Imrc zip tied but still breaking up?

Hey guys new to the forum I successfully zip tied my imrc open but I’m still having a problem where it’s breaking up in mid range till about 5200 rpm then kinda opens up a lil bit I was thinking maybe new plugs? Or some wires but they look really new considering just bought the car a couple days ago and have receipt saying they were done in 2017 about 20k miles ago but who knows just wondering if anyone else has this problem or is this normal


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I say change the plugs, change the fuel filter too.

me32 said:

I say change the plugs, change the fuel filter too.

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Ya was thinking the same my self just wasn’t sure


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OEM coilpacks? Or are they aftermarket?

98 svt said:

OEM coilpacks? Or are they aftermarket?

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Car has msd wires and coil packs which look pretty good still


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Report back after you replace the plugs (check the before and after gap) and fuel filter.

Redeye797 said:

Car has msd wires and coil packs which look pretty good still


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90% chance it is those coil packs. These cars like OEM coil packs and copper Autolite 764 plugs.
Nothing fancy. They don't like it.
Those MSD wires don't have a good reputation either.

98 svt said:

90% chance it is those coil packs. These cars like OEM coil packs and copper Autolite 764 plugs.
Nothing fancy. They don't like it.
Those MSD wires don't have a good reputation either.

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Go with OEM wires too.

Thanks for the replies guys really appreciate it will try everything you guys said next weekend and come back with a reply thank you


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Redeye797 said:

Thanks for the replies guys really appreciate it will try everything you guys said next weekend and come back with a reply thank you


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Gap those Copper Autolite 764s to .054
Replace Coil packs with OEM
Replace wire to OEM

You should be good to go next weekend.

Zip tieing the IMRCs open will often trip the CEL also.

98 svt said:

Gap those Copper Autolite 764s to .054
Replace Coil packs with OEM
Replace wire to OEM

You should be good to go next weekend.

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I think I will get my plugs done tomorrow along with fuel filter. Not to steal OPs thread, I've heard the MSD stuff isn't great on our cars. I have a set of ford racing wires to put on as well. Are those supposed to be decent?

mnewxcv said:

I think I will get my plugs done tomorrow along with fuel filter. Not to steal OPs thread, I've heard the MSD stuff isn't great on our cars. I have a set of ford racing wires to put on as well. Are those supposed to be decent?

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The older sets were great, lately people have been saying the quality went down hill with the Ford Racing wires. I honestly can't say either way as I haven't tried a new set.
I know my original set of FR wires is about 15 years old and still works great.

98 svt said:

The older sets were great, lately people have been saying the quality went down hill with the Ford Racing wires. I honestly can't say either way as I haven't tried a new set.
I know my original set of FR wires is about 15 years old and still works great.

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I will throw them on and see how it goes. btw, I finally put that side exhaust I got a year ago on my car.

mnewxcv said:

I will throw them on and see how it goes. btw, I finally put that side exhaust I got a year ago on my car.

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I'd like to see a pic or 2. You can PM them if you want.

mnewxcv said:

I will throw them on and see how it goes. btw, I finally put that side exhaust I got a year ago on my car.

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+1 side exhaust for the new edge is cheesey (minus the R). On a SN95 its tits, in for pics!

98 svt said:

I'd like to see a pic or 2. You can PM them if you want.

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Black02GT said:

+1 side exhaust for the new edge is cheesey (minus the R). On a SN95 its tits, in for pics!

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I will post some pics today in my original thread so not to threadjack any more:

https://www.svtperformance.com/threads/calling-svo-side-exhaust-owners.1159704/

Yep, definitely ignition related. When my OE plug wires finally started giving up the ghost, it had the exact same symptoms. Also, going up a steep hill at mid-low throttle it would miss like crazy. I replaced my wires with a set of FRPP wires, and it's been solid ever since. That was a couple of years ago though, I've heard some people say their quality isn't what it once was.

Any update with this?

Update: so ups somehow lost my wires but I put some auto lite copper plugs and the car seems to be about 80% better so went ahaead and cleaned the air filter and also cleaned the maf sensor and the car is definitely much happier pulls stronger through out the whole power band and doesn’t Misfire or struggle up top or down low car is also running smoother and quieter at idle


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