Beams Swap - Idle Issue

[turnip]

Figure I would check in and see if some of you beams expert could weight in on my idle issue as I am just finishing up a swap into a 94gt celica. I did not get the stock airbox so I got one of the intakes from ebay thats had the AFM adapter. I suspect my issue is vacuum or AFM related. It reoccurs when it goes from open to closed loop when it warms up. Below is a link to some videos I took of the issue. First one show a 500rpm swing and then when brake is applied its surges from 1k to 2k. Intake inside diameter is 2.95". Appreciate any insight or assistance.
Thanks


YouTube - DrunkRadish

[MANDALAY]

Yes to both your answers. Get a factory box and connect all your hoses = no problems

[mr220v]

I run a similar intake with no issues. Vacuum leak maybe?

[turnip]

Originally Posted by MANDALAY

Yes to both your answers. Get a factory box and connect all your hoses = no problems

After going over all the connections I am beginning to doubt that its a vacuum leak. I think its intake/AFM sensititivity thats the culprit here. Vacuum is related but only on the side that it affects the pressure level inside the manifold and intake.

I have not had any luck finding a beams airbox at this point. Will have to see if I can fabricate something up using the stock celica airbox.

[mr220v]

Did you check the bolts that hold the intake manifold on? That and the spacer?

[njccmd2002]

Originally Posted by mr220v

I run a similar intake with no issues. Vacuum leak maybe?

do you have the same diameter?

is there another way to run this setup , like using aftermarket control, most swaps dont come with the airbox, and

it seems that this maf is really sensitiuve...

[mr220v]

Originally Posted by njccmd2002

do you have the same diameter?

is there another way to run this setup , like using aftermarket control, most swaps dont come with the airbox, and

it seems that this maf is really sensitiuve...

The substitute is to buy an aftermarket intake from a 98+ 1mzfe (we've been doing this for a while). The beams 3sge uses the same maf as the 1mz. The cheap aftermarket pipes give you the correct diameter pipe, and the correct air velocity over the heater element, along with the correct mounting bracket. Stuffing the maf in a random rubber intake hose gives you too much or too little. That and having the sensor turned off at an angle can cause problems.

[turnip]

Originally Posted by njccmd2002

do you have the same diameter?

is there another way to run this setup , like using aftermarket control, most swaps dont come with the airbox, and

it seems that this maf is really sensitiuve...

Its crazy sensitive. If I hold the intake close to the radiator fan the idle changes just from the little wind off the fan. Looks like I just have to find the balance that works for all the sensors.


As for the throttle body bolts and gasket they all look good.

[turnip]

99-02 TOYOTA CAMRY SOLARA V6 AIR INTAKE SYSTEM 00 01:eBay Motors (item 370251767788 end time Oct-26-09 17:28:31 PDT) Thats the intake I got.

[mr220v]

Like I say, I would check the manifold bolts on the head too.

I'm using a similar intake, except mine is not black.

[njccmd2002]

turnip 6gc is down, can you repost the pic where you have it assembled? just too see the orientation

[turnip]

Originally Posted by mr220v

Like I say, I would check the manifold bolts on the head too.

I'm using a similar intake, except mine is not black.

Checked all the bolts holding the intake manfold to the head and the black spacer between looks good. I will look more thoroughly at lunch when its running to see if I can feel or hear a leak back there.

[njccmd2002]

nevermind the pic, i saw the video, why dont you turn the intake around so the return hose behind the maf, that also causes turbulence and in the long run make your maf dirty

[turnip]

Originally Posted by njccmd2002

nevermind the pic, i saw the video, why dont you turn the intake around so the return hose behind the maf, that also causes turbulence and in the long run make your maf dirty

The ebay intake has two spots for a vacuum hose to attach. One before the AFM and one below the AFM. Since I am using the stock elbow. I just have the hose that came with the intake on both nipples to avoid a vacuum leak. That is all.

[njccmd2002]

well im no expert but why no just plug both nipples, cuz, just by a long shot, it can be causing a whirpool effect, some of the air must go through one of the nipples and come thourgh the other, therefore not laminar flow, might give it a shot.

[mr220v]

I'm doing the same thing he is with the nipples. No issues.

[turnip]

Spent the afternoon messing with it and it no longer surges just idles high. Will see how long that last. I am a bit puzzled and didnt do anything really to make it stop. Have any of you guys messed with the idle/throttle screw or played with the TPS sensor to adjust the idle?

Thanks

[batman722]

don't mess with the tps. In the last video you had the break booster hose disconected and you were covering the intake.
Connect the booster hose and then try covering the intake. That should make the motor stall completely. If it doesn't stall then you have a vac leak. At that point listen for a hissing sound that shouldn't be there. My guess off the top of my head is either the injectors aren't seated properly or the intake mani isn't torqued down properly. Get a can of carb cleaner and spray it around those areas little by little. If there is a leak the carb cleaner should make the motor stall or the idle should drop for a few moment. I think you have air getting in there causing the idle to be like that...it was a small leak like a drip causing the idle to go up and down but now it's no longer a drip, it's starting to pour in, you dig ? that's step one.

Step 2, if the motor stalls completly when you cover the intake then you might have bigger problems. We'll worry about that later.

questions...

what did you use to clean the AFM ?
and how ?
is that a K&N filter on the end of the intake or a cheapo ?
have you checked for any codes ?

[MANDALAY]

On the last of the Red Tops the inlet manifold has a nipple between runner 3 and 4 do you have the blocking grommit there ?

[turnip]

Originally Posted by batman722

don't mess with the tps. In the last video you had the break booster hose disconected and you were covering the intake.
Connect the booster hose and then try covering the intake. That should make the motor stall completely. If it doesn't stall then you have a vac leak. At that point listen for a hissing sound that shouldn't be there. My guess off the top of my head is either the injectors aren't seated properly or the intake mani isn't torqued down properly. Get a can of carb cleaner and spray it around those areas little by little. If there is a leak the carb cleaner should make the motor stall or the idle should drop for a few moment. I think you have air getting in there causing the idle to be like that...it was a small leak like a drip causing the idle to go up and down but now it's no longer a drip, it's starting to pour in, you dig ? that's step one.

Step 2, if the motor stalls completly when you cover the intake then you might have bigger problems. We'll worry about that later.

questions...

what did you use to clean the AFM ?
and how ?
is that a K&N filter on the end of the intake or a cheapo ?
have you checked for any codes ?

Intake and filter is a cheapo. Did not clean the afm at all yet. Didnt want to take a chance messing it up. Havent checked for any codes at this point. Not even sure if this car has an odb1 port under the dash. Has the diagnostic on the harness but not sure if my scanner will work with that.

I will mess with it again tomorrow and snap a few more vids.

Thanks for all the input.