Does fuel pump (injection) cut off if clogged?, YES i searched and read all 20 pages |
|
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. |
|
Does fuel pump (injection) cut off if clogged?, YES i searched and read all 20 pages |
jsayre914 |
Nov 15 2009, 11:56 AM
Post
#1
|
Speed Up !!! Group: Members Posts: 3,199 Joined: 10-February 08 From: Timonium MD 21093 Member No.: 8,696 Region Association: MidAtlantic Region |
On a bosh fuel pump (3 tit) does it cut out if it cannot get fuel?? I realize if it is intermittant it is probably a loose connection, loose or bad relay, loose pin on board, or dirty fuse on board, etc.
i am at work, and i am not so sure i will make it home tonight, i have a few tools, but no electrical stuff with me. i was wondering .... what would the pump do with good power and a clogged line?? i made it half way to work and the pump cut out 3 times within 1 min, then dead. i pulled over checked the pump and all connections tight. i tried to start it 4-5 times, heard the pump run for 1 sec then dead. crawled under and shook the filtre and banged on the pump. it started but would not idle. i then loosend the clamp holding the pump and turned it upside down. car started and kept strong at high idle but started to choke below 3500 rpm. I risked the drive into work, and made it idling between 3500 and 4500, it would start to cut out and i would downshift jump the rpm and it was ok again. welcome to my life |
Cap'n Krusty |
Nov 15 2009, 04:24 PM
Post
#2
|
Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Clogged filters are rare on our cars. They will NOT cause the pump to stop. It'll keep running until it burns itself up. If this is your L-jet car, check the inlet air boot and any other possible air leaks. The boot is NLA, and has been for years. The airbox will shut off the pump if there's not enough air flow going past the vane. Look at the TWO oil cap gaskets. They should both be intact and functional.
Report back. The Cap'n |
jsayre914 |
Nov 15 2009, 05:14 PM
Post
#3
|
Speed Up !!! Group: Members Posts: 3,199 Joined: 10-February 08 From: Timonium MD 21093 Member No.: 8,696 Region Association: MidAtlantic Region |
Clogged filters are rare on our cars. They will NOT cause the pump to stop. It'll keep running until it burns itself up. If this is your L-jet car, check the inlet air boot and any other possible air leaks. The boot is NLA, and has been for years. The airbox will shut off the pump if there's not enough air flow going past the vane. Look at the TWO oil cap gaskets. They should both be intact and functional. Report back. The Cap'n if the clog will not cause the pump to stop, then i have an electrical problem, or a flapper problem as you said. both oil cap gaskets are brand new, and all vacume lines are brand new. i inspected that huge rubber pipe and washed it good befor putting it back on few weeks ago. Everything is super tight. i have the idle screw all the way in and i can idle just under 1000 smoothly. yesterday. today is a different story. i did a different search and found more possibilities. cht wire broken, grounds under plenum came loose, coil has turned around and grounded a wire? i will check these also, before jumping in for my 65mile ride home tonight. (IMG:style_emoticons/default/idea.gif) |
underthetire |
Nov 15 2009, 05:54 PM
Post
#4
|
914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
i have the idle screw all the way in and i can idle just under 1000 smoothly. yesterday.
Sounds like a vacuum leak to me. I don't know of any that would have the idle screw all the way in and idle at 1K. |
jsayre914 |
Nov 15 2009, 05:58 PM
Post
#5
|
Speed Up !!! Group: Members Posts: 3,199 Joined: 10-February 08 From: Timonium MD 21093 Member No.: 8,696 Region Association: MidAtlantic Region |
i have the idle screw all the way in and i can idle just under 1000 smoothly. yesterday. Sounds like a vacuum leak to me. I don't know of any that would have the idle screw all the way in and idle at 1K. please explain... i thought this was the norm. if i back the screw one full turn the idle goes up about 500rpm and again if i turn 500 rpm etc. is that not normal?? |
Lo-Fi Version | Time is now: 27th September 2024 - 06:00 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 ... |