Trouble shooting injectors |
|
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. |
|
Trouble shooting injectors |
LanceW3544 |
Jul 29 2018, 02:38 PM
Post
#21
|
Newbie Group: Members Posts: 13 Joined: 25-July 18 From: Grand Rapids Mi Member No.: 22,337 Region Association: None |
First of all forgive my lack of knowledge. I am not new to cars but I am new to 914s. I recently purchased a 1970 914 1.7L. with D. Jet. The previous owner noted that it ran last year but was not able to get running this year. The car is far from perfect but I hope to be a solid start for a EJ20 swap in the next year or so. I would love to get the 1.7 fired up to start taking care of of other issues I am not currently aware of.
So let me start discribing what I am seeing Good Battery- Cranks over good and for a long time if needed Fuel Pump- working well but does not shut off after 1-2 seconds. New plugs New wires New cap and rotor I check the fuel rail and I know I have fuel to the injectors. I am able to fire the car up with starter fluid but ofcourse dies when it is burned off. I have had it runnig several times but is not consistant. I have check the grounds to the batter as well as the injector grounds. I don't know where to go next. Any advice would be appreciated. As you explain your suggestion please don't use abbrevations as I am not framilar with them all yet. Thanks -lance |
Chris914n6 |
Jul 31 2018, 03:42 PM
Post
#22
|
Jackstands are my life. Group: Members Posts: 3,341 Joined: 14-March 03 From: Las Vegas, NV Member No.: 431 Region Association: Southwest Region |
Next step is to trigger the injectors manually under pressure, jumper wires to the battery. I like to use gator clips on the injectors and tap, just tap, the battery post repeatedly.
A volt meter will pick up on the pulses from the ecu, but just barely as they don't react fast enough. A test light would work better, specially if it's LED. I'll need to read up on trigger testing, it's old tech in my world. Fresh gas is the best cleaner of old gas. They will clean themselves with use, but not like new clean like the ultrasonic cleaning does. Considering one of the members blew a hole in his piston on a freshly rebuilt motor from the injector spraying a stream instead of a mist, might be worth it to get them cleaned anyways. |
Lo-Fi Version | Time is now: 16th June 2024 - 01:17 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 ... |