 WTB: 1.8 L-Jet Brain |
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| Rob-O |
 Nov 21 2024, 04:08 PM
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#1
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Senior Member  Group: Members Posts: 1,256 Joined: 5-December 03 From: Mansfield, TX Member No.: 1,419 Region Association: Southwest Region 
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I’d really love for this to be a ‘Want To Borrow’ initially. But ‘Want To Buy’ is certainly okay by me.
My L-Jet is still ‘missing’ at certain times. I’ve checked and replaced tons of parts. I’ve narrowed the timing of the miss down. Starting up the car is fine and settles into a perfect idle. After about 10-15 minutes it develops a miss. Distributor is a 123. New coil, new temp sensor, checked and cleaned all grounds. No vacuum leaks that I’ve detected. AAR has been checked, TB was rebuilt, all FI wiring was checked for continuity before installing several years back. AFM was changed out to a known good unit (thanks @clayperrine ). I feel like I’ve checked everything except changing out the brain. And since the brain can’t be easily bench tested I thought I’d reach out here to see if someone had one laying around. |
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| JeffBowlsby |
Nov 21 2024, 05:13 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,740 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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| bdstone914 |
Nov 21 2024, 05:39 PM
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#3
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bdstone914 Group: Members Posts: 4,710 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(Rob-O @ Nov 21 2024, 04:08 PM)  I’d really love for this to be a ‘Want To Borrow’ initially. But ‘Want To Buy’ is certainly okay by me. My L-Jet is still ‘missing’ at certain times. I’ve checked and replaced tons of parts. I’ve narrowed the timing of the miss down. Starting up the car is fine and settles into a perfect idle. After about 10-15 minutes it develops a miss. Distributor is a 123. New coil, new temp sensor, checked and cleaned all grounds. No vacuum leaks that I’ve detected. AAR has been checked, TB was rebuilt, all FI wiring was checked for continuity before installing several years back. AFM was changed out to a known good unit (thanks @clayperrine ). I feel like I’ve checked everything except changing out the brain. And since the brain can’t be easily bench tested I thought I’d reach out here to see if someone had one laying around. @Rob-O I may have one. Is it for a 74 or 75? What is the part number on it? |
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| fiacra |
Nov 21 2024, 06:37 PM
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#4
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Person.Woman.Man.Camera.TV Group: Members Posts: 443 Joined: 1-March 19 From: East Bay Region - California Member No.: 22,920 Region Association: Northern California
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I have an ECU for a 1974 1.8 that I bought from Len Hoffman a while back. The backstory was that it had been taken out of a running car and sat on a shelf in dry storage for ~25 years. Not tested by Len or me, but if you want you can borrow it to run in your car. Just cost you postage both ways, and if it cures your problem I'll sell it to you for a more than reasonable price.
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| technicalninja |
Nov 21 2024, 06:50 PM
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#5
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Advanced Member Group: Members Posts: 2,006 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region
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I'm out of Granbury Texas and have two that you are welcome to borrow.
One is a recent Bosch "rebuilt" that I purchased off of another member that replaced everything with a stand-alone Megasquirt system. Everything was working fine 2 years back per the seller. I don't want to sell either but using them as a diagnostics check is fine with me. PM me if you'd like to come down south... |
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| ClayPerrine |
Nov 21 2024, 09:55 PM
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#6
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Life's been good to me so far..... Group: Admin Posts: 15,901 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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Rob,
I have a few laying around here. You may borrow one if you need to test yours. Also, did you check the wires on the dropping resistors? They break from vibration and may sometimes cause an intermittent miss. Clay |
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| Geezer914 |
Nov 22 2024, 05:33 AM
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#7
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Geezer914 Group: Members Posts: 1,767 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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What year 914? 74 1.8 is different than a 75-76 unit.
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| StarBear |
Nov 22 2024, 09:12 AM
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#8
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Advanced Member Group: Members Posts: 2,071 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States
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QUOTE(ClayPerrine @ Nov 21 2024, 10:55 PM) Rob, I have a few laying around here. You may borrow one if you need to test yours. Also, did you check the wires on the dropping resistors? They break from vibration and may sometimes cause an intermittent miss. Clay (IMG:style_emoticons/default/agree.gif) Didn’t know there are so many 1.8 ECUs out there. Yes, 74 and 75/76 are different. Curious as to how many 76 1.8Ls were produced. |
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| StarBear |
Nov 22 2024, 09:14 AM
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#9
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Advanced Member Group: Members Posts: 2,071 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States
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QUOTE(JeffBowlsby @ Nov 21 2024, 06:13 PM) @jeffbowlsby Can they do 1.8L ECUs? Very important and maybe the only ones if they can. |
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| JeffBowlsby |
Nov 22 2024, 09:34 AM
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#10
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914 Wiring Harnesses Group: Members Posts: 8,740 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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QUOTE(StarBear @ Nov 22 2024, 07:14 AM) QUOTE(JeffBowlsby @ Nov 21 2024, 06:13 PM) @jeffbowlsby Can they do 1.8L ECUs? Very important and maybe the only ones if they can. Contact them to verify. |
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| Rob-O |
Nov 23 2024, 04:24 PM
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#11
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Senior Member Group: Members Posts: 1,256 Joined: 5-December 03 From: Mansfield, TX Member No.: 1,419 Region Association: Southwest Region
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QUOTE(bdstone914 @ Nov 21 2024, 03:39 PM) QUOTE(Rob-O @ Nov 21 2024, 04:08 PM) I’d really love for this to be a ‘Want To Borrow’ initially. But ‘Want To Buy’ is certainly okay by me. My L-Jet is still ‘missing’ at certain times. I’ve checked and replaced tons of parts. I’ve narrowed the timing of the miss down. Starting up the car is fine and settles into a perfect idle. After about 10-15 minutes it develops a miss. Distributor is a 123. New coil, new temp sensor, checked and cleaned all grounds. No vacuum leaks that I’ve detected. AAR has been checked, TB was rebuilt, all FI wiring was checked for continuity before installing several years back. AFM was changed out to a known good unit (thanks @clayperrine ). I feel like I’ve checked everything except changing out the brain. And since the brain can’t be easily bench tested I thought I’d reach out here to see if someone had one laying around. @Rob-O I may have one. Is it for a 74 or 75? What is the part number on it? @clayperrine I’ll check the part number ASAP but I can tell you the AFM has six pins, So ‘74. |
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| Rob-O |
Nov 23 2024, 04:29 PM
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#12
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Senior Member Group: Members Posts: 1,256 Joined: 5-December 03 From: Mansfield, TX Member No.: 1,419 Region Association: Southwest Region
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@fiacra and @technicalninja . Thanks gentleman. I may take you up on your offers. Clay is local (well, closer than Granbury, TX at least). If he has one I’ll go that route. If not I’ll ping you fellas. Would be nice to eliminate or confirm this as the issue.
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