Welcome to the North American Subaru Impreza Owners Club Sunday August 19, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 07-18-2018, 01:19 AM   #1
grey wolf
Scooby Newbie
 
Member#: 465431
Join Date: Apr 2017
Chapter/Region: VIC
Location: Vancouver
Vehicle:
2002 JDM V7 STI
WRB

Default extended crank time

I have a 2002 STI from Japan, so it is the EJ207 V7 engine. Recently, I installed the Perrin turbo inlet and replaced my injectors with a set of "remanufactured" pink injectors (big mistake, but keep reading...). Anyway, the car has always started up right away, and even with the remanufactured injectors, it was still starting up just fine. It ran very badly with those injectors, so I had my originals properly serviced and re-installed them yesterday. Now the car is running great! Better than ever actually, but there's just one problem. I am experiencing extended crank times while starting the engine now.

I should mention, during all that work, I found both my rear cam position sensors had oil in the connectors, so I ordered two new ones. I only got one so far, so I replaced it, but I'm still waiting for the other one to show up.

I don't think it is an injector problem, since the engine runs great, and the shop that did the electrical testing and ultrasonic cleaning on the injectors says they are working perfectly. Do you guys think it is possible that it has something to do with the cam position sensors? Maybe now that one is definitely getting a good signal, and the other may or may not be getting a bad signal (due to the oil in the connector). I guess there's always a chance that it is a totally unrelated problem that just happened to reveal itself after I worked on the car this last time. Anything is possible.

Anyway, let me know your questions and comments. I'd like to figure this thing out.
* Registered users of the site do not see these ads.
grey wolf is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-22-2018, 02:40 AM   #2
grey wolf
Scooby Newbie
 
Member#: 465431
Join Date: Apr 2017
Chapter/Region: VIC
Location: Vancouver
Vehicle:
2002 JDM V7 STI
WRB

Default

More info:

Got both the rear cam position sensors replaced now, but now that I think of it, this can't really be the problem. As far as I can tell, these aren't used to tell the ECU the cylinder position when cranking to start the engine, they are only for AVCS function.

Anyway, the extended cranking time only seems to happen on cold starts. If I restart the engine a few minutes after shutting it off, it starts right up every time, like it used to. I thought maybe fuel pressure was bleeding off, but even if I cycle the ignition a few times before a cold start, it still cranks for a while before the engine actually starts, so i don't think it's a fuel supply problem.

I checked the crank position sensor connector for oil, looks dry. I have no access to an oscilloscope to measure waveform output from any sensors, but since the engine runs great other than this starting problem, I assume it is working properly. Also, the front cam sensor connector is also dry.

Still stumped. Anyone have any ideas?
grey wolf is offline   Reply With Quote
Old 07-23-2018, 10:40 AM   #3
Samurai Jack
Scooby Guru
 
Member#: 21145
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Not in my own time
Vehicle:
2002 Enemy of Aku

Default

I'm thinking bad starter, bad battery and/or bad battery connections
Samurai Jack is offline   Reply With Quote
Old 07-24-2018, 12:22 AM   #4
best1
Scooby Newbie
 
Member#: 268495
Join Date: Dec 2010
Default

Quote:
Originally Posted by Samurai Jack View Post
I'm thinking bad starter, bad battery and/or bad battery connections


Iím having this very same issue with my Ej207 v7. It would never crank on the first, always on the second but it still took like 3 sec. I had times where it wouldnít crank at all , and boosted it to start, but the batt and alternator had good voltage. Always on the cold starts. Finally a Subie specialist told me when it happens and it doesnít crank, tap the starter with a screw driver and hammer. So I did that and it started up. Looks like itís a bad starter problem. My suggestion to you would be if it gets worse and it doesnít crank at all, tap the starter and see if it starts. If it does then you could have a bad starter. I am getting a starter for mine. 🤞🏽that will solve the extended crank issue
best1 is offline   Reply With Quote
Old 07-24-2018, 11:34 PM   #5
grey wolf
Scooby Newbie
 
Member#: 465431
Join Date: Apr 2017
Chapter/Region: VIC
Location: Vancouver
Vehicle:
2002 JDM V7 STI
WRB

Default

Thanks guys, but the starter is working normally, battery is in excellent condition, and the battery terminals are also clean and tight. The problem isn't the starter turning over the engine (cranking), the problem is that the starter turns the engine for too long before the engine runs under its own power. The starter is also turning the engine over at the right speed, it's not cranking slowly or anything like that.
grey wolf is offline   Reply With Quote
Old 07-25-2018, 08:02 AM   #6
Samurai Jack
Scooby Guru
 
Member#: 21145
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Not in my own time
Vehicle:
2002 Enemy of Aku

Default

Quote:
Originally Posted by best1 View Post
Iím having this very same issue with my Ej207 v7.
... I am getting a starter for mine. that will solve the extended crank issue
Make sure you do not get an auto parts store house brand starter. They fail quickly.
Get yourself a Denso. Worth the extra cash.
You can use the same starter as the 2002 WRX starter.
Samurai Jack is offline   Reply With Quote
Old 07-25-2018, 08:06 AM   #7
Samurai Jack
Scooby Guru
 
Member#: 21145
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Not in my own time
Vehicle:
2002 Enemy of Aku

Default

Quote:
Originally Posted by grey wolf View Post
The starter is also turning the engine over at the right speed, it's not cranking slowly or anything like that.
Actually, you could have a bad starter. Mine was like that but the starter was actually bad. It just had an abnormally long crank time before the motor would start.

I went through the same thing. Checked/cleaned all battery and starter connections, as well as alternator connections.
No change.

I replaced the battery cables.
No change.

I replaced the battery.
No change.

Once I replaced the starter, problem went away.
Samurai Jack is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 05:41 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.