Weird Idle after turbo install

[Jebadoo]

Well here I am with another dumb issue:

After I got everything wired up (Hardwired CPS, Hardwired O2) Checked all connections, INSTALLED BRAKE MASTER CYLINDER.... I have a weird idle issue. Cold start car sounds beautiful, idle correct, no stumbles. As it warms up in begins to idle between 500-600 rpm and surges hard..... corrects for a few seconds then starts again.

Also, as I drive it, it stumbles up the RPM range until I reach 0 vacuum then the boost kicks in twice. like two power surges....... Any thoughts?

 

[Jebadoo]

Wouldn't a bad AFM throw a code? Massive vacuum leak?

 

[Compton74]

check the codes nonetheless

 

[Jebadoo]

That's the issue, it's showing no codes

 

[Jebadoo]

Well, here's an update:

Unplugged the AFM and it idles amazing........ SO stupid me attempted to clean it and now I get a code 31..... Idles amazing.... but got a code..... Bad AFM I'm assuming?

 

[Jebadoo]

Anyone?

 

[Backlash2032]

If you cleaned it you probably killed it.

Sent from my HTC Rezound using Tapatalk 2

 

[Jebadoo]

Would a bad AFM cause weird idle issues and driveability issues without throwing a code?

I mean, now no matter what I need new electronics which are on their way, but do you think that's what the issue may be?

 

[Jebadoo]

Well, put different electronics in my housing, starts right up, no codes.... When it begins to warm up, it begins idling rough again.... I blip the throttle and almost instantly get a code 31 again and idles fine......

This is driving me crazy, any thoughts???

 

[Jebadoo]

Wiring? Idk what to check for anymore, driving me crazy, would incorrecT intake plumbing cause it?

 

[airhead04]

check for leaks.

 

[airhead04]

Also....READ:

http://www.supramania.com/forums/showthread.php?158538-Bad-AFM-electronics-or-something-else

 

[Jebadoo]

I read through that, I honestly don't think its the afm itself, this will be the second one I installed, electronics only. I'm going to look over the wiring again, but this just boggles me how out ran fine before the turbo blew out and I think the brake booster blew also

 

[Jebadoo]

I did have to switch to a much shorter air filter due to a new hard intake pipe before the turbo..... could the shorter air filter (Advance auto spectre cheapy) be causing the issue? Should I just fab up a CAI or run it without the filter to see what happens?

 

[Green7mgte]

why do you think the problem is before the kvafm?

 

[Jebadoo]

If it gets improper flow, it can throw the code 31 too can't it? Oiled filters also can cause it I heard.

 

[airhead04]

If it gets improper flow, it can throw the code 31 too can't it? Oiled filters also can cause it I heard.

Oiled filters cause it because the oil in the filter gets in the electronics and destroy the metering device. Thus throwing a code 31 because your metering device is no longer functional.

 

[Jebadoo]

I'm half tempted to just save up and eliminate it. Any semi-simple fool proof ways of eliminating the afm? HKS gcc and VPC? Maftpro with MAP? MAP ECU? I'm honestly hitting walls with this thing everytime I even touch it.

 

[Green7mgte]

true on the improper flow but as long as your filter is sealed, I wouldn't see how it would make it wonky. I would be more concerned with the honeycomb in the housing causing a weird vortex more then a shitty filter. but I guess that depends on the cheapness of the filter..

 

[Jebadoo]

Update!

Afm seems to be working properly now as I no longer have a cel, however I still have a low rpm missfire and odd lumpy idle when warm, could bad gaskets and oil soaked plugs do this??

Boost seems to come in two stages as well, didn't seem to pull as hard either