Heavy Isolated Misfire Under Load

[HighOctaneRacing]

I forgot I have an ICM I could sell you too lol. I gotta double check if the 97 year works for other years. What year is yours again?

 

[BillBoost37]

It's the same

 

[jimzssei]

I know I'm late to this party, and you guys don't know me at all, but I just experienced a "misfire under load/boost" on my 02 ssei. The control module and coils were good but...

The heat sinc/bracket was loose, causing the misfire. It never popped a cell. The misfire DEFINITELY hit hard, like a fuel cut, or shutting the key off/on quickly. Once I tightened the control mod bracket the problem was eliminated... Gone.

Just wanted to share!



Sent from Ohio

 

[16MustangVet]

iirc there should also be a ground wire that goes by the icm bracket too.

 

[BillBoost37]

All good suggestions.

 

[Jomamma]

I don't see a heat sink but the ICM is tight on the bracket. The ground wire is also hooked up.

 

[BillBoost37]

Is the icm 7mm retaining bolt snug? This is the bolt that holds the wiring connector to the ICM

 

[HighOctaneRacing]

I don't see a heat sink but the ICM is tight on the bracket. The ground wire is also hooked up.

Does the ground wire have a giod connection tho? I would sand it down a little just to be sure

Sent from my SCH-S720C using Tapatalk 2

 

[BillBoost37]

Ground can be left unhooked. Not telling you how I know.

 

[Jomamma]

Is the icm 7mm retaining bolt snug? This is the bolt that holds the wiring connector to the ICM

Yes the 6.5mm* bolt is snug

Ground can be left unhooked. Not telling you how I know.

Yeah I left it unhooked by accident after one of the 100 times I had to pull the valve cover. Didn't notice a difference

 

[BillBoost37]

It's a 7mm ... might wanna check that for rust..lol

 

[BrandonHall10]

Ground can be left unhooked. Not telling you how I know.

I JUST reconnected mine after doing the VC gaskets. Didn't notice any problems before. I figured it would be a good idea to reconnect it though. LOL!

 

[Jomamma]

I should've known better than to challenge your knowledge of various 3800 bolt sizes.

 

[BillBoost37]

LOL.. there's a few that will trip ya up.

Like alt/tensioner bracket bolt head sizes are different 97/98ish vs 00+

 

[Jomamma]

So who wants my money? Still in need of an ICM.

 

[HighOctaneRacing]

Do you want just the ICM? I's got one to sell but if, for whatever reason, you want the bracket and coils LMK. I'll give you a better deal then I posted

 

[Jomamma]

No bracket or coils needed. Just the ICM

 

[Jomamma]

All those aboard the ICM train may now get off.

Swapped it out same problem.

The injector o-ring is messed up on cyl 1 gonna replace that tomorrow.

 

[HighOctaneRacing]

That's a bummer man. have you swapped injectors to see if it's misfiring?

 

[Jomamma]

Yes I have.

My aero force isn't picking up the misfire now, or at least its not telling me which cylinder anymore.