Induction kit running issue

[discomark10]

Hi guys,
I installed an iduction kit to replace the standard air box today.
It started fine, idle seemed ok, but when I took it for a test drive it was very slugish and sort of bogged down a low/med revs. Seemed to run a bit better with higher up the revs.
I ended up putting it back to standard shortly after as I needed to use it and it ran fine so the maf must be ok.

Any idea's why it ran like that? :iono:

Thanks

[tooter]

You could try putting your new intake back on and disconnecting your negative battery cable for about ten minutes so that your computer will forget the old stock air box operating parameters, and learn the new parameters of your intake. :thumbsup:

[Bluevitz-rs]

What's the inside diamater of the pipe on the new intake? If it's any bigger than stock the MAF will read less air passing by and give less fuel making LESS power.

[Kaotic Lazagna]

Could be one or both of what was mentioned above.


Disconnect the negative terminal on the battery. Pump your brakes until it becomes stiff. Let it sit for like 10-15 minutes. Reconnect the battery terminal, and start your engine and let idle for ~15 minutes. Do NOT step on the gas or anything, just let it idle. That should help.

[discomark10]

Cool ill give it a go, what does pumping the brakes do?

[Bluevitz-rs]

Cool ill give it a go, what does pumping the brakes do?

Nothing. Because as soon as you open the door the dome light turns on. And drains any residual charge in the electrical system.

[discomark10]

Nothing. Because as soon as you open the door the dome light turns on. And drains any residual charge in the electrical system.

Man, all the fangled technology! Give me an old Land Rover any day ;) :bellyroll:

[WeeYari]

What's the inside diamater of the pipe on the new intake? If it's any bigger than stock the MAF will read less air passing by and give less fuel making LESS power.

^ This. You never answered the question about inside diameter. What kit are you running?

The ECU is very particular about air passing the MAF. Deviate from 2.25" inside diameter on the pipe and you'll typically run into problems.

[cali yaris]

Did you disconnect the battery when installing, so your ECU can relearn with your new intake?

[discomark10]

^ This. You never answered the question about inside diameter. What kit are you running?

The ECU is very particular about air passing the MAF. Deviate from 2.25" inside diameter on the pipe and you'll typically run into problems.

ill have to check it out tomorrow

Did you disconnect the battery when installing, so your ECU can relearn with your new intake?

yes but only for a couple min, will be tryng it tomorrow also

[Kaotic Lazagna]

Cool ill give it a go, what does pumping the brakes do?

Nothing. Because as soon as you open the door the dome light turns on. And drains any residual charge in the electrical system.

Just a little extra to get any and all residual charge out. I've had better luck with pumping my brakes than not.

[discomark10]

^ This. You never answered the question about inside diameter. What kit are you running?

The ECU is very particular about air passing the MAF. Deviate from 2.25" inside diameter on the pipe and you'll typically run into problems.

just checked, its 2.32" (59mm) rather than 2.25" (57mm) .... (25.5cm2 over 27.3cm2)
Only a tad bigger, wouldn't Imagen that small a difference will cause a problem would it?

[OTA'sTOY]

what brand intake did you get?

[Bluevitz-rs]

just checked, its 2.32" (59mm) rather than 2.25" (57mm) .... (25.5cm2 over 27.3cm2)
Only a tad bigger, wouldn't Imagen that small a difference will cause a problem would it?

2734mm2 = 59mmØ
2551.75mm2 = 57mmØ

That's a 7% jump with no additional fuel.

[discomark10]

what brand intake did you get?

I fabricated it myself as they cost the equivalent of around $250 here... :eek:
I'm going to have to either fix or remake it, if resetting the ECU reset fails.
It only cost about $15 to make out of stainless, so a bit cheaper!

[BEEF]

leave the part of the stock input pipe with the MAF on it and put a high flow filter in place of the paper filter. The diameter of the pipe at the MAF is very sensitive (as stated above).

I feel you on the price, mine was ~$200

[discomark10]

So today I had another go at sorting it out. Reset the ecu as sujested. It did run better but still no where near right.


The ECU is very particular about air passing the MAF. Deviate from 2.25" inside diameter on the pipe and you'll typically run into problems.

This seems to be the problem, I made a restrictor to put inside to reduce the ID of the tube and it helped allot! I still think it was down on power a lil bit.
Ive put it back to standard untill I can remake it with a smaller ID tube or of course get a premade one.

Does anybody know what size ID the aftermarket one is?

[cali yaris]

Was this answered?

what brand intake did you get?

[WeeYari]

^ yes, it is homemade.

[cali yaris]

Oh.

[Bluevitz-rs]

^^^

I fabricated it myself as they cost the equivalent of around $250 here... :eek:
I'm going to have to either fix or remake it, if resetting the ECU reset fails.
It only cost about $15 to make out of stainless, so a bit cheaper!

[tooter]

I fabricated it myself as they cost the equivalent of around $250 here... :eek:
I'm going to have to either fix or remake it, if resetting the ECU reset fails.
It only cost about $15 to make out of stainless, so a bit cheaper!

Hey disco, can you post a pic of your intake? Maybe if we can see it, we can help you figure out how to make it work. :thumbsup: I admire that you're adventurous enough to try to make one up. I just measured the outside diameter of the two intakes I have:

Weapon R 57mm
Simota 59.5mm

Both work fine, and the difference might be the wall thickness of the tubing. I'll need to disassemble them to get the more accurate inside measurements. How your MAF sensor is positioned relative to the center of the tubing is important. Maybe spacing it up or down will help. I'm taking the intakes apart today to get a better fit on the throttle body so I'll take some measurments and let you know. :smile:

Greg

[WeeYari]

The ID of my PRM Jetstream intake is 2.25".

[discomark10]

Hey disco, can you post a pic of your intake? Maybe if we can see it, we can help you figure out how to make it work. :thumbsup: I admire that you're adventurous enough to try to make one up.
Greg

I wont be able to get a pic until Sunday or Tuesday now as im back on shift :(
But it looks allmost identical to this http://www.ebay.com/itm/400295390141?item=400295390141&viewitem=&category=38634&vxp=mtr
(yay for google!)


How your MAF sensor is positioned relative to the center of the tubing is important. Maybe spacing it up or down will help. I'm taking the intakes apart today to get a better fit on the throttle body so I'll take some measurments and let you know. :smile:
Greg

As for positioning, I'm pretty sure it was well centred, if I remake one ill make sure its positioned as good as I can.


I just measured the outside diameter of the two intakes I have:
Weapon R 57mm
Simota 59.5mm

The ID of my PRM Jetstream intake is 2.25".

Awesome thanks, is it the same size tubing for the bit you measured all the way along the length?

[WeeYari]

Awesome thanks, is it the same size tubing for the bit you measured all the way along the length?

Yes.

[discomark10]

I think this should do the job.. http://pages.ebay.com/link/?nav=item.view&id=280776018618