MotorCraft Plugs OK?

[JamesHecker]

I bought Denso Irridium plugs from Dennis with the Stage Two package about 5 years ago. Took it to the dealer for service, tires, and to diagnose a miss.

They said I just need two new plugs and coils. They don't have the Denso's and I don't have time to wait for them to be shipped.

Is it OK to put two new motorcraft plugs in with the old other 6 Denso's? The shop said I don't need to replace the others. Is there any reason I should go ahead and replace all of them at the same time? They have about 70,000 miles on them.

[DOOM]

I would replace all of them!

[RacerX]

^Ditto^ Keep them all the same. You can always get two Densos later for a full matched set. Then again, five years... any signs of brown or blow-by on the ceramic base? Two bad coils? Or are they saying more than two?

[babbage]

I would replace all of them!

Ditto. You can do it yourself. My FoMoCo dealer gets $84.00 an hour.

At that price you could get (8) Accel silver tip racing plugs.

[martyo]

What are the mods on the car?

[chader]

I would change them all. If two are shot i would think the others can't be far behind.

[musclemerc]

Motorcraft plugs are fine, Autolite is my choice.

[RoyLPita]

I've got a set of Densos that I am not using. Let me know.

[Rocknee]

Heard Autolite make Motorcraft plugs

[RR|Suki]

You can just get a full set of 8 standard (usually called copper) plugs that are the same temp as the Densos (one step colder? the number on the Denso plug will tell you that). It might cost you $20 and you'll be all set.

[martyo]

I have runs in the 9's on Motorcrafts.

Do you think the Densos will pick me up any?

[RR|Suki]

I have runs in the 9's on Motorcrafts.

Do you think the Densos will pick me up any?

you'd pick up at least 50rwhp ;)

[RF Overlord]

Heard Autolite make Motorcraft plugsYou heard right.

[fastblackmerc]

I have runs in the 9's on Motorcrafts.

Do you think the Densos will pick me up any?

Sure, they'll lighten your wallet.

Less weight = lower ET.

[JamesHecker]

Thanks guys. They put the two Motorcraft plugs in and replaced two coils. It does run better. No more miss.

I realized that it has been more than 5 years since I got these from Dennis. I got the plugs, the cooler thermostat, the torque converter, the matrix drive shaft, the 410 gears and a chip from him when I had about 12,000 miles on it, about 6 or more years ago I think.

The PCM has since been replaced and the chip does not work with the new one. So my shift points are off and the speedo runs about 10mph too much. It definatley is not as much fun w/o the chip, but I don't have an extra few hundred bucks to spend right now :-(

[lifespeed]

The PCM has since been replaced and the chip does not work with the new one. So my shift points are off and the speedo runs about 10mph too much. It definatley is not as much fun w/o the chip, but I don't have an extra few hundred bucks to spend right now :-(


sounds like a clever software protection scheme depriving you of your paid-for product. typical. :rolleyes:

[CRUZTAKER]

I have runs in the 9's on Motorcrafts.

Do you think the Densos will pick me up any?


I ran Motorcrafts all through my 13 second NA glory days.

The Iridiums made no difference with performance during our short hiatus.

[RacerX]

The PCM has since been replaced and the chip does not work with the new one. So my shift points are off and the speedo runs about 10mph too much. It definatley is not as much fun w/o the chip, but I don't have an extra few hundred bucks to spend right now :-(

What is the original PCM code? Should be on the driver door pillar when you open the door. You could sell that chip to someone that needs one and has that code.

[Blackened300a]

I ran Motorcrafts all through my 13 second NA glory days.

The Iridiums made no difference with performance during our short hiatus.

Did you go a step colder or kept them stock temp?

[martyo]

I ran Motorcrafts all through my 13 second NA glory days.

The Iridiums made no difference with performance during our short hiatus.

Ditto Barry!

Hey, why don't you and the family come to SSHS10? I would love for Jess to meet Val.

[CRUZTAKER]

Ditto Barry!

Hey, why don't you and the family come to SSHS10? I would love for Jess to meet Val.

Jessica is actually entertaining the idea!

[RF Overlord]

sounds like a clever software protection scheme depriving you of your paid-for product. typical. :rolleyes:It's nothing that sinister. The catch code on the new PCM is different than the original and the chip no longer matches. The chip's vendor can fix that with a re-burn.

[martyo]

Jessica is actually entertaining the idea!

Heck ya!!!

Val said she has no interest in going to the track event, but I am still trying to work her over!