 D-Jet Cold Start Valve?, Not Shooting Fuel (Engine Won't 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. |
|
|
  |
| Angelface01 |
 May 27 2005, 03:15 PM
Post
#1
|
|
Newbie  Group: Members Posts: 36 Joined: 13-August 04 From: Pottstown, PA Member No.: 2,527  |
So I have this 1.7 engine that I'm trying to start for the first time in 10+ years. I have spark and all four injectors work but the cold start valve isn't shootong fuel. The engine was converted to carbs in it's past lifetime and now is being converted back to fuel injection. The right side head is not tapped for a temp sensor. Will the cold start valve work if there is no temp sensor in the head to tell it that the engine is cold? Please Help me!! (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)
|
   |
 
|
| Allan |
May 27 2005, 03:17 PM
Post
#2
|
|
Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
I thought the cold start valve didn't even work unless the temp was 40 degrees or so. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)
|
|
|
|
| Air_Cooled_Nut |
May 27 2005, 03:39 PM
Post
#3
|
|
914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
You need the cold start temp. switch and that is different from the head temp. sensor. The cold start injector gets its power from the starter (terminal #50) and it's the temp. switch that completes the circuit when it grounds (below 50ºF).
Also, you need to have wire #18 from the ECU connect to the same terminal on the starter (#50). This will help start-ups even when the cold start injector is not enabled. BTDT (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) |
|
|
|
| brant |
May 27 2005, 03:55 PM
Post
#4
|
|
914 Wizard Group: Members Posts: 11,622 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
|
I was surprised at how cold the temp had to be to get the cold start valve activated...
I think its much closer to 30 degrees F, than 40. basically unless its freezing out the cold start will have no effect. And since its summer, I doubt this is your problem. brant |
 |
|
| Bleyseng |
May 27 2005, 04:05 PM
Post
#5
|
|
Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
not having a CHT will cause you problems
|
|
|
|
| type47 |
May 27 2005, 04:56 PM
Post
#6
|
|
Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
re: the missing CHT sensor. i believe it is needed to basically run, not just run right. maybe you could fool the ECU by hooking up an external resistor to the CHT terminal and adjust as the engine warms up. sounds like the engine is in the car? major PIA to drop engine, change head (find head, rebuild head, install CHT, install head, bolt everything back together, put engine back in car). if i remember, CHT is in the 0-2000 ohm range. maybe that would at least get it running.
|
|
|
|
| Air_Cooled_Nut |
May 27 2005, 05:12 PM
Post
#7
|
||
|
914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
Depends upon the type of temp. switch used. Early models: 5ºF (-15ºC) or colder Late models: Between 50ºF - 32ºF (10ºC - 0ºC) or colder So for late models the switching temp. will be somewhere between the given values. At that temp. or colder the switch will ground. For my Type 3 VW the switching temp. is 45ºF. |
||
|
|
|
||
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 8th May 2024 - 02:16 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.