318ti.org forum

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

Notices

Engine Tuneups, chips, wires, spark plugs.

.
» Recent Threads
BC Racing Coilover...
07-17-2012 07:23 AM
Last post by Jimmie G.
Yesterday 06:55 PM
50 Replies, 39,812 Views
1996 318ti Part Out
09-13-2018 07:43 PM
Last post by Estii
Yesterday 04:53 AM
8 Replies, 1,122 Views
warm engine start...
04-12-2011 05:23 PM
Last post by Estii
09-23-2018 11:11 PM
67 Replies, 13,124 Views
Manual Adjustment of...
09-20-2018 09:05 AM
Last post by John Firestone
09-23-2018 08:42 AM
3 Replies, 476 Views
Happy Birthday black98,...
09-23-2018 05:00 AM
Last post by 1996 328ti
09-23-2018 05:00 AM
0 Replies, 151 Views
FS: 1998 Black BMW 318ti...
10-29-2016 06:52 AM
Last post by port
09-22-2018 09:18 PM
10 Replies, 8,217 Views
The 318ti OBD-II engine...
10-19-2006 06:48 PM
Last post by HeelAndToe85
09-21-2018 07:53 PM
118 Replies, 76,658 Views
OEM roof spoiler
06-14-2018 12:19 AM
Last post by sortasorted
09-21-2018 06:54 AM
11 Replies, 2,491 Views
Happy Birthday Berni
09-20-2018 05:00 AM
Last post by 1996 328ti
09-20-2018 05:00 AM
0 Replies, 254 Views
M52 Swap Questions
07-01-2018 05:06 PM
Last post by Projectvoltron
09-20-2018 03:59 AM
18 Replies, 2,804 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 03-13-2018, 09:22 PM   #1
sirius815
Member
 
Join Date: Dec 2017
Location: NoVA
Posts: 47
iTrader: (0)
Default Another crank, no start issue..

Hopefully someone can help me out and see if I missed anything.

History: Car had numerous oil leaks all around the engine. Pretty much everything was taken off the engine, cleaned, and replaced/reinstalled. New knock sensors were installed. ASC was deleted, but ASC throttle body TPS and cable motor are attached.

Problem: Car will crank, but not start.

Troubleshooting: Battery is in good condition. Starter obviously works. The DME relay is operational and upon activation supplies power to fuel pump relay. Fuel pump relay itself works, fuel pump works (bypassed relay), but the relay is not being activated by DME. Tried to start car while bypassing fuel pump relay - no good. Crank position sensor tested good (560ohms). Cam position sensor untested, but car ran fine before. I checked spark on #1 cylinder - it is present.

Things not tested: Injector signal, cam position sensor. Assuming coil pack is good - Spark plugs are new.

I am getting an ADS cable in tomorrow to see if the EWS/DME went out of sync. Maybe the DME is trashed - in which case I'd need a new one and sync the EWS to it...

Anybody?
sirius815 is offline   Reply With Quote
Old 03-15-2018, 09:39 PM   #2
sirius815
Member
 
Join Date: Dec 2017
Location: NoVA
Posts: 47
iTrader: (0)
Default

Got mine solved - ended up being the d@mn cam sensor!
sirius815 is offline   Reply With Quote
Old 03-29-2018, 02:34 AM   #3
Frach23
Junior Member
 
Join Date: Mar 2018
Location: Canada
Posts: 6
Vehicles
iTrader: (0)
Default

Having the same issue with my '96 ti... when I turn the key into the 2nd position I cannot hear the fuel pump prime, but I replaced the relay and it is working. And if I'm correct the DME controls the fuel pump relay and if it isn't receiving signal from all systems it won't send power to the pump. Now im chasing what could not be sending a signal.
Frach23 is offline   Reply With Quote
Old 03-29-2018, 12:19 PM   #4
sirius815
Member
 
Join Date: Dec 2017
Location: NoVA
Posts: 47
iTrader: (0)
Default

There are more things than that going on. Check for spark - if you are receiving spark, then it is NOT a EWS issue. If you have no spark, then its EWS. In rare cases I have read that the DME can loose the EWS key which is an easy fix if you have the cables and software. I ended up getting the cables and software, along with INPA and it's been a blessing as I was able to confirm the fuel pump will turn on via DME and pulse all injectors. It's possible you have a cam or crank position sensor issue.

Check the wiring diagrams as well. Sitting beside the fuel pump relay is the DME relay. It will provide signal power to the relay (the DME provides ground). Power is always on if I remember right.

One thing you can try is to bypass the fuel pump relay with a jumper to turn on the fuel pump and then try to start the car. This will confirm two things - 1) the fuel pump is definitely receiving power at the pump, and 2) if it starts, you have a problem within the fuel pump circuit.
sirius815 is offline   Reply With Quote
Old 03-29-2018, 02:53 PM   #5
Frach23
Junior Member
 
Join Date: Mar 2018
Location: Canada
Posts: 6
Vehicles
iTrader: (0)
Default

Thanks for the repsonse. I’ve bypassed the fuel pump relay and put power directly to the fuel pump to test and the car did start. So I believe it is in the wiring somewhere as I have changed the cam sensor and both DME and fuel pump relays. Still doesn’t make sense of the check engine light though. I’ve scanned it and nothing has come up so i’m thinking the ECU just needs a hard reset.
Frach23 is offline   Reply With Quote
Old 03-29-2018, 04:00 PM   #6
sirius815
Member
 
Join Date: Dec 2017
Location: NoVA
Posts: 47
iTrader: (0)
Default

So, do you have a CEL or not?

Double check the DME relay that sits beside the fuel pump relay, then check the wiring diagrams. If you don't have experience with reading schematics and electrical troubleshooting, I can try to help.

Sent from my Nexus 6 using Tapatalk
sirius815 is offline   Reply With Quote
Old 03-29-2018, 04:16 PM   #7
Frach23
Junior Member
 
Join Date: Mar 2018
Location: Canada
Posts: 6
Vehicles
iTrader: (0)
Default

I do have a CEL, but I don’t know what clould be sending it. I changed the DME relay but I will go through the fuel pump wiring diagram later on today.
Frach23 is offline   Reply With Quote
Old 03-29-2018, 04:42 PM   #8
sirius815
Member
 
Join Date: Dec 2017
Location: NoVA
Posts: 47
iTrader: (0)
Default

Do you know what the code is? It may not be the fuel pump wiring.

Sent from my Nexus 6 using Tapatalk
sirius815 is offline   Reply With Quote
Old 03-30-2018, 02:13 AM   #9
Frach23
Junior Member
 
Join Date: Mar 2018
Location: Canada
Posts: 6
Vehicles
iTrader: (0)
Default

Nope, put 2 scanners on it and none of them are pulling a code. I think it may have been from the cam sensor before I changed it and now that i’ve changed it, it hasn’t reset. But who knows.
Frach23 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
Crank but no start, HELP! Steez Engine 4 07-07-2018 03:06 PM
Help - Gauges inaccurate readings, Crank no Start issue Rudenice Electrical 0 01-02-2017 04:51 PM
Warm Start Intermittent Issue Haunted_Smores Maintenance 0 06-18-2016 05:49 AM
Ignition Start Crank Key Issue DanOx Engine 1 01-09-2012 05:46 AM
Curious won't start issue fastworker Misc 0 12-21-2009 09:52 PM


All times are GMT +1. The time now is 11:42 AM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2018, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 97.89 k/115.48 k (15.23%)]

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