318ti.org forum

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


Engine Tuneups, chips, wires, spark plugs.

» Recent Threads
'95 Boston Green, ALL...
06-29-2021 04:24 PM
Last post by FunElan
Today 12:03 AM
9 Replies, 2,713 Views
New to the group
05-30-2021 05:47 AM
Last post by FunElan
Today 12:02 AM
4 Replies, 1,998 Views
What model ti do you own?
02-26-2003 03:40 AM
Last post by sarinasr75
Yesterday 02:40 PM
340 Replies, 172,544 Views
Longtime lurker via...
Yesterday 07:33 AM
Last post by primo107
Yesterday 07:33 AM
0 Replies, 88 Views
Happy Birthday ...
Yesterday 05:00 AM
Last post by 1996 328ti
Yesterday 05:00 AM
0 Replies, 78 Views
WTB: 318ti clubsport in...
05-21-2021 02:08 PM
Last post by jasminemicheal
07-23-2021 11:55 AM
6 Replies, 2,644 Views
WTB: Manual 318ti
05-17-2021 09:34 PM
Last post by jasminemicheal
07-23-2021 11:54 AM
3 Replies, 2,492 Views
WTB: M-Tech molding
06-25-2021 02:07 AM
Last post by jasminemicheal
07-23-2021 11:54 AM
3 Replies, 3,772 Views
07-23-2021 11:53 AM
Last post by jasminemicheal
07-23-2021 11:53 AM
0 Replies, 99 Views
BMW type 32 alloy wheels...
07-22-2021 02:41 AM
Last post by old_sports_cars
07-22-2021 02:41 AM
0 Replies, 296 Views
Reply Share/Bookmark
Thread Tools Display Modes
Old 04-17-2021, 08:51 PM   #1
Junior Member
Join Date: Jun 2019
Location: Colorado
Posts: 6
iTrader: (0)
Default No start - "weak" spark, no codes, new crank position sensor

Hey all, A month or so ago when I tried starting my '98 ti, it fired a few times then nothing but crank. No codes were thrown. I've tried the following so far:

1. I sprayed carb cleaner into the throttle body, no difference.
2. Tested plug #1 and no spark
3. Checked DCM compartment, dry as a bone
4. Replaced the coil pack, no difference, returned it.
5. Replaced the crank position sensor (VNE, NOT genuine BMW); cranks but doesn't fire (my poor flayed hands )
6. Tested plug #1 today and recorded it (below)- it sparks brightly every few seconds but that's it - car still cranks but doesn't fire.

From what I understand, since it's sparking it's not the computer. What should I try next? Test the relays? Test fuel pressure? Compression test? Test the fuel pump? I can turn wrenches but I'm not much good with testing electronics.

I'm confused as to the change in sparking with no improvement after replacing the CPS unless the CPS and something else went bad simultaneously (or the CPS is junk). Any help is appreciated!

https://youtu.be/csHCHoFygQw">https://youtu.be/csHCHoFygQw" type="application/x-shockwave-flash" width="425" height="350">
tiRally is offline   Reply With Quote
Old 04-19-2021, 02:19 AM   #2
J!m's Avatar
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,046
iTrader: (1)

Check for corroded ground leads.

If it’s not simple, you have to go back to ground zero and check everything...
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote


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
Error Code List - Stomp Test OBD1 biorjin Engine 28 02-08-2011 01:21 AM
Crankshaft position sensor netn3gro Maintenance 1 03-05-2007 12:54 AM
95 ti wont start or crank wctouring7 Electrical 11 12-23-2006 10:14 AM
Help! Have spark, Have fuel, NO START fat-ti Lounge 13 10-30-2006 05:30 AM
error code list biorjin Exhausts 0 10-10-2005 01:55 AM

All times are GMT +1. The time now is 12:52 AM.

Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2021, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 69.02 k/79.67 k (13.36%)]

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