[RC426srt8]

Why is it so expensive and difficult to find and buy an ecm for my Jeep Srt8?

 

[White Elemant]

What do you consider expensive?

 

[RC426srt8]

What do you consider expensive?

$1200 for the 3rd time

 

[White Elemant]

That is a bit steep for sure, but third, what the hell is going on with your car?

 

[RC426srt8]

That is a bit steep for sure, but third, what the hell is going on with your car?

I have had it at 5 different shops including dealership and nobody can figure it out.

 

[White Elemant]

Do they get totally fried, or just start acting up?

Or is this just a single failed unit and you have three offers of 1200 to replace it?

 

[RC426srt8]

And 2 different tuners.

 

[RC426srt8]

And 2 different tuners.

The big issue is c121c. That’s the code they can’t figure out.

 

[RC426srt8]

The big issue is c121c. That’s the code they can’t figure out.

I’m going through all of the wires right now

 

[eskle]

I’m going through all of the wires right now

ABS module checked?


Sent from my iPhone using Tapatalk

 

[RC426srt8]

That is what I’m checking tomorrow .

 

[White Elemant]

While you're at it, yaw rate sensor might also be failing or become loose. Wheel speed sensors should throw their own codes, so they are unlikely but still possible point of failure...

As for the wiring harnesses, they are, as you prolly know by now a bitch to check. Especially if the problem is intermittent.

Check all the connector pins (especially on modules) with a magnifying thingy for signs of sparkin. IIRC older GC models had a habit of arcing in the connectors.

 

[RC426srt8]

While you're at it, yaw rate sensor might also be failing or become loose. Wheel speed sensors should throw their own codes, so they are unlikely but still possible point of failure...

As for the wiring harnesses, they are, as you prolly know by now a bitch to check. Especially if the problem is intermittent.

Check all the connector pins (especially on modules) with a magnifying thingy for signs of sparkin. IIRC older GC models had a habit of arcing in the connectors.

I will check all of that out. I really appreciate your help thank you hopefully I’ll find the gremlin.

 

[eskle]

I had a misaligned wheel speed sensor that totally screwed up my Jeep. It would start, go into D but as soon as about 5mph would go limp. Threw every code BUT a sensor code.


Sent from my iPhone using Tapatalk

 

[waumo]

Highly unlikely you have 3 failed ECMs. How was it determined they were failed?

 

[eskle]

Highly unlikely you have 3 failed ECMs. How was it determined they were failed?

I wasn’t going to go there but 100% agree.


Sent from my iPhone using Tapatalk

 

[RC426srt8]

The first two were sent off to a computer shop in Pennsylvania that said they were bad and not repairable, the third one going through the steps of diagnosing it says my ecm is bad. I’m in the process of going through all the wires and checking for continuity. I replaced the yaw rate sensor no change and I tested the wires from abs to yaw rate sensor continuity is good. The shops I’ve had it at supposedly did everything I’m going to.

 

[White Elemant]

If the ECMs were in fact all toast, there most likely is either a bad intermittent ground or a chafed wire pair in the loom that spikes voltage into wrong pin. Or, last guess, the TIPM is effed up and burns the ECM.

 

[RC426srt8]

If the ECMs were in fact all toast, there most likely is either a bad intermittent ground or a chafed wire pair in the loom that spikes voltage into wrong pin. Or, last guess, the TIPM is effed up and burns the ECM.

I agree I have to go through it with a fine tooth comb.

 

[White Elemant]

One possible way to go would be to buy a whole harness, preferrably used one, and swap it in. If that doesn't work, you are likely to get the money back by selling it.

TIPMs are expensive I think...