a 28 injector to a 30lb 3 bar probably around 36lb at 4 bar (4 bar is base FP) will cause major problems if they haven't been scaled with programming software

[kammi10]

i thought he said he had 30's in there. arnt stock like 26's or 28's?

[1bad83ta]

Guys, I don't think he got bigger injectors, he just got his cleaned and matched.

[kammi10]

This might be a dumb question but, has it been tuned for your bigger injectors?

was just gonna ask the same thing.. is it still a stock tune on the pcm? if so with the bigger injectors thats not good and could explain the problem very easily

[shawnc16]

This might be a dumb question but, has it been tuned for your bigger injectors?

[OIF1VET]

If you're still having problems I can probably swing by Friday to have a look.

That would be awesome Vinnie.. I will PM you my number.. I am going to tear it back down and put fresh gaskets on and double check everything...

Hmm, well maybe the direction I was going is wrong, I was assuming there was a larger difference between the before and after, therefore you would be dumping significantly more fuel in than the car was tuned for, but that doesn't appear to be the case here.

Yeah, I am at a loss.. I pulled the TB off and there was fuel in the intake...

[sman]

Hmm, well maybe the direction I was going is wrong, I was assuming there was a larger difference between the before and after, therefore you would be dumping significantly more fuel in than the car was tuned for, but that doesn't appear to be the case here.

[Fbomb]

If you're still having problems I can probably swing by Friday to have a look.

[OIF1VET]

They are all flow matched to each other. As a group are they flowing more now then before?

Yes.. Here are the before and after results...
http://www.mifbody.com/vbulletin/sho...jector-results..

I was, also, told this by someone last night.. And found this response on Tech to another guy having issues.. But I would think since the 30# SVO's have always been in the car they should still be ok, even if they flow a little more now.. Thoughts..

PUT YOUR STOCK INJECTORS BACK ON NOW!!!! If I was upgrading injectors unless they were free I would not go from a 26 to a 28 GM. Your not getting much. Now getting some 30Lb red tops is a mod. The red tops flow about 36lbs at our fuel pressure.

[sman]

They are all flow matched to each other. As a group are they flowing more now then before?

[OIF1VET]

You had your injectors clean so they flow better(read more) now right? Has the car been re tuned since?

It would be like putting bigger injectors in and not having it re tuned.

Yes, they were just cleaned and flow matched to within 2%.. and they are 30# SVO injectors..

[sman]

You had your injectors clean so they flow better(read more) now right? Has the car been re tuned since?

It would be like putting bigger injectors in and not having it re tuned.

[shawnc16]

The likely hood if it being leaking intake gaskets is slim. vacuum leaks also cause a lean condition and high idle unless the engine can compensate. You have other issues. You seemed to have ruled out the MAF. Do you have a wideband O2? If the car only ran for a few minutes its in open loop.

[OIF1VET]

All of your plugs look that way?

yes

[shawnc16]

All of your plugs look that way?