So I think I have vapor lock, what is it like? |
|
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. |
|
So I think I have vapor lock, what is it like? |
oldschool |
Feb 12 2014, 10:33 PM
Post
#1
|
Advanced Member Group: Members Posts: 3,362 Joined: 29-October 08 From: P-town Member No.: 9,705 Region Association: Southern California |
Can Vapor lock happen even while your at a stop light?
I made a few stops today and every time I tried starting my car it just took longer to fire? and when it did, it died down the street at a light. (IMG:style_emoticons/default/confused24.gif) |
JStroud |
Feb 12 2014, 11:04 PM
Post
#2
|
Senior Member Group: Members Posts: 1,463 Joined: 15-January 11 From: Galt, California Member No.: 12,594 Region Association: Northern California |
When I was on my trip last year my car vapor locked at least 8 times....three times while sitting at a stop light, five times died while driving at slow speed.
Mostly after freeway driving then getting stuck in stop and go traffic in town, but then it was 100+ each time. Not fun though, so during my conversion the new fuel pump is going up front. Jeff |
oldschool |
Feb 12 2014, 11:45 PM
Post
#3
|
Advanced Member Group: Members Posts: 3,362 Joined: 29-October 08 From: P-town Member No.: 9,705 Region Association: Southern California |
When I was on my trip last year my car vapor locked at least 8 times....three times while sitting at a stop light, five times died while driving at slow speed. Mostly after freeway driving then getting stuck in stop and go traffic in town, but then it was 100+ each time. Not fun though, so during my conversion the new fuel pump is going up front. Jeff Yeah it never did it before I wonder what changed (IMG:style_emoticons/default/confused24.gif) I don't have the HE hook up to the heater valves could that be a problem? |
Dave_Darling |
Feb 13 2014, 12:00 AM
Post
#4
|
914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
I've only had it happen once in a couple of decades of driving. That was going through the Desert in 100+ degree temps up a long hill.
I think it is more likely to be a mixture problem of some kind than vapor lock. --DD |
KELTY360 |
Feb 13 2014, 12:09 AM
Post
#5
|
914 Neferati Group: Members Posts: 5,036 Joined: 31-December 05 From: Pt. Townsend, WA Member No.: 5,344 Region Association: Pacific Northwest |
Maybe your fuel pump is dying.
|
Elliot Cannon |
Feb 13 2014, 12:27 AM
Post
#6
|
914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
My fuel pump has been in the back for 10 years. What is vapor lock??
|
euro911 |
Feb 13 2014, 02:31 AM
Post
#7
|
Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California |
Check your fuel filter(s), Jaime.
|
oldschool |
Feb 13 2014, 10:34 AM
Post
#8
|
Advanced Member Group: Members Posts: 3,362 Joined: 29-October 08 From: P-town Member No.: 9,705 Region Association: Southern California |
The kid is coming over today to check it out. News at 11 (IMG:style_emoticons/default/blink.gif)
btw its 1973 2.0 FI |
SLITS |
Feb 13 2014, 12:05 PM
Post
#9
|
"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
There was this blond that married a truck driver ...
On their wedding night, he demanded she get on her knees and blow the meat whistle .... When nothing came of it, he declared he must be vapor locked ... That's what it is like. |
JawjaPorsche |
Feb 13 2014, 02:19 PM
Post
#10
|
Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
My first vapor lock was in the desert in 100+ heat then it just vapor lock at red lights, while driving, etc.
Moved my fuel pump to the firewall 20 years ago and it has never vapor lock since! (IMG:style_emoticons/default/beerchug.gif) Attached image(s) |
'73-914kid |
Feb 13 2014, 02:20 PM
Post
#11
|
Senior Member Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California |
Jaime's possible vapor lock issue is something unique I think. He doesn't have heater valves on his heat exchangers, but they're hooked up to the fan shroud, so it hot air directly from the heat exhcuangers is being dumped directly onto the fuel pump..
|
JawjaPorsche |
Feb 13 2014, 02:24 PM
Post
#12
|
Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
Jaime's possible vapor lock issue is something unique I think. He doesn't have heater valves on his heat exchangers, but they're hooked up to the fan shroud, so it hot air directly from the heat exhcuangers is being dumped directly onto the fuel pump.. He said it does it a lot at red lights. No air moving except hot air from exchangers. Not good! (IMG:style_emoticons/default/sad.gif) |
'73-914kid |
Feb 13 2014, 03:05 PM
Post
#13
|
Senior Member Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California |
Oh, and we started the car this morning with no issue..
|
914_teener |
Feb 13 2014, 05:22 PM
Post
#14
|
914 Guru Group: Members Posts: 5,205 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
I've only had it happen once in a couple of decades of driving. That was going through the Desert in 100+ degree temps up a long hill. I think it is more likely to be a mixture problem of some kind than vapor lock. --DD (IMG:style_emoticons/default/agree.gif) +1 Check the MPS on vaccum.....could be starting to break. If you think it might be vapor lock get a sealed fuel gauge at HF and mount it inline to be sure. Try to replicate the problem. My two cents. |
914_teener |
Feb 13 2014, 05:24 PM
Post
#15
|
914 Guru Group: Members Posts: 5,205 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
......ohhhh....and make sure your meat whistle is clean! (IMG:style_emoticons/default/av-943.gif)
|
KELTY360 |
Feb 13 2014, 06:18 PM
Post
#16
|
914 Neferati Group: Members Posts: 5,036 Joined: 31-December 05 From: Pt. Townsend, WA Member No.: 5,344 Region Association: Pacific Northwest |
|
MDG |
Feb 13 2014, 06:25 PM
Post
#17
|
Wolf in wolf's clothing. Group: Members Posts: 8,652 Joined: 3-February 09 From: Toronto Member No.: 10,018 Region Association: None |
There was this blond that married a truck driver ... On their wedding night, he demanded she get on her knees and blow the meat whistle .... When nothing came of it, he declared he must be vapor locked ... That's what it is like. (IMG:style_emoticons/default/av-943.gif) |
Kirmizi |
Feb 13 2014, 08:26 PM
Post
#18
|
Senior Member Group: Members Posts: 836 Joined: 12-February 06 From: Wyoming, US Member No.: 5,568 Region Association: None |
Jaime's possible vapor lock issue is something unique I think. He doesn't have heater valves on his heat exchangers, but they're hooked up to the fan shroud, so it hot air directly from the heat exhcuangers is being dumped directly onto the fuel pump.. Connect the rest of the ducting of the heating system to control the flow of hot air from the HEs. IIRC the Porsche suggested removing the caps from the passenger side heater valves in order to vent heated air away from the fuel pump. |
oldschool |
Feb 14 2014, 01:34 AM
Post
#19
|
Advanced Member Group: Members Posts: 3,362 Joined: 29-October 08 From: P-town Member No.: 9,705 Region Association: Southern California |
I'm going to put back the heater valves..that should do it. (IMG:style_emoticons/default/piratenanner.gif)
|
TheCabinetmaker |
Feb 14 2014, 06:44 AM
Post
#20
|
I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
The heater valve, when in the closed position, just dumps the hot air. It dumps directly on the pump which is only about 2 inches away. Leave the valve off and cap both tubes. My 73 used to have vapor lock anytime it got above 95. Moving pump to front trunk solved that problem forever.
|
Lo-Fi Version | Time is now: 10th June 2024 - 04:42 AM |
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 ... |