Misfire into multiple cylinder! - Toyota Yaris Forums

maxthehax · 07-02-2012, 10:09 PM

Till last week something started. Sometimes when on low-mid load, the engine feels like it cut-off for a second only, and it started to bug me. I was still able to drive it normally without major problem.

I though it was my MAF getting too dirty, so I cleaned it. It did not cure the problem and Im not sure if it helped. Car was still driving perfect except that little cut-off.

Today, I started to intall my oil cooler. I did not finish the job because of a malfunction in a part. So I simply put back my oil filter and some intercooler piping on.
Batterie was plugged all the time.
I cutted, I grinded, with 2 tools, a grinder and my dremel.
And I played with my oil filter...

Those things are the only one I did... This morning I start the car and it runs like a Cam'd muscle car or a subaru.
3 CEL; P0300, P0302, P0303, well I think they are all missfire into one or multiple cylinder.

Could I have damage something electrical? Coils, or the FIC? Maybe a fuse? Because I used my electrical tools on the car.

This morning when my car was missfiring like shitt, I started by removing all intercooler piping, clean the inside, reclean the MAF.
Now the problem is almost gone, I can take-off from the first gear, and the engine idle a lot better. But it is still not good, on load it look like it missfire/cut-off.

I will try to change that MAF for a new one, also I think it would be good to change my O2 sensors they are old as hell.

maxthehax · 07-03-2012, 11:06 AM

UPDATES

This morning the car was bad as hell, missfire into multiple cylinder again. P0300, P0302, P0303, P0304...

I simply removed my AEM FIC, replugged like OEM, the car runs fine now but very very rich! The stock ecu cannot take my 370cc injectors

So I think my FIC was the problem...

I will reinstall my stock injectors, or I will simply fools my plugs running that rich. 10:1 AFR on low low low load... haha 12:1 idle

1.5 · 07-03-2012, 12:36 PM

those things are always having issues. So many units have problems. Hope they send you a new unit.

Yoda · 07-03-2012, 01:46 PM

Do you have the plug and play or is it wired in?

maxthehax · 07-03-2012, 08:59 PM

Quote:

Originally Posted by Yoda

Do you have the plug and play or is it wired in?

I have the plug n play harness... Thats why it took me 5 mins removing it and plugging the oem back.

I need to find out whats the best standalone ECU to get for my car, it seems to be so big of a job...

I lost so much power all over my rpm/load range without the FIC, thats incridible!...

Yoda · 07-04-2012, 09:36 AM

It might be the unit but most issues with it are due to wiring it up. But you have the pnp harness so I don't know. I heard sone had problems with the boomslang harness tho. Ask Scott

maxthehax · 07-04-2012, 12:28 PM

Quote:

Originally Posted by Yoda

It might be the unit but most issues with it are due to wiring it up. But you have the pnp harness so I don't know. I heard sone had problems with the boomslang harness tho. Ask Scott

I ran the FIC for a year now, It was fine until about a week. And a morning it simply wont work like I described in first post...

Anyway I would just like to learn more about the work implicated into installing a full standalone ecu on my car. I dont want to plug a piggyback again...

Unfortunatly there is no documentations about installing lets say a universal EMS on my car...

maxthehax · 07-19-2012, 08:42 AM

I have updates;

Even if my FIC worked ``fine`` for a year before messin up, I decided to take a close look at the wiring. Lets says the lack of PLug N play standalone system and their very high prices make me think about it a couple days. I come to the conclusion that I already spent enough and I have other project in life (dont worry I still love my car like before! lol)

So to make sure I have a 100% correct connections I decided to buy a PLUG N PLAY harness for the scion xb, sold by dezod.

I will give more infos when I receive that harness and try it out!

cali yaris · 07-20-2012, 06:42 PM

^ You didn't buy from us?

cali yaris · 07-20-2012, 06:44 PM

Quote:

I have the plug n play harness... Thats why it took me 5 mins removing it and plugging the oem back.

Even with custom wiring, I believe you can use the Null connectors that come with the FI/C and disable it. I did that on mine before my tuning was done.

fnkngrv · 07-20-2012, 07:44 PM

Quote:

Originally Posted by cali yaris

Even with custom wiring, I believe you can use the Null connectors that come with the FI/C and disable it. I did that on mine before my tuning was done.

Yup....I am still using my bypass since I can't seem to idle for shit with this replacement motor. Using same maps as other motor which would idle fine, yet with this one it won't. Stupid.

maxthehax · 07-21-2012, 07:23 AM

Quote:

Originally Posted by cali yaris

^ You didn't buy from us?

Lol, do you really make a plug n play for the echo?

I though you were but for the Yaris...

Updates;
My package just passed the Canada border. I should reveice it during the week.

I feel a lot like I will plug everything and it will still be the same lol. At least I will know its not a wiring issue.

Q: Does it happen sometimes that FIC/piggyback unit could lost some datas in memories?

cali yaris · 07-21-2012, 10:17 AM

A: It's easy to reload your map, and see if anything changes.

Quote:

Lol, do you really make a plug n play for the echo? I though you were but for the Yaris...

You're on our forums -- you know we serve all brands of cars and source parts for everyone. If I don't have a chance to earn your business, I can't be a vendor.

maxthehax · 07-21-2012, 02:47 PM

Quote:

Originally Posted by cali yaris

A: It's easy to reload your map, and see if anything changes.

You're on our forums -- you know we serve all brands of cars and source parts for everyone. If I don't have a chance to earn your business, I can't be a vendor.

I understand :P

And dont worry I already rock`s a couple of your parts :P

I just received your new fuel rail, very nice finish. If I can get that FIC working again, it will be my next install.

Btw, off topic, are you able to source me a carbon fiber hood for my echo/vitz hatch?

Thanks

cali yaris · 07-21-2012, 04:07 PM

^ I'll check, but probably not from the USA, I don't think we had the Echo hatch here, or very many of them -- maybe someone else knows better than me.

maxthehax · 07-23-2012, 10:37 AM

UPDATES;

Harness installed. I still get missfiring, I can move the car but not drive it. It runs rough...

I want to plug a laptop on it. What should I look at first if my problem is missfiring?

Thanks!

chaditotx · 09-06-2012, 03:50 AM

What do your plugs look like? Coilpacks? Did you nick anything on the factory harness? Crank position sensor?

maxthehax · 12-10-2012, 10:10 AM

Quote:

Originally Posted by chaditotx

What do your plugs look like? Coilpacks? Did you nick anything on the factory harness? Crank position sensor?

Everything was alright... The FIC unit itself was the problem.

I changed to a new unit with the same PnP harness, everything is fine now.

Thanks for inputs everyone!

07-02-2012, 10:09 PM	#1
maxthehax View User's Garage Drives: Echo HB Turbo 6Speed Join Date: Sep 2010 Location: Quebec Posts: 52	Misfire into multiple cylinder! Till last week something started. Sometimes when on low-mid load, the engine feels like it cut-off for a second only, and it started to bug me. I was still able to drive it normally without major problem. I though it was my MAF getting too dirty, so I cleaned it. It did not cure the problem and Im not sure if it helped. Car was still driving perfect except that little cut-off. Today, I started to intall my oil cooler. I did not finish the job because of a malfunction in a part. So I simply put back my oil filter and some intercooler piping on. Batterie was plugged all the time. I cutted, I grinded, with 2 tools, a grinder and my dremel. And I played with my oil filter... Those things are the only one I did... This morning I start the car and it runs like a Cam'd muscle car or a subaru. 3 CEL; P0300, P0302, P0303, well I think they are all missfire into one or multiple cylinder. Could I have damage something electrical? Coils, or the FIC? Maybe a fuse? Because I used my electrical tools on the car. This morning when my car was missfiring like shitt, I started by removing all intercooler piping, clean the inside, reclean the MAF. Now the problem is almost gone, I can take-off from the first gear, and the engine idle a lot better. But it is still not good, on load it look like it missfire/cut-off. I will try to change that MAF for a new one, also I think it would be good to change my O2 sensors they are old as hell.

07-03-2012, 12:36 PM	#3
1.5 Form>Function Drives: 07 Flint Sedan Join Date: Dec 2009 Location: Tampa Posts: 4,018	those things are always having issues. So many units have problems. Hope they send you a new unit. __________________ Instagram: @southernstreets_phil Facebook.com/southernstreetsempire

07-20-2012, 06:42 PM	#9
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	^ You didn't buy from us? __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

07-21-2012, 04:07 PM	#15
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	^ I'll check, but probably not from the USA, I don't think we had the Echo hatch here, or very many of them -- maybe someone else knows better than me. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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07-03-2012, 11:06 AM	#2
maxthehax View User's Garage Drives: Echo HB Turbo 6Speed Join Date: Sep 2010 Location: Quebec Posts: 52	UPDATES This morning the car was bad as hell, missfire into multiple cylinder again. P0300, P0302, P0303, P0304... I simply removed my AEM FIC, replugged like OEM, the car runs fine now but very very rich! The stock ecu cannot take my 370cc injectors So I think my FIC was the problem... I will reinstall my stock injectors, or I will simply fools my plugs running that rich. 10:1 AFR on low low low load... haha 12:1 idle

07-03-2012, 01:46 PM	#4
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	Do you have the plug and play or is it wired in?

07-04-2012, 09:36 AM	#6
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	It might be the unit but most issues with it are due to wiring it up. But you have the pnp harness so I don't know. I heard sone had problems with the boomslang harness tho. Ask Scott

07-19-2012, 08:42 AM	#8
maxthehax View User's Garage Drives: Echo HB Turbo 6Speed Join Date: Sep 2010 Location: Quebec Posts: 52	I have updates; Even if my FIC worked ``fine`` for a year before messin up, I decided to take a close look at the wiring. Lets says the lack of PLug N play standalone system and their very high prices make me think about it a couple days. I come to the conclusion that I already spent enough and I have other project in life (dont worry I still love my car like before! lol) So to make sure I have a 100% correct connections I decided to buy a PLUG N PLAY harness for the scion xb, sold by dezod. I will give more infos when I receive that harness and try it out!

07-23-2012, 10:37 AM	#16
maxthehax View User's Garage Drives: Echo HB Turbo 6Speed Join Date: Sep 2010 Location: Quebec Posts: 52	UPDATES; Harness installed. I still get missfiring, I can move the car but not drive it. It runs rough... I want to plug a laptop on it. What should I look at first if my problem is missfiring? Thanks!

09-06-2012, 03:50 AM	#17
chaditotx Drives: 2007 3dr hb 5sp Join Date: May 2012 Location: San Antone, Tx Posts: 117	What do your plugs look like? Coilpacks? Did you nick anything on the factory harness? Crank position sensor?