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Old 03-15-2011, 03:16 AM   #1
TheYonks
Scooby Newbie
 
Member#: 193455
Join Date: Nov 2008
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2004 JBP WRX Wagon
6262'd hybrid motor

Default Hybrid motor shaking and running rough

I cranked my hybrid build for the first time sunday night, it started right up but the motor was shaking violently. It also hesitates when its given throttle. The shaking was worst around 1000-1500 rpms and it smoothed out a little bit when I brought the rpms up to 2k but it was still running rougher than normal. There are no CELs and I ruled out a leak when I unplugged the MAF and it stalled out.

I don't think the timing belt is off because all the marks lined up after I turned the motor over a few times when I installed the belt, I even have a pic of it here http://img23.imageshack.us/f/img2841w.jpg/

The only thing I can think of is the spark plugs/coil packs not working and I noticed one of the injectors seems to be pushed into the fuel rail alot more than the others (the gasket with the groove on it is smushed down while the other 3 look flush). Though my injectors were cleaned and flow tested prior to installation.

Anyone have any other ideas?
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Old 03-15-2011, 04:01 AM   #2
FuJi K
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Member#: 3687
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul, MN
Vehicle:
MY99 GF4 JDM 6spd
NF Performance

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Start the car back up with the MAF unplugged.
Unplugging the MAF while the engine is running will shut the engine off.
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Old 03-15-2011, 10:58 AM   #3
mick_the_ginge
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Member#: 27646
Join Date: Oct 2002
Chapter/Region: NWIC
Location: Portland, Oregon
Vehicle:
2003 Sleeved 2.5
Oil Dry Sump Goodness

Default

Could be many things but running rough usually means not all cylinders are firing correctly.

Check that injector, if you think it does not look right then it's probably not right.

Check the spark plugs, if they are the 2.5L longer plugs then the ceramic can sometimes crack when installing them specially if they were over torqued. Even if they are new, check them.

Check that you connected the coil over plugs wires the right way. Black plug to the back, white plug to the front.

Check all the injector plugs ensuring they are all seated

Check the 2 big connectors at the side of the engine, if they were sitting for a while then the connectors could be bad. Pluging them in and out a couple of times usually ensures a good connection as well as contactcleaner spray.

If you have TGV's and disconnected the stepper motors or sensors then make sure you re-installed them correctly. You have to insert them, then twist them to install them to ensure the butterfly is open at idle. Trust me, I have seen this many times.
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Old 03-15-2011, 11:17 AM   #4
slowgenius
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Member#: 48350
Join Date: Nov 2003
Chapter/Region: MAIC
Location: Pittsburgh
Vehicle:
04 WRX

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I had the clutch replaced in my car and it ran really rough until i found one of the vaccum lines off going to the boost solenoid.

FYI

James.
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Old 03-15-2011, 05:13 PM   #5
TheYonks
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Member#: 193455
Join Date: Nov 2008
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2004 JBP WRX Wagon
6262'd hybrid motor

Default

Thanks for the advice!, sadly I can't troubleshoot it until friday because the car is in raleigh.

I'm banking on it being a problem with one of the injectors. I did some searching and found a guy who posted in another forum with the exact same problems when he cranked his ej22 build for the first time. He had forgotten to plug up the fuel lines coming out of the engine bay that connect to the metal lines that run along the manifold when he pulled the motor out... a mistake I also made. Some of the gas in the line turned into gunk and clogged the injectors on the driversside. Thats going to be the first thing I'm going to check.
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Old 03-15-2011, 05:34 PM   #6
Csquared33
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Location: Danbury, CT
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93 2JZ something

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its prob running on 3. unplug coilpacks until the idle doesnt change, and you found your dead hole.
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Old 03-18-2011, 04:23 PM   #7
TheYonks
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Member#: 193455
Join Date: Nov 2008
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2004 JBP WRX Wagon
6262'd hybrid motor

Default

Ok, Been troubleshootin it for the past hour. Its getting spark on all cylinders, however I unplugged the injector last in series by the fuel pressure regulator and it didnt make a difference in the idle. I can feel that specific injector tick away when I plug it back and when I checked the spark plug on that cylinder I could smell gas on it so gas is definitely making its way in there but is there enough...., im about to check to see if it has proper fuel pressure at idle.
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Old 03-18-2011, 04:57 PM   #8
TheYonks
Scooby Newbie
 
Member#: 193455
Join Date: Nov 2008
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2004 JBP WRX Wagon
6262'd hybrid motor

Default

its getting slightly above 40 psi of fuel pressur... this thing is baffleing me. it finally threw 2 codes p0171 and p0037, system lean and 02 sensor bank 1 circuit low
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Old 03-18-2011, 06:49 PM   #9
TheYonks
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Member#: 193455
Join Date: Nov 2008
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2004 JBP WRX Wagon
6262'd hybrid motor

Default

I feel dumb... coil packs on pass side were swapped the wrong way... its running like a champ now
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