318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Engine

Notices

Engine Tuneups, chips, wires, spark plugs.

.
» Recent Threads
1999 M-Sport For Sale
12-31-2023 05:10 PM
Last post by Coop540iT
03-23-2024 06:39 PM
1 Replies, 96,579 Views
Once again 318ti owner...
03-20-2024 12:39 PM
Last post by two30grain
03-22-2024 02:04 PM
1 Replies, 59,586 Views
What brakes do I...
03-20-2024 03:27 PM
Last post by huirtera
03-20-2024 03:27 PM
0 Replies, 56,913 Views
M50+manual swap bastard...
03-01-2024 11:00 PM
Last post by Andy318
03-18-2024 02:34 PM
3 Replies, 131,957 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 09-20-2015, 12:10 AM   #1
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default P1174 and idle issue

Need a bit of help. Getting a persistent P1174 code and have checked for vacuum leaks replaced SAP plastic crossover pipe that goes from SAP pump to the valve. Cleaned IACV and it moves as freely as it should but I failed smog for a pending P1174 fault. I also have new OEM o2 sensors. So at this point I'm pretty sure it's the CVV. Thus I'll replace that when the replacement arrives.

However, my other issue is the idle, when warm it's close to 1,000 rim at idle and not the normal 700 to 800. But it eventually drops down most of the time but so slow it's bothersome. Was also thinking that could add to the P1174 returning now and again.

Any thoughts on how to resolve all this on my 97 ti?

Sent from my SAMSUNG-SM-P907A using Tapatalk
__________________
01 740iS Cosmos Black
97 318ti Boston Green
99 318ti Titanium Silver
13 X5 3.5XDrive Cosmos Black
97 318ti Alpine White (gone but not forgotten)
88 325iC Schwartz Black (sold)
97 740iL Schwartz Black (sold)
84 633csi Schwartz Black (sold)
96 318ti Alaska Blue (sold)
08 X5 4.8i Titanium Silver (sold)
740isport is offline   Reply With Quote
Old 09-20-2015, 07:51 PM   #2
BRADESTAR
Senior Member
 
Join Date: May 2013
Location: Seattle
Posts: 513
Vehicles
iTrader: (0)
Default

Sounds like vacuum leak.

Have you replaced the rivets on Sap? If any misfire codes, that would help confirm vacuum leak.

If you take the upper mani off you can inspect vacuum lines. Brake cleaner leak check might be worth a go too.
BRADESTAR is offline   Reply With Quote
Old 09-20-2015, 09:34 PM   #3
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

No vacuum leaks found with propane or brake cleaner. No leaks on SAP ether and not a single misfire or code beyond the P1174.

Sent from my SAMSUNG-SM-G925A using Tapatalk
__________________
01 740iS Cosmos Black
97 318ti Boston Green
99 318ti Titanium Silver
13 X5 3.5XDrive Cosmos Black
97 318ti Alpine White (gone but not forgotten)
88 325iC Schwartz Black (sold)
97 740iL Schwartz Black (sold)
84 633csi Schwartz Black (sold)
96 318ti Alaska Blue (sold)
08 X5 4.8i Titanium Silver (sold)
740isport is offline   Reply With Quote
Old 09-26-2015, 08:20 PM   #4
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

Cleaned up the IACV, replaced the CCV and P1174 appears gone. But idle is still very high and now just got a code of P0505. Most everything I've read says it's the IACV needs replacing, but I am just not sure. I do know that the idle when warmed up fully is still way to high.

Thoughts?
740isport is offline   Reply With Quote
Old 10-26-2015, 01:33 PM   #5
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

I think i finally got it. Though all of my normal ways of tracking down a vacuum leak didn't work, turns out that is what it was. Or at least appears to be. Used Berrymans Chemtool this time sprayed around and found nothing wrong. Then sprayed around injector #4 and the engine stumbled. Did it a few times and the same occurred. Initially hoped that the rebuild of the vacuum tree was the cause as I used fuel line and ordered a replacement tree assembly from AutohausAZ.com and pulled the upper intake and replaced the tree. Re-assembled and still the same stumble. So removed the intake again and removed the injectors and low and behold, #3 AND #4 lower o-rings were hard as rocks. Replaced all four to be safe, a little dielectric grease and reassembled.

Got her started, perfect idle and no more leaks! So if the CEL stays off for the week, I should be able to get her to pass smog on Saturday morning!
740isport is offline   Reply With Quote
Old 10-28-2015, 03:42 PM   #6
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

Another update: as you have read above, I had P0505 and P1174 codes and after a lot of tracing, replaced the ICV and CCV, finally found that injector 4 was having a problem sealing. Removed the fuel rail, then injectors and found the O-rings on 3 and 4 were hard as rocks. Replaced the O-rings and the vacuum tree and all is well thus far and so far no codes have returned.

However, the issue that is happening (this is an automatic too) that when slowing to a stop the engine surges and then returns to normal idle. I cannot seem to find anything that can be the cause. All vacuum lines appear okay and it runs great, but this surge is a pain in the butt.

Any insight is greatly appreciated.
740isport is offline   Reply With Quote
Old 10-28-2015, 06:09 PM   #7
30yrMbr
Senior Member
 
30yrMbr's Avatar
 
Join Date: Feb 2005
Location: Laguna Beach
Posts: 357
Vehicles
iTrader: (3)
Default

Try shifting to neutral at stop and see if that changes the issue. My daughters 318i automatic does this. At a stop light it will stumble then surge, seems to be related to the a/c kicking in, but not positive about that.

When I get to a stop and shift into neutral, the stumble/surge doesn't happen, in Drive it will do so.
Go figure.
__________________
1996 ///M 318ti
Alaska Blue, M-Technic, Chip, Stromung catback, 17" BMW Ltw Wheels, B&M SSK, H&R Springs/Bilsteins, StopTech Brake Lines;

http://www.318ti.org/gallery/data/54...27_clipped.jpg
30yrMbr is offline   Reply With Quote
Old 10-28-2015, 10:03 PM   #8
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

Don't have the stumble happening and whether A/C is on or not still does the surge. I'll see what happens coming to a stop in neutral, but still want to find the cause/solution.

Anyone think the DISA valve could be the issue? Shouldn't be any concern during idle, as that is not what it is there for.
740isport is offline   Reply With Quote
Old 10-30-2015, 01:48 PM   #9
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

Anyone? I know we can live with it and again, hopefully passes smog tomorrow (if the CEL or any codes don't return) but, still, would like to have it gone.
740isport is offline   Reply With Quote
Old 10-31-2015, 07:01 PM   #10
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

Dammit!! P1174 AGAIN! I'm completely stumpted. I've even replaced the throttle position sensor and can't find a leak anywhere. WTH!! Anyone have any idea?

Sent from my SAMSUNG-SM-G925A using Tapatalk
__________________
01 740iS Cosmos Black
97 318ti Boston Green
99 318ti Titanium Silver
13 X5 3.5XDrive Cosmos Black
97 318ti Alpine White (gone but not forgotten)
88 325iC Schwartz Black (sold)
97 740iL Schwartz Black (sold)
84 633csi Schwartz Black (sold)
96 318ti Alaska Blue (sold)
08 X5 4.8i Titanium Silver (sold)
740isport is offline   Reply With Quote
Old 11-01-2015, 08:54 PM   #11
BlackBMWs
Senior Member
 
BlackBMWs's Avatar
 
Join Date: Feb 2012
Location: Sacramento, CA
Posts: 2,451
Vehicles
iTrader: (7)
Default

David, could you have a bad injector? Do you have your old ones to swap back in?
__________________


1998 318ti Sport - "Cali" Schwartz II/Schwartz sport interior, Cali top
1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52
1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior
1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior

Other Current Bimmers: 2006 530i / 2000 2.3L Z3 / 1997 1.9L Z3 / 1999 540it

1997 318ti Sport - "Huera" - RIP
1995 318ti Active - RIP
1995 318ti Sport - "Tiny" Sold
1994 325i Sedan - "Jade" - Sold
1991 318ic - "Bert" - Sold
1985 635csi sold
1984 533i "Max" Sold
1984 318i sold

BMWCCA #160411

SUPPORT 318ti.org! CLICK THE LINK ABOVE!
Hosting a forum like this is not free. 318ti.org is one of the best BMW forums on the web because it is member supported, not vendor supported. The cost to become a Supporter is a nominal $10.00... A YEAR! DO IT! NOW!
BlackBMWs is offline   Reply With Quote
Old 11-02-2015, 12:12 AM   #12
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

Yes I do still have them. I'm heading out now on a business trip and try that when I return. Thanks

Sent from my SAMSUNG-SM-G925A using Tapatalk
__________________
01 740iS Cosmos Black
97 318ti Boston Green
99 318ti Titanium Silver
13 X5 3.5XDrive Cosmos Black
97 318ti Alpine White (gone but not forgotten)
88 325iC Schwartz Black (sold)
97 740iL Schwartz Black (sold)
84 633csi Schwartz Black (sold)
96 318ti Alaska Blue (sold)
08 X5 4.8i Titanium Silver (sold)
740isport is offline   Reply With Quote
Old 11-10-2015, 10:13 PM   #13
BlackBMWs
Senior Member
 
BlackBMWs's Avatar
 
Join Date: Feb 2012
Location: Sacramento, CA
Posts: 2,451
Vehicles
iTrader: (7)
Default

Any update?


Sent from my iPhone using Tapatalk
__________________


1998 318ti Sport - "Cali" Schwartz II/Schwartz sport interior, Cali top
1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52
1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior
1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior

Other Current Bimmers: 2006 530i / 2000 2.3L Z3 / 1997 1.9L Z3 / 1999 540it

1997 318ti Sport - "Huera" - RIP
1995 318ti Active - RIP
1995 318ti Sport - "Tiny" Sold
1994 325i Sedan - "Jade" - Sold
1991 318ic - "Bert" - Sold
1985 635csi sold
1984 533i "Max" Sold
1984 318i sold

BMWCCA #160411

SUPPORT 318ti.org! CLICK THE LINK ABOVE!
Hosting a forum like this is not free. 318ti.org is one of the best BMW forums on the web because it is member supported, not vendor supported. The cost to become a Supporter is a nominal $10.00... A YEAR! DO IT! NOW!
BlackBMWs is offline   Reply With Quote
Old 11-10-2015, 10:35 PM   #14
740isport
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 315
iTrader: (1)
Default

Didn't get a chance to work on it over the weekend. Didn't arrive back from my business trip until last night. Hopefully going to be able to get at it this weekend.
740isport is offline   Reply With Quote
Old 11-10-2015, 10:37 PM   #15
BlackBMWs
Senior Member
 
BlackBMWs's Avatar
 
Join Date: Feb 2012
Location: Sacramento, CA
Posts: 2,451
Vehicles
iTrader: (7)
Default

Same here with knock sensor engine codes. Do the knock sensors fail?


Sent from my iPhone using Tapatalk
__________________


1998 318ti Sport - "Cali" Schwartz II/Schwartz sport interior, Cali top
1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52
1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior
1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior

Other Current Bimmers: 2006 530i / 2000 2.3L Z3 / 1997 1.9L Z3 / 1999 540it

1997 318ti Sport - "Huera" - RIP
1995 318ti Active - RIP
1995 318ti Sport - "Tiny" Sold
1994 325i Sedan - "Jade" - Sold
1991 318ic - "Bert" - Sold
1985 635csi sold
1984 533i "Max" Sold
1984 318i sold

BMWCCA #160411

SUPPORT 318ti.org! CLICK THE LINK ABOVE!
Hosting a forum like this is not free. 318ti.org is one of the best BMW forums on the web because it is member supported, not vendor supported. The cost to become a Supporter is a nominal $10.00... A YEAR! DO IT! NOW!
BlackBMWs is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough idle even after new PCV leeko617 Engine 11 07-29-2015 05:56 PM


All times are GMT +1. The time now is 01:03 PM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2024, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 124.36 k/148.11 k (16.04%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.