stalling issues

[SeanC]

ok so i have had some stalling issues with my ka-t. whenever i push the clutch in while driving he car will idle down and sometimes catch it self at like 200 rpms and go back to idle more than likely though it will die. it will also do it from a free rev. i have the jgs bov with the vent attachement. my maf is like 8 inchs away from the turbo inlet. the air filter is not the source of the issue i already tried to run without it. i know i have a couple minor boost leaks but i do not think those could cause it to die every time. i have already cleaned the iacv by spraying carb cleaner into the feed tube. any ideas?

[gaehrings13]

Im getting tired of stalling too man. I'm going to do the boost leak test and try eliminating the iacv and all that other crap on the mani. The think I don't know is how it will react with the AC it might idle a little to low. But I guess I have to try.

But any un metered air going into the engine will make the car run like crap. Im starting to hate this damn maf system. I use to have acura integra on boost and I never had problems like this. If the turbo piping got disconnected the car could keep on going no problem still run good.

One problem with the maf, and thats it. Like I said any un metered air and the car stumbles, Pops or stalls.

[SeanC]

i am getting real close to ditching this bikirom and going with an e8.

[NateDogg]

Why don't you just recirculate the BOV or buy an S-AFC? This problem isn't anything we haven't covered before..

[SeanC]

even with the bov unhooked i have the problem. safc is a band aid.

[NateDogg]

'"unhooked" = recirculated or vented to atmosphere?

If you want help I'd suggest posting your whole setup. That way we can make a more educated guess.

[wild_maxx]

even with the bov unhooked i have the problem. safc is a band aid.

Running open BOV on a maf car is not the best for drivability. Why not recirc it?

[cesar240sx]

i turboed my 1993 3 years ago,i did ever thing to eleminates this problem, by use 3 different BOV ,reciculates ,atmosphere.every thing u name it.post my problem on this forum,and other 240sx forums.i have been working with nissan for 20 years and nissan master mechanic.listen what i am going to say after i asked every body..no answer ,i am going to tell u what u need to do.if u want to contact me that's okmy email : [email protected] make sure there is no vacum leaks. timing and idle set right.sounds a lot of work but results is real..move the AFM and install it before trottle body,u can add coulpe feet of the afm harness u should be oki did that my problem solved after long time of agrivation. i have the oem AFM, then i replace it with q45 and 370 cc injector and no s-afc or any fuel manegement..runs great 250horses/with8 pSI, i stretchet some time to 12 pSI sturve at top end..i am happy...mail me if u have question..good lucki hope that i helped some body that stuggling to find the solution for this problem...

[SeanC]

ok so i tested my system using a smoke machine. when i put it into the system my JGS bov leaks. so i am going to recirculate it.

[wild_maxx]

good idea man. I think that will solve all your problems. I have been trying to get one of the jgs BOV's but he said he's out of them and not sure if he will be making anymore of them.

Please let us know how it works out and if its worth it.

Cesar240sx: what you are talking about is refered to as a "blow through" maf setup. It does work if you want to run an open BOV but from what I have heard around here is that it will kill the maf sensor eventually... I don't how true that is.. but as long as its working for you... good job!

[WDRacing]

i turboed my 1993 3 years ago,i did ever thing to eleminates this problem, by use 3 different BOV ,reciculates ,atmosphere.every thing u name it.post my problem on this forum,and other 240sx forums.i have been working with nissan for 20 years and nissan master mechanic.listen what i am going to say after i asked every body..no answer ,i am going to tell u what u need to do.if u want to contact me that's okmy email : [email protected] make sure there is no vacum leaks. timing and idle set right.sounds a lot of work but results is real..move the AFM and install it before trottle body,u can add coulpe feet of the afm harness u should be oki did that my problem solved after long time of agrivation. i have the oem AFM, then i replace it with q45 and 370 cc injector and no s-afc or any fuel manegement..runs great 250horses/with8 pSI, i stretchet some time to 12 pSI sturve at top end..i am happy...mail me if u have question..good lucki hope that i helped some body that stuggling to find the solution for this problem...

Are you saying you have a Q45 MAF and 370's with no fuel managment of any type at all? If thats the case I'm going to call until I either see it in person or someone "I Know" can verify it.

WD

[S13FX]

I dont know about the Q45 maf. But wasn't there a trick, that is you use 370cc injectors and a N60 maf, it works out perfectly cause of the voltage curve the ecu reads from the MAF works perfectly with the pulse width of the 370cc injectors?

[WDRacing]

If it was a viable solution I would think LOTS of people would be doing that. I have no way of testing these theories and would but I'd love to find out if there is any fact to this.

WD

[cesar240sx]

Hi guys.as i said earlier i am runing 370 cc inj.and Q45 afm no S-AFC .car run good,with oldschool turbo water cooled out of 85 300zx.8 psi in normal days ,12 psi sometimes ,will sturve on the top end..on the top of that 50 wet shot of nitrous..idle fine,never cut off ,has a atmospheric bov ..i was wondering at the bigining how the afm is going to rear all this air and pressure going thru..hey it works ,has been like that for 6 month and lot of reving.i will try to post some pics if u guys wants..i have been there,been working on those cars all day and figure something out its terrible thing.just cut the cold pipe before the throttle insert the AFM extend the afm 3 wires connector have the right coupler and u need the afm air filter adapter seal it with silicone and make sure is get the o-ring connect and play..

[cesar240sx]

u know i have no reason to make things up.i did try the 370 inj on my turbo project with the OEM afm ,runs rough black smokes on idle,than i took them out.nissan parts to me is no issue i deal with them all day at work, than i tried the q45 AFM ,AND THIS THE BEST STEP I EVER DID...i am willing to try 440 cc on the same setup soon i find some cheap on ebay..regular USA market nissan did't have any goes that hi even 350Z is 315 cc..i will keep u posted