No Start, 1972 914 will not start |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
No Start, 1972 914 will not start |
Mike1981 |
May 13 2018, 08:13 AM
Post
#1
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
Hello teeners
Looking for some advice please I have a 72 V8 conversion (I Know not a real 14) Really fun to drive I just tried to start it and I do get power to dash and radio but the fule pump cuts out and no crank when I turn the key to the full starting position. The 2 things I have notice 1 Battery was low (Now Charging) 2 No cranking no clicking nothing. 3 Fuel pump cuts out 4 flashers tied to the e-brake keep flashing could it be the e-brake sensor? Clutch sensor/switch? Starter? ignition switch? Checked all relays and fuses I can find All seem good. Thanks Mike |
IronHillRestorations |
May 13 2018, 06:10 PM
Post
#2
|
I. I. R. C. Group: Members Posts: 6,714 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
If you've got a strong battery and feel the starter is OK, pull the spark plugs; maybe you've got a foreign object in a cylinder
|
VaccaRabite |
May 13 2018, 08:00 PM
Post
#3
|
En Garde! Group: Admin Posts: 13,423 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
The starter draws a TON of power. A dead battery won't even pop the soliniod to engage the starter gear, even if you have enough juice to get some of the lights to work for a little while.
Before panicking, make sure the battery has a good charge and try again. Its likely just the battery. Zach |
r_towle |
May 13 2018, 08:25 PM
Post
#4
|
Custom Member Group: Members Posts: 24,564 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
There is no clutch sensor
There is no ebrake sensor. Spring awakening, charge up the battery. |
Mike1981 |
May 14 2018, 03:04 PM
Post
#5
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
Thanks Everyone for your advice.
I measured 12.34 VDC on the battery. Took it up to NAPA. NAPA tested it saying it is still good but is discharged to 56%. I have it on trickle charge 2AMP/hr hope it is the battery. Mike |
Mike1981 |
May 15 2018, 02:54 PM
Post
#6
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
Hello
Charged Battery overnight. It was reading 13.11 volts Re-installed in car nothing no click no crank no sound. Crawled under to the starter 12VDC on main lug Shoved red lead of meter into yellow wire Ignition switch wire I believe Grounded black lead onto door hinge keep Turned the key...no power thru the ignition wire.... is there a relay between the ignition switch in the column and the starter? https://www.facebook.com/photo.php?fbid=222...ype=3&ifg=1 |
Mark Henry |
May 15 2018, 05:26 PM
Post
#7
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
First thing you always do, clean all the grounds, trans strap, all power connections, battery terminals, etc., then go from there.
Flashing E-lights makes me think you have a bad connection somewhere, it can do some funky poop. |
Mike1981 |
May 15 2018, 05:55 PM
Post
#8
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
Good Advice
I will clean battery terminal as well as the ground strap Thanks Mike |
rick 918-S |
May 16 2018, 01:12 PM
Post
#9
|
Hey nice rack! -Celette Group: Members Posts: 20,422 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region |
I am not a believer in the hot start gizmo. Porsche didn't install it. These cars have started as built for years and years. I'm of the camp that a guy should just fix the real problem not add a Rube Goldberg device.
Before you get too concerned and start added stuff the car never had to fix a problem you haven't really discovered check the battery. If the battery is good do the Ed test. Take a set of "good" jumper cables, connect the positive lead to the battery and the positive post on the starter then the ground to the battery then the transaxle. Start the car. If this works change the battery cables. I chased a bad battery cable for a year, intermittent starts, slow cranking to no start condition. Replaced the stock cable that appeared perfect in every way. I would have used it on a concours car. Fixed the problem without adding the mystery problem solver do-dad. |
jcd914 |
May 16 2018, 03:48 PM
Post
#10
|
Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
A stock 72 had a starter interlock relay under the passenger seat that prevented starting the car without seat belts fastened.
Your car is not stock so who knows what has been done with the wiring to the starter. Most car by now have probably had the starter interlock under the passenger seat bypassed. You can check under the passenger seat and see if the yellow and yellow/red wire have been connected together and have a good connection. You can also check for power (12v) on the yellow wire from the ignition switch in start position. As others have said check for ground problems. Jim |
xperu |
May 16 2018, 03:51 PM
Post
#11
|
TEXAS Group: Members Posts: 597 Joined: 13-June 06 From: League City Texas Member No.: 6,213 Region Association: None |
Good Advice I will clean battery terminal as well as the ground strap Thanks Mike Not just the battery ground, but he body ground straps, disconnect the body straps and clean the connection area. Example, the on at the exhaust heat shields area under the rear trunk. I learned this from the forum years ago. Mike |
Mike1981 |
May 19 2018, 07:50 AM
Post
#12
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
Hello
Well I bought a new battery> No crank no start Replacced the ignition switch No crank no start Cleaned battery terminals no luck Next I will begin cleaning all electrical connections with wire brushes. I removed seat to check realy and found this...should it cut the connecton off and jump the 2 wires together? (IMG:http://www.914world.com/bbs2/uploads_offsite/i273.photobucket.com-17663-1526737807.1.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i273.photobucket.com-17663-1526737808.2.jpg) |
rick 918-S |
May 19 2018, 07:02 PM
Post
#13
|
Hey nice rack! -Celette Group: Members Posts: 20,422 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region |
Check the relay board connections.
|
Mike1981 |
May 20 2018, 10:58 AM
Post
#14
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
Hello Everyone
I have been cleaning connectors and checking the realy board. I am getting 12 volts into pin 1 from the ignition switch> Pin 1 and outgoing Pin 6 ohm out with no resistance. However no voltage out of pin 6 Checked all 3 relays (all Working) Scrubbed every connector I could find Any ideas? http://www.914world.com/bbs2/index.php?act...t&id=424733 |
jcd914 |
May 20 2018, 12:05 PM
Post
#15
|
Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
The relay/circuit board in the engine compartment is just a pass through for the started circuit, none of the relays on the board have any impact on the started circuit.
When you are checking for voltage at pin 1 of the 14 pin connector and then again at pin 6 of the 12 pin connector, are the harnesses unplugged or are you back probing the connectors? Some time a connection can be just strong enough to carry the small voltage of an ohm meter but looses connection with more voltage or load. Also some time the physical force of a connector moves thing enough to break a connection. You can also test for voltage at the circuit through the panel by testing at T2 (II) or T4 (IV) of the FI socket on the board, both of them are tied to the same circuit. If you apply power to the wire at pin 6 of the 12 pin connector does the starter crank? Jim |
MarkV |
May 20 2018, 01:07 PM
Post
#16
|
Fear the Jack Stands Group: Members Posts: 1,493 Joined: 15-January 03 From: Sunny Tucson, AZ Member No.: 154 Region Association: None |
Try smacking the starter with a hammer. The solenoid could be stuck or not making a good connection internally. (IMG:style_emoticons/default/smash.gif)
|
Mark Henry |
May 20 2018, 02:40 PM
Post
#17
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Try smacking the starter with a hammer. The solenoid could be stuck or not making a good connection internally. (IMG:style_emoticons/default/smash.gif) He said he has no power to the yellow wire when key is switched to start, so banging it won't help. You have to follow the path and figure out why/where the power stops. It's been years since I did a seat belt interlock, I don't know if that's the issue, but a search on "how to disable the seat belt interlock/buzzer" would give you the instructions and eliminate this point. |
worn |
May 20 2018, 02:52 PM
Post
#18
|
can't remember Group: Members Posts: 3,147 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
I am sorry to tell you now that the seats slide off the rails: you don’t have to unbolt them. Did you disconnect the seat wire or did you find it that way?
|
Mike1981 |
May 20 2018, 04:44 PM
Post
#19
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
The relay/circuit board in the engine compartment is just a pass through for the started circuit, none of the relays on the board have any impact on the started circuit. When you are checking for voltage at pin 1 of the 14 pin connector and then again at pin 6 of the 12 pin connector, are the harnesses unplugged or are you back probing the connectors? Some time a connection can be just strong enough to carry the small voltage of an ohm meter but looses connection with more voltage or load. Also some time the physical force of a connector moves thing enough to break a connection. You can also test for voltage at the circuit through the panel by testing at T2 (II) or T4 (IV) of the FI socket on the board, both of them are tied to the same circuit. If you apply power to the wire at pin 6 of the 12 pin connector does the starter crank? Jim Hello Jim Thanks for the help, I was checking for voltage with the harnesses unplugged. I jambed a wire into the socket pin on the harness and turned the key getting voltage on Pin 1 of the 14 pin connector but no voltage from pin 6 of the 12 pin outgoing connector. I think applying power to pin 6 is a good idea would i connect Plus 12 to pin 6 and the neg terminal to ground? |
Mike1981 |
May 20 2018, 04:45 PM
Post
#20
|
Member Group: Members Posts: 212 Joined: 21-July 14 From: Detroit MI Member No.: 17,663 Region Association: Southern California |
I am sorry to tell you now that the seats slide off the rails: you don’t have to unbolt them. Did you disconnect the seat wire or did you find it that way? Thanks Yes they do slide forward but I was looking for a relay under the seat and needed the room. I found it disconnected I will cut it off and jump the leads together. Thanks |
Lo-Fi Version | Time is now: 25th April 2024 - 09:36 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |