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Ef xr8 running issues after mods 

 

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 Post subject: Ef xr8 running issues after mods
Posted: Sat Feb 01, 2014 1:41 pm 
Stock as a Rock
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Age: 28

Posts: 107

Joined: 24th Jul 2008

Gallery: 5 images

Ride: 92 EB- 2001 AU

Location: newcastle
NSW, Australia

Hey guys i have a ef xr8

Its auto
I installed gt40p heads and explorer manifolds and now it wont run very well.

I also have extractors and exhaust.

Never took the dizzy out so timing hasnt changed

I tried AU injectors it ran worse so i put EF ones back in

I do have a J3 chip but it has not been tuned

Any help appreciated

 

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 Post subject: Re: Ef xr8 running issues after mods
Posted: Sat Feb 01, 2014 4:34 pm 
Technical Contributor
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Joined: 22nd Jun 2005

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Ride: EF Fairmont

Location: Campbelltown
NSW, Australia

When you say "won't run very well", what do you mean?

More information/description of the fault will get you more accurate information in return.
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 Post subject: Re: Ef xr8 running issues after mods
Posted: Sun Feb 02, 2014 11:47 am 
Stock as a Rock
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Age: 28

Posts: 107

Joined: 24th Jul 2008

Gallery: 5 images

Ride: 92 EB- 2001 AU

Location: newcastle
NSW, Australia

Wont rev freely backfires lacks power under acceleration

Although it will idle perfectly and rev freely without load

 

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 Post subject: Re: Ef xr8 running issues after mods
Posted: Mon Feb 03, 2014 12:12 pm 
EFI Guru
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do a self test and give us a lot more info. Stock harness? sensors? sensor positions? MAF?
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