random idle fluctuation and engine stall

Ariamius · 08-11-2011, 11:32 PM

removed cold air induction which is an apex bolt on and ran car with no air filter and it stopped throwing the air flow meter code 31... any ideas?

Ariamius · 08-12-2011, 02:36 AM

also discovered have a BHG never done one about to learn any tips or suggestions would be great planning on going back with a metal HG, unless someone gives me a reason not to. Several people have told me to torque to 75lbs. Hope that is right.

Green7mgte · 08-12-2011, 02:48 AM

lets take it from the top.
you have a knock sensor code and a afm code.
As suggested re-wire your knock sensor, that will solve that problem.
Running your car w/o an air filter isn't doing anything to solve your AFM problem. You're not getting the code because you erased it after you checked it. It will come back, air filter or no. Could be one of 2 issues. 1 your afm itself broken (possible) or 2, one or more wires running to the afm are giving crap signals (more possible). You can try to wire in a new clip or replace the wires some other way. Or purchase a new afm for about 80 bucks at a scrap yard. (Ls 400 use the same electronics) I would suggest checking the voltage at the wires and see which one is giving you the issue before spending the money on a new to you afm.

Now to hit on your BHG.. are you sure you have one? if you answered yes ok. a mhg is all well and good. But the machining it takes to have one installed correctly is not able to be done by you alone. (*unless your technically savvy.*) A cosmetic HG is completely fine, unless your trying to run say 20+ psi of boost. The amount of torque needed for the bolts are dictated by what type of oil, fastener you use. stranded stock bolts yes, 75. studs are like 90 or something idk check up on it. Tons of information out there and here on the required fastener/torque recommendations.

good luck
(edit, sorry for the crap punctuation, im tired and don't care..)

Ariamius · 09-01-2011, 02:38 PM

I need to know where the knock sensor is and how to rewire it to get rid of the knock senosr code.

Awyman18 · 09-04-2011, 05:24 PM

My suggestion....by a ishino headgasket set. Its a cosmetic hg and its basically wat was originally used. I fixed my bhg with that, and don't buy arp head bolts...buy the studs! The studs is a massive overkill, but there going to be like....maybe $15 more then bolts. Machine the head....and have it chemically bathed. That is a must no matter wat hg u buy. If u go cosmetic....go to autozone or andvanced, buy this purpleish colored wire/sand paper junk. Buy it so it can go on the end of a drill. Use that on the block and clean the crap out of it. Don't be scared to get a little fierce with it..just my advice if ur gonna do it.

cre · 09-04-2011, 07:12 PM

Quote:

Originally Posted by Awyman18

Its a cosmetic hg and its basically wat was originally used.

Um.... No. The stock HG was a graphite composite HG; Cometic is a multi-layer steel HG and requires significantly more prep of both block and head.

Awyman18 · 09-05-2011, 07:54 PM

cosmetic....as in not metal....lots of people refer to the stock hg as a cosmetic hg...simply because its not metal. rarely ever hear anyone call it a graphite hg. Either metal multi-layered steel hg, or a cosmetic/composite hg.

08-11-2011, 11:32 PM	#1
Ariamius Stock Join Date: Aug 2011 Location: Louisiana Posts: 10	cold air induction removed cold air induction which is an apex bolt on and ran car with no air filter and it stopped throwing the air flow meter code 31... any ideas?

08-12-2011, 02:36 AM	#2
Ariamius Stock Join Date: Aug 2011 Location: Louisiana Posts: 10	Bhg also discovered have a BHG never done one about to learn any tips or suggestions would be great planning on going back with a metal HG, unless someone gives me a reason not to. Several people have told me to torque to 75lbs. Hope that is right.

08-12-2011, 02:48 AM	#3
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	lets take it from the top. you have a knock sensor code and a afm code. As suggested re-wire your knock sensor, that will solve that problem. Running your car w/o an air filter isn't doing anything to solve your AFM problem. You're not getting the code because you erased it after you checked it. It will come back, air filter or no. Could be one of 2 issues. 1 your afm itself broken (possible) or 2, one or more wires running to the afm are giving crap signals (more possible). You can try to wire in a new clip or replace the wires some other way. Or purchase a new afm for about 80 bucks at a scrap yard. (Ls 400 use the same electronics) I would suggest checking the voltage at the wires and see which one is giving you the issue before spending the money on a new to you afm. Now to hit on your BHG.. are you sure you have one? if you answered yes ok. a mhg is all well and good. But the machining it takes to have one installed correctly is not able to be done by you alone. (unless your technically savvy.) A cosmetic HG is completely fine, unless your trying to run say 20+ psi of boost. The amount of torque needed for the bolts are dictated by what type of oil, fastener you use. stranded stock bolts yes, 75. studs are like 90 or something idk check up on it. Tons of information out there and here on the required fastener/torque recommendations. good luck (edit, sorry for the crap punctuation, im tired and don't care..) __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines : Last edited by Green7mgte; 08-12-2011 at 02:50 AM.

09-01-2011, 02:38 PM	#4
Ariamius Stock Join Date: Aug 2011 Location: Louisiana Posts: 10	help with knock sensor I need to know where the knock sensor is and how to rewire it to get rid of the knock senosr code.

09-04-2011, 05:24 PM	#5
Awyman18 3" Exhaust Join Date: Apr 2011 Location: columbus Posts: 151	My suggestion....by a ishino headgasket set. Its a cosmetic hg and its basically wat was originally used. I fixed my bhg with that, and don't buy arp head bolts...buy the studs! The studs is a massive overkill, but there going to be like....maybe $15 more then bolts. Machine the head....and have it chemically bathed. That is a must no matter wat hg u buy. If u go cosmetic....go to autozone or andvanced, buy this purpleish colored wire/sand paper junk. Buy it so it can go on the end of a drill. Use that on the block and clean the crap out of it. Don't be scared to get a little fierce with it..just my advice if ur gonna do it.

09-05-2011, 07:54 PM	#7
Awyman18 3" Exhaust Join Date: Apr 2011 Location: columbus Posts: 151	cosmetic....as in not metal....lots of people refer to the stock hg as a cosmetic hg...simply because its not metal. rarely ever hear anyone call it a graphite hg. Either metal multi-layered steel hg, or a cosmetic/composite hg.