Ljet experts., I figure I will start this thread now. |
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Ljet experts., I figure I will start this thread now. |
914itis |
Apr 18 2013, 08:08 PM
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#1
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
My brother in Georgia is slowly putting back together a 75 ljet that I gave him. He's doing everything with my help over the phone.
For some reason he refuses to post here. Today, we finally got the engine started. It starts for a couples seconds and dies. The air cleaner assembly is still out. I know with djet the car will idle without the air cleaner. Is it the same with ljet or should we start looking elsewhere? |
timothy_nd28 |
Apr 18 2013, 08:15 PM
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#2
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
Is the air flow meter still attached to the rubber boot?
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ConeDodger |
Apr 18 2013, 08:24 PM
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#3
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Apex killer! Group: Members Posts: 23,613 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
Battery fully charged I assume?
Fuel pressure? There must not be any vacuum leaks. Vacuum leaks confound the ECU. Most EFI problems are really not EFI problems... |
914itis |
Apr 18 2013, 08:34 PM
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#4
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
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914itis |
Apr 18 2013, 08:37 PM
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#5
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
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Chris H. |
Apr 18 2013, 08:39 PM
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#6
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Senior Member Group: Members Posts: 4,032 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest |
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914itis |
Apr 18 2013, 08:39 PM
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#7
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
I forgot to mention that if he cranks it again it starts right away, idles for about 5 -10 seconds
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Mark Henry |
Apr 18 2013, 08:43 PM
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#8
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Vacuum leaks, get new hoses, there's even a seal in the oil cap that must be perfect.
BTDT |
jim_hoyland |
Apr 18 2013, 08:50 PM
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#9
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Get that VIN ? Group: Members Posts: 9,319 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
One of the wires at the dual relay is not making good contact or the dual relay is shot. There is a test you can do to verify the dual relay is good. PM me your email and I'll send you a step by step copy
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messix |
Apr 18 2013, 09:14 PM
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#10
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AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
the crank case must be a sealed unit, ie the oil cap on and tight, all breathers connected to the airbox and intake.
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timothy_nd28 |
Apr 18 2013, 09:18 PM
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#11
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
I don't think the air flow meter is connected. You stated that the car runs at idle for a few moments before it stumbles and dies. Having the AFM's 6 pin or 7 pin connector not attached to the AFM can cause this. The fuel pump is activated thru the dual relay. The dual relay first receives voltage from the ignition switch at the "start" position. As soon as you let go of the key, and it springs back to the "on" position, you lose the voltage going to the dual relay. (A hand off occurs at this point) With the engine idling, the AFM supplies voltage to the dual relay. Having no AFM connected, the dual relay will never receives this voltage, thus the fuel pump stops and the engine dies. I'm pretty sure if you add a jumper from pin 88d on the dual relay to the positive battery post, the car will continue to idle indefinitely. However, with no AFM, if you blip the throttle the engine will die.
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skeates |
Apr 18 2013, 09:29 PM
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#12
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Member Group: Members Posts: 218 Joined: 28-February 05 From: Sacramento, ca Member No.: 3,684 Region Association: Northern California |
I don't think the air flow meter is connected. You stated that the car runs at idle for a few moments before it stumbles and dies. Having the AFM not installed, or the 7 pin connector not attached to the AFM can cause this. The fuel pump is activated thru the dual relay. The dual relay first receives voltage from the ignition switch at the "start" position. As soon as you let go of the key, and it springs back to the "on" position, you lose the voltage going to the dual relay. (A hand off occurs at this point) With the engine idling, the AFM supplies voltage to the dual relay. Having no AFM connected, the dual relay will never receives this voltage, thus the fuel pump stops and the engine dies. I'm pretty sure if you add a jumper from pin 88d on the dual relay to the positive battery post, the car will continue to idle indefinitely. However, with no AFM, if you blip the throttle the engine will die. (IMG:style_emoticons/default/agree.gif) sounds like the plug on afm isn't connectected. |
r_towle |
Apr 18 2013, 09:38 PM
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#13
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
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914itis |
Apr 18 2013, 09:43 PM
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#14
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
Thanks and I have a lot of information to start troubleshooting. Stay tune......
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computers4kids |
Apr 18 2013, 09:47 PM
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#15
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Love these little cars! Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None |
I don't think the air flow meter is connected. You stated that the car runs at idle for a few moments before it stumbles and dies. Having the AFM not installed, or the 7 pin connector not attached to the AFM can cause this. The fuel pump is activated thru the dual relay. The dual relay first receives voltage from the ignition switch at the "start" position. As soon as you let go of the key, and it springs back to the "on" position, you lose the voltage going to the dual relay. (A hand off occurs at this point) With the engine idling, the AFM supplies voltage to the dual relay. Having no AFM connected, the dual relay will never receives this voltage, thus the fuel pump stops and the engine dies. I'm pretty sure if you add a jumper from pin 88d on the dual relay to the positive battery post, the car will continue to idle indefinitely. However, with no AFM, if you blip the throttle the engine will die. (IMG:style_emoticons/default/agree.gif) sounds like the plug on afm isn't connectected. (IMG:style_emoticons/default/agree.gif) |
timothy_nd28 |
Apr 18 2013, 10:04 PM
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#16
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
Thanks and I have a lot of information to start troubleshooting. Stay tune...... That's good brotherly love, giving a 914 to your brother. (IMG:style_emoticons/default/aktion035.gif) |
914itis |
Apr 18 2013, 10:09 PM
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#17
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
Thanks and I have a lot of information to start troubleshooting. Stay tune...... That's good brotherly love, giving a 914 to your brother. (IMG:style_emoticons/default/aktion035.gif) Thanks, He would have done the same for me. He's always (IMG:style_emoticons/default/sheeplove.gif) his daily driver and his wife's. he claims that's because he is bored. Well well, he will be plenty busy with the 914 (IMG:style_emoticons/default/ar15.gif) |
tacm |
Apr 18 2013, 10:14 PM
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#18
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Newbie Group: Members Posts: 12 Joined: 3-April 13 From: Florida Member No.: 15,732 Region Association: None |
email me at smccutcheon@motioncnc.com and I will send the L-jetronic service manual. I do agree with above, Air flow meter, or vacuum leak
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JeffBowlsby |
Apr 18 2013, 10:15 PM
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#19
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914 Wiring Harnesses Group: Members Posts: 8,533 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
His name is not Harvey is it?
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timothy_nd28 |
Jan 1 2018, 07:11 PM
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#20
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
Did your brother ever get this figured out?
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