 ECU's, WQuestion |
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Thursday, 24 July 2025 |
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| 'Cause |
 May 11 2014, 01:31 PM
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#1
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..its all about toyz....  Group: Members Posts: 101 Joined: 10-January 07 From: Colorado Springs, CO Member No.: 7,446  |
Are the ECU's the same for a '74 and '75, are they interchangable?
Mine is a '74 2.0 but I also have a '75 ecu, are they the same? |
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| Mblizzard |
May 11 2014, 01:34 PM
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#2
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
See http://members.rennlist.com/pbanders/djetparts.htm and compare the numbers.
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| Cap'n Krusty |
May 11 2014, 02:11 PM
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#3
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
'75/'76 cars run quite a bit leaner. That may be an issue.
The Cap'n |
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| 'Cause |
May 11 2014, 08:01 PM
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#4
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..its all about toyz.... Group: Members Posts: 101 Joined: 10-January 07 From: Colorado Springs, CO Member No.: 7,446 |
Thanks...
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| ggress |
May 11 2014, 10:44 PM
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#5
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Newbie Group: Members Posts: 6 Joined: 11-May 14 From: Oregon Member No.: 17,334 Region Association: None |
I have a similar question on my '74 2.0.
The P/N on my ECU match those in the table from link. However, there is a three digit number (090) after the part number. Does anybody know what the 090 represents ?  |
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| zambezi |
May 11 2014, 10:59 PM
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#6
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Senior Member Group: Members Posts: 711 Joined: 14-April 08 From: Lafayette, LA Member No.: 8,920 Region Association: South East States |
Not to hijack this thread but have a question that might be relevant for others wondering about ECU issues. How can you determine what the ECU number is if there is no longer a sticker?
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| Bleyseng |
May 12 2014, 04:21 AM
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#7
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
QUOTE('Cause @ May 11 2014, 11:31 AM)  Are the ECU's the same for a '74 and '75, are they interchangable? Mine is a '74 2.0 but I also have a '75 ecu, are they the same? My testing of a 74 044 ECU and a 75 052 showed that the 052 ECU runs the AFR a half a point leaner, 13.7 to one vs the 052 14.2 to one. You can use the 052 but you should adjust the MPS to the correct 13.7 to 1 AFR. The 052 has the fuel shutoff when you are coasting til 1800 rpms so you do get better MPG. |
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