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Old 04-06-2010, 11:15 PM   #1
hernan_Arg
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Default 2.0/2.5 Hybrid engine with problems, need help!!!

Hi, a couple of weeks go I finished putting together my hybrid engine,
I'ts a EJ257 short block with EJ205 heads, the heads were fully rebuilted, 1,5mm OEM head gaskets, new oil/water pumps, new timming components.
TGV deleted.
Unequal lenght headrer w/ up pipe.
3" downpipe
The first time that I started the car it was running perfect, but after 4/5 minutes, it started to sound like it has a misfire.
It continued with this issue at idle, when I tried to rev the engine it seems to be working good.
The thing is, after a couple of hours I found that the inyectors 1 & 2 stopped to work at idle, and they work again when I pushed the gas pedal.
Once the engine started cold, after 5 min, it works in 2 cyl, I replaced the ECU, and it's the same, replaced the AFM and the problem continued.
What else I have to check?
Also the engine revs so high, it starts around 1700, and after a couple of minutes it's still runing at 1300/1400 and never goes lower than this.
I did a scan of the engine, and the scanner found:
O2 sensor (some proboem with the heater)
IACV malfuction
and 2 codes for the TGV's R+L
This is all I got, please if somebody heard about something like that please let me know, I spent a lot of money and I can't use the car......
Of course I checked compression and everything was fine, checked the spark and was perfect too, but the inyector poulse dies after 5 min of run.
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Old 04-06-2010, 11:19 PM   #2
spinningcain
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What kind of tune?
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Old 04-06-2010, 11:35 PM   #3
jarencibia
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The 02 heater code is from your exhaust probably.
The IACV idle air control valve you can clean out for not much money (search for it) or replace it for 300 bucks.
The tgv code you will have to disable in the ecu with some tuning method like romraider/ecuflash/tactrix cable.

Sounds like the most important thing is the IACV cleaning for now.
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Old 04-07-2010, 12:30 AM   #4
Haelan
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Quote:
Originally Posted by jarencibia View Post
The 02 heater code is from your exhaust probably.
The IACV idle air control valve you can clean out for not much money (search for it) or replace it for 300 bucks.
The tgv code you will have to disable in the ecu with some tuning method like romraider/ecuflash/tactrix cable.

Sounds like the most important thing is the IACV cleaning for now.
If the heater circuit is fried on the O2 sensor--the whole sensor needs to be replaced.

The IACV definitely should be cleaned. It can throw a phantom code if it is unable to control the idle in any position. This can happen if the cruise control cable is too tight.

The TGV codes should definitely NOT be deleted especially if you still have them. If one side is stuck closed your vehicle will not run well at all.

I think you made some mistakes putting this thing back together.
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Old 04-07-2010, 12:56 AM   #5
ROFLBOXER
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2.5xtr+W2A IC

Default Re: 2.0/2.5 Hybrid engine with problems, need help!!!

^^^ he said he deleted his TGVs, in which case he would have no trouble if he cleared the codes.

IACV is a good start, but before the flaming starts, TUNE!

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Old 04-07-2010, 01:02 AM   #6
Haelan
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Originally Posted by ROFLBOXER View Post
^^^ he said he deleted his TGVs, in which case he would have no trouble if he cleared the codes.
Agreed, I missed that part.
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Old 04-07-2010, 06:32 AM   #7
hernan_Arg
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Ok, there are a lot of helpfull info!
Yeesterday I removed the intake manifold complete in order to check all the plugs on the wiring harness, I striped it to paint it in red, so maybe something is wrong, a ground conection, plugs, or something else, but today I'm going to check it complete.
About the O2 sensor it's brand new, it's a BOSCH sensor with smart link plug.
Today before put the trothle body back in the manifold I'm going to clean the IACV, can I use carburetor cleaner or must be cleaned with other method?
About the tune, the ECU is stock, my plan is instal a Megasquirt in the next week, because in a couple of weeks I'm going to replace the turbo, inyectors, fuel pump etc, and a friend of mine is going to install it for free, so it's cheaper than a Cobb accesport and give me infinite tunning possibilities.
What do you guys think about the inyectors issue? it can be related with some of the trouble codes?
I worked with cars for years, but never something like this happened to me, never a car shut down two inyectors and the engine continued running...
I'll keep you posted abuot what I can find, and thaks for your help!!
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Old 04-07-2010, 07:18 AM   #8
indytruckboy
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you are going way too far without a tune and you will have a catastrophic engine failure and piss your money down the tubes.
stop worrying about trouble codes and throwing money at it.
throw money at a tuner. you can't fix this yourself.
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Old 04-07-2010, 07:40 PM   #9
hernan_Arg
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Ok, I'm going for a Megasquirt, but it could take a couple of weeks, to have it done and I really want to use the car ASAP.
Do you guys think that a Cobb Accesport could fix my tuning problems?
I read in the forums abut a guy that sells the maps for this device, I'm thinking about this to fix the problem right now, and when everything is complete I can swap to the MS.
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Old 04-07-2010, 09:39 PM   #10
skimobile
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in"Special Ed." Run Group

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I'm thinking you better start saving for your next engine of you don't get it to a tuner since you're running the stock/UNFLASHED ECU on a 2.5L Hybrid, TGV deletes, etc, etc.
You're just asking for trouble just for the sake of being impatient.
Do you have a wideband O2 sensor? What are the A/F ratios?
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Old 04-07-2010, 10:38 PM   #11
mongoosaroo
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jesus tuned my hot rod

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Quote:
Originally Posted by hernan_Arg View Post
Ok, I'm going for a Megasquirt, but it could take a couple of weeks, to have it done and I really want to use the car ASAP.
Do you guys think that a Cobb Accesport could fix my tuning problems?
I read in the forums abut a guy that sells the maps for this device, I'm thinking about this to fix the problem right now, and when everything is complete I can swap to the MS.
no it will not. you need to have your car tuned by a tuning professional. why are you going with a "megasquirt"? it's kinda archaic. might i suggest having your car open sourced tuned? i'm sure miami has more than a couple compatent tuners.
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Old 04-07-2010, 11:50 PM   #12
hernan_Arg
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Quote:
Originally Posted by skimobile View Post
I'm thinking you better start saving for your next engine of you don't get it to a tuner since you're running the stock/UNFLASHED ECU on a 2.5L Hybrid, TGV deletes, etc, etc.
You're just asking for trouble just for the sake of being impatient.
Do you have a wideband O2 sensor? What are the A/F ratios?
I'm getting a wideband on this weekend, but I think that I can't break anything because the car is not drivable, I just started and drove it for no more than 2 or 3 blocks most at idle (1500 rpm) and the faillure started, and then I never moved it again, it's just sitting at friend's shop.

Quote:
Originally Posted by mongoosaroo View Post
no it will not. you need to have your car tuned by a tuning professional. why are you going with a "megasquirt"? it's kinda archaic. might i suggest having your car open sourced tuned? i'm sure miami has more than a couple compatent tuners.
The thing is my friend have a MS in his MR2 and he got great results, his car is running pretty fast, and it's very realiable.
Maybe the MS is not the best option, and I know that, but is an affordable way to get some good tune.
I just replaced the engine, and got a lot of upgrades in mind, and I really don't want to go back to my tuner anytime I change anything, this is why I want something like a MS.
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Old 04-08-2010, 12:45 AM   #13
NoHandsNurse
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You have a unique set up that is probably going to require some skilled tuning. Hybrid motors can be prone to knock and are not always an easy tune, I think you should invest some time into researching tuning options. Borrowing a tactrix cable from someone local and using it to get an inexpensive e-tune from someone reputable is going to be a way better option than using a MS.
The first most obvious thing wrong with your car is that it has not been tuned for the mods, that should be a starting point in your quest to battle the gremlins beneath your hood. Good luck.

Quote:
The thing is my friend have a MS in his MR2 and he got great results, his car is running pretty fast, and it's very realiable.
Maybe the MS is not the best option, and I know that, but is an affordable way to get some good tune.
I just replaced the engine, and got a lot of upgrades in mind, and I really don't want to go back to my tuner anytime I change anything, this is why I want something like a MS.
Welcome to subarus???
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Old 04-08-2010, 02:10 PM   #14
mongoosaroo
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jesus tuned my hot rod

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Quote:
Originally Posted by hernan_Arg View Post
I'm getting a wideband on this weekend, but I think that I can't break anything because the car is not drivable, I just started and drove it for no more than 2 or 3 blocks most at idle (1500 rpm) and the faillure started, and then I never moved it again, it's just sitting at friend's shop.


The thing is my friend have a MS in his MR2 and he got great results, his car is running pretty fast, and it's very realiable.
Maybe the MS is not the best option, and I know that, but is an affordable way to get some good tune.
I just replaced the engine, and got a lot of upgrades in mind, and I really don't want to go back to my tuner anytime I change anything, this is why I want something like a MS.


ahhhh....unfortunatly not all cars are created equal. your subie is maf based and the mr2 is map based. if you go to a protuner they can tune your car by reflashing your stock ecu. no need to buy an ap or ms. just open source tune.
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Old 07-27-2010, 08:45 PM   #15
hernan_Arg
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edit>wrong post

Last edited by hernan_Arg; 07-27-2010 at 08:56 PM. Reason: wrong thread
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