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Old 02-18-2014, 02:53 PM   #1
scoobirex
Scooby Newbie
 
Member#: 38275
Join Date: Jun 2003
Chapter/Region: RMIC
Location: Subaruville, CO/Funabashi JP
Vehicle:
2002 V7 207/V9 6-spd
M7760 e85 PSM

Default V7 EJ207 - Halech - cam position sensors

Car: 2002 WRX
Relevant Mods: V7 Ej207, IA Performance AVCS wiring, Haltech PnP EMS, e85.


I have had the swap done for a couple years now with the matching JDM ECU and all was well on a street-able tune on 91 octane done by my friendly, and knowledgeable local tuner. I made the switch to e85 using Haltech's plug and play ECU. The tune put on my car has been killer and has made the vehicle a completely different driving machine. Gains of 50+ who and a bunch of extra drivability under the curve were simply astonishing with just a switch in fuel.

Although I have come across really difficult cold start issues (not my main issue), i am now getting DTCs for cam position sensors on both banks. AVCS appears to be working in my data logs however I may have a couple bad sensors or maybe a bad solenoid.

Another thing is that my car randomly shuts down in the middle of cruising (not specific to any one part of the rev range). Sometimes all i have to do leave the car in gear and turn the motor off and then back on quickly and it starts right up. Sometimes, i have to kick the clutch to get it to start again, but most of the time I have to pull over to the side of the road and try to crank my car a few times before it starts up. This may happen upwards of a few times during a cruise from Denver (elevation 5280') to my house (elevation 8600'). I have not been able to log this because it seems to only happen when I don't have my laptop in my car.

Questions: Would the aftermarket AVCS wiring harness have a problem communicating with the Haltech computer? Do you gurus think that I may have to change my cam position sensors or make an adjustment to them?

I am on a waiting list to bring my car down to my tuner on March 10. I believe that he will be able to solve these issues, but I want to try to remove as many variables as possible. Thank you all for reading and helping and please ask me questions as I know I haven't been too specific.

-Gen
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Old 02-19-2014, 04:53 PM   #2
misfitsfreak81
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Member#: 346751
Join Date: Feb 2013
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Go see Harvey at The Boostcreep in Longmont (?) he will get you rolling again in no time!
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Old 02-19-2014, 06:00 PM   #3
scoobirex
Scooby Newbie
 
Member#: 38275
Join Date: Jun 2003
Chapter/Region: RMIC
Location: Subaruville, CO/Funabashi JP
Vehicle:
2002 V7 207/V9 6-spd
M7760 e85 PSM

Default

Quote:
Originally Posted by misfitsfreak81 View Post
Go see Harvey at The Boostcreep in Longmont (?) he will get you rolling again in no time!
I have an appointment with him on March 10th. I just wanted to reduce the number of variables before I saw him. He will also be installing my flex fuel sensor as well at that time.

I guess I'm wondering if I should replace all of my sensors or wait until he puts it on an oscilloscope.

-Gen
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Old 02-20-2014, 10:46 AM   #4
misfitsfreak81
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Join Date: Feb 2013
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I'd wait till he looks at it. No need to replace sensors that are likely still good.
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Old 02-20-2014, 05:29 PM   #5
Geek Guy
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Member#: 8151
Join Date: Jul 2001
Chapter/Region: South East
Location: Rally Tools LLC
Vehicle:
2002 WRX Rally Car
NASA Rallysport, yo!

Default

I'm assuming you have properly shielded wiring for the AVCS and crank sensors?
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Old 03-25-2014, 12:14 PM   #6
scoobirex
Scooby Newbie
 
Member#: 38275
Join Date: Jun 2003
Chapter/Region: RMIC
Location: Subaruville, CO/Funabashi JP
Vehicle:
2002 V7 207/V9 6-spd
M7760 e85 PSM

Default

I will have my car retuned and checked the first week of April to see what is going on. All sensors have been replaced but the rough start-ups are still an issue. After my mechanics took a deep look into everything (IAP wiring loom, sensors etc), the car checks out. They unplugged the AVCS wiring harness from the cam position sensors and now the car starts on the first time and continues to run. Anyone else think that that is bizarre?
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