Replaced ECU twice and now it does not start
#1
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Hello, I’d be super thankful if anyone could help me figure out this problem that I’ve been working on…. The car is a 1984 244 four-cylinder
I bought a Volvo a while ago, and I had some big issues with idling sounded like it was misfiring, and would occasionally stall out.
I replaced the ECU with one I found out the junkyard it was a few years older, but I put the ECU in and it started fine and was idling smooth for the first time since I bought it. However, whenever I tryed to drive forward, it would lose our power install out.
I then bought an ECU from the same exact year with all the same numbers on it. I think the numbers at the end are 510. I put this new ECU in and now it will not start with either of the old ECUs either.
I bought a Volvo a while ago, and I had some big issues with idling sounded like it was misfiring, and would occasionally stall out.
I replaced the ECU with one I found out the junkyard it was a few years older, but I put the ECU in and it started fine and was idling smooth for the first time since I bought it. However, whenever I tryed to drive forward, it would lose our power install out.
I then bought an ECU from the same exact year with all the same numbers on it. I think the numbers at the end are 510. I put this new ECU in and now it will not start with either of the old ECUs either.
#2
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1984 244 four-cylinder
I replaced the ECU with one I found out the junkyard
I then bought an ECU from the same exact year with all the same numbers on it.
I think the numbers at the end are 510.
I put this new ECU in and now it will not start with either of the old ECUs either.
I replaced the ECU with one I found out the junkyard
I then bought an ECU from the same exact year with all the same numbers on it.
I think the numbers at the end are 510.
I put this new ECU in and now it will not start with either of the old ECUs either.
Can't answer your question exactly - but I remember back in those days when one of my techs would mistakenly try a 1985 Air mass meter on a 1984 car (trying to diagnose by swapping parts
![Frown](https://volvoforums.com/forum/images/smilies/frown.gif)
#3
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What years did these ECUs come from? (I trust you are talking about your fuel system computer mounted next to the passengers right foot)
Can't answer your question exactly - but I remember back in those days when one of my techs would mistakenly try a 1985 Air mass meter on a 1984 car (trying to diagnose by swapping parts
) - Something bad would get fried, it was either the ECU or the air mass meter - So if you tried an incompatible ECU you may have fried it or your air mass meter.
Can't answer your question exactly - but I remember back in those days when one of my techs would mistakenly try a 1985 Air mass meter on a 1984 car (trying to diagnose by swapping parts
![Frown](https://volvoforums.com/forum/images/smilies/frown.gif)
either way, thank you and I will try to test the air mass meter or see if I can get a replacement (I’ll make sure it’s the same year this time)
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Last edited by alicethe2441984; 01-12-2024 at 03:34 PM.
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tongyudianqi
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12-23-2013 12:53 AM