random idle fluctuation and engine stall

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..)

08-12-2011, 02:48 AM	#9
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.