Fox 91 mustang spring time woes

J

Jimmer009

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Apr 18, 2023

#1

• Apr 18, 2023

• #1

Hey all. So my 91 mustang speed master heads 190cc. X303 cam, megasquirt 2, msd6al. 42# injectors.

I have a misfire and a popping noise. The popping is intermittent. But the misfire is pretty consistent.

I replaced the plugs (they were black/soot covered) and cap and rotor. The wires are new last year as well as the coil and tfi module.

I have in wire test light. It shows good spark most of the time then it dies down and will then come back. As the motor has a hard time idling because of the xcam (low vacuum) I'm not a fan of it but will replace it when I get the budget to do it.

I have checked timing and I don't know where to from here?? Any help is appreciated.

 

nickyb

I gotta say i never painted my nuts, Never Ever

15 Year Member

Apr 3, 2009

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nevada

Apr 18, 2023

#2

• Apr 18, 2023

• #2

Probably your best to post in digital self tune forum, as that's likely your issue( the tune man)

 

J

Jimmer009

Member

Jan 4, 2022

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Apr 18, 2023

#3

• Apr 18, 2023

• #3

Thanks for the reply. I don't think it's much in the tune. I had the same tune in for awhile now. It even ran great last fall. I'm leaning more towards a hardware issue. I did post a log up on the megasquirt forum.

 

S

Shuttleman83

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Jun 30, 2019

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Apr 18, 2023

#4

• Apr 18, 2023

• #4

PIP? Injector O Rings?

 

J

Jimmer009

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Jan 4, 2022

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Apr 18, 2023

#5

• Apr 18, 2023

• #5

Im gonna look into the pip tonight. I don't see any fuel so I'm thinking it's not o rings. Any tips to checking the pip?? I'll Google it and go from there. I really don't want to tear my disturbor apart.

 

Potomus Pete

I'm still waiting for the fully nude shots

5 Year Member

Mar 7, 2019

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Apr 18, 2023

#6

• Apr 18, 2023

• #6

Get a Noid light at Harbor Freight and clip it on the injector wire/s. Its @ $10. If it flashes you are good

 

S

Shuttleman83

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Jun 30, 2019

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Apr 18, 2023

#7

• Apr 18, 2023

• #7

https://www.youtube.com/results?search_query=foxbody+pip+sensor

 

J

Jimmer009

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Jan 4, 2022

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Apr 18, 2023

#8

• Apr 18, 2023

• #8

So thanks for the help and suggestions. Shuttleman guess it. My buddy came over and we took his disturbor out put it in mine and all is good now. Granted I need a disturbor as I'm not gonna fix the old one. But thank you guys

 

Reactions: 90sickfox and General karthief

AeroCoupe

lube between the nut and the face. I know my lubes

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Apr 19, 2023

#9

• Apr 19, 2023

• #9

Why would you not fix the old one? Most if not all of the remans and "new" ones like the MSD's are junk. All you need is a Standard Ignition LX222 and watch a YouTube video on how to replace the stator / PIP / hall effect sensor.

 

S

Shuttleman83

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Apr 19, 2023

#10

• Apr 19, 2023

• #10

Glad you got it working

 

J

Jimmer009

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Jan 4, 2022

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Apr 19, 2023

#11

• Apr 19, 2023

• #11

Thanks. And I didn't give much thought to rebuilding it. I have a press. Granted it's a big 10 ton press. It will work. But a new remand one is cheap enough to just buy it. They come with a new tfi module and cap and rotor. I might just do that then have a spare.

 

AeroCoupe

lube between the nut and the face. I know my lubes

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#12

• Apr 19, 2023

• #12

I am telling you do a search on any Mustang site and the remans are just garbage. If you enjoy being stranded with a new distributor go for it or you can spend a little time and not have to worry about it.

 

Potomus Pete

I'm still waiting for the fully nude shots

5 Year Member

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#13

• Apr 19, 2023

• #13

He's right. Motorcraft is the only one you want

 

J

Jimmer009

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Apr 19, 2023

#14

• Apr 19, 2023

• #14

Ok I am in shock at how my car runs. It's faster than ever. It used to hesitate above 5000rpms. That's gone and it just goes. It's a stock disturbor my buddy let me use. So I'm thinking I'm gonna rebuild seeing especially if the other ones are junk.

 

Reactions: Potomus Pete, AeroCoupe, 90sickfox and 1 other person

J

Jimmer009

Member

Jan 4, 2022

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Apr 20, 2023

#15

• Apr 20, 2023

• #15

Any clue where to find a motor craft distributor?? I'm having a hard time finding them. I also see a rich porter one is also good??? Any thoughts or help where I can find either????

 

AeroCoupe

lube between the nut and the face. I know my lubes

Founding Member

Oct 28, 2001

5,835

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Apr 21, 2023

#16

• Apr 21, 2023

• #16

Get a used one and rebuild it.

www.car-part.com