Question about ECU codes 83,84,85 and engine problems

[JerseyCruiser]

Today I had a CEL on for about 2 minutes and it reset did the same thing last week. Unfortunately found out that ECU had the 83,84,85 codes stored in it and its the POS 89661-60170 I do plan on replacing it with used unit. I'm just curious to know if others with this old ECU had any noticeable engine issues like high or low idle poor MPG or anything else. Will there be any warning of impending failure other than the codes or is it just going to crap out and die?

Thanks
George


PS If any one has an extra 89661-60221 I'll take it off your hands.
No longer looking for a 94 ECU, Beno hooked me up big time.

 

[cruiserdan]

I pulled mine after the ~6th time it triggered the codes. I do not know the long-term ramifications of leaving it in once it acts up. I can tell you that the intervals shortened from a few weeks apart to where it would trigger the codes as soon as it was powered-up.

 

[timbercruiser]

Mine has been on since April. still runs fine.

tick tick tick.......

 

[JerseyCruiser]

I pulled mine after the ~6th time it triggered the codes. I do not know the long-term ramifications of leaving it in once it acts up. I can tell you that the intervals shortened from a few weeks apart to where it would trigger the codes as soon as it was powered-up.

Dan,

Did you notice any difference in engine performance after changing the ECU? I was wondering if its ability at this point to effectively manage the engine has been compromised and has been prior to getting the codes.

 

[brian]

tagging along.

 

[cruiserdan]

Dan,

Did you notice any difference in engine performance after changing the ECU? I was wondering if its ability at this point to effectively manage the engine has been compromised and has been prior to getting the codes.

I do not remember much of a difference but I did not leave the ECU in after it started acting up. Logic dictates that the improved engine/transmiison interface would be a benefit but I can't quantify it.

 

[4dmalamute]

My cruiser has had the same codes for over two years......maybe even longer. I do have the new ECU though. The rig runs fine........well, besides it wont pass smog due to the check engine light and another huge issue that I am still waiting for parts from another cruiser member.

 

[brian]

so, dan, what's a the perferded ecm cost?
mine just through 83 and 85 agian.

 

[cruiserdan]

A lot actually. A new 89661-60221 lists for $1,663.31 and mudder cost is $1,247.48

Hardly seems enough, does it.

 

[brian]

so what kind of dog and pony show is it to swap them out?

 

[cruiserdan]

It takes ~10 minutes.

Disconnect the - battery terminal, remove the glove box and the computer is right there. Take out ~4 screws and unplug it. Transfer the brackets to the new one and reverse.

 

[landtank]

There is a 94 at the pick and pull here in town and I was going by anyway. If someone wants me to take a look and get a price let me know.

 

[brian]

There is a 94 at the pick and pull here in town and I was going by anyway. If someone wants me to take a look and get a price let me know.

i'm letting you know......please.

 

[ToothDr]

I just replaced my old ECU 89661-60170 in my 93 with the updated ECU from the late 93-94 model years. Like Dan said, easy install. Seems like the tranny shifts smoother and idle is much more consistant. It did take a number of starts and a day or two of driving for the new ECU to learn the idle settings. Nice thing is that the CEL is gone along with codes 83,84,95. I put a used ECU in mine.



Pete

 

[OGBeno]

A lot actually. A new 89661-60221 lists for $1,663.31 and mudder cost is $1,247.48

Hardly seems enough, does it.

He got one for waaaaaaaay cheaper than that!

 

[CameronM]

I'm struggling to get rid of my CEL. I'm pulling code 84 only. CEL is not on when I start the truck, but 30 seconds down the road it lights up.

My truck came with ECU 89661-60221. I didn't realize this at first, and bought a used ECU, 89661-60221. I've swapped back and forth and neither clears the codes

My truck shifts smoothly, but I replaced the shift solenoids, all 4 of them with Aisin parts, as I was changing transmission fluid anyway.

Any ideas on what else could be causing this CEL? The truck runs and drives great, only thing to note is there are no cats.