Missing and backfiring Pi swapped 97gt

forum155pl · Dec 5, 2006

i know ive been posting alot of threads, sorry guys this is just killin me..

I replaced the heater core about a month ago, and right after that my car started acting like a total pile of shyte. it felt like a bad miss so i replaced my plugs and wires , 6 of my plugs were tottaly black. then today i went and got a new MAF housing and a new sensor from ford thinking that i must of screwed it up when i ported it... still nothing, it actually made it worse, it backfires now...

I have the Xcal2 so i flashed it back to stock tune and it comes up with a p1000 code which means that the computer needs to calibrate all the sensors, but i wont want to drive the car like this because it dies randomly...

any help would be awesome guys, my brain is fried

Fuel pressure is at 32psi at idle
brand new ford motorcraft wires and plugs.......

the98stang · Dec 5, 2006

forum155pl said:
i know ive been posting alot of threads, sorry guys this is just killin me..

I replaced the heater core about a month ago, and right after that my car started acting like a total pile of shyte. it felt like a bad miss so i replaced my plugs and wires , 6 of my plugs were tottaly black. then today i went and got a new MAF housing and a new sensor from ford thinking that i must of screwed it up when i ported it... still nothing, it actually made it worse, it backfires now...

I have the Xcal2 so i flashed it back to stock tune and it comes up with a p1000 code which means that the computer needs to calibrate all the sensors, but i wont want to drive the car like this because it dies randomly...

any help would be awesome guys, my brain is fried

Fuel pressure is at 32psi at idle
brand new ford motorcraft wires and plugs.......

Are the cop boots nice and clean? no cracks?

Did you fix the problem that was causing the plugs to become black? Maybe the plugs are just really dirty and it's missing. What plugs are you using, and what are they gapped at?

Also check the fuel filter.

forum155pl · Dec 5, 2006

I dont have COPS, i have 2 coil packs, and i changed them with 2 extra packs that i had laying around that worked when i took em off...

plugs are AWSF-32P motorcraft gapped at .055

Fuel filter is 2 months old

i dont know what is caused the plugs to become so black, i took a plug out 2 months ago when i did my filter and it looked good... i had bosch platnums

after i changed the plugs last night it still does the miss...

COramprat · Dec 5, 2006

Try disconnecting the battery and see if it will relearn it's settings.

TYSAYStang · Dec 5, 2006

I had the same problem with super bad misfiring and sometimes losing power while driving down the road, and at times not being able to start the car for extended periods of time.

Ford sloshed radiator coolent around my engine and it got in the spark plug cavities...That's what caused the misfiring.

Recently had some more misfiring...I saw radiator coolant sitting on top of my engine...the intake gasket had sprung a leak.

Is it possible you got some moisture around your plugs while changing out your heater core?

For my power issue I had the battery cable replaced...but I still don't trust it (and was six years ago).

Dusstbuster · Dec 5, 2006

Could be messed up plug wires if you did something with them recently...I had similar problems as this when I did my manifold swap, I exhausted everything I could possibly think of, and it ended up being #7 and #8 plug wires mixed up..took about 5 days to figure this stupid little mishap out.

tomustang · Dec 5, 2006

grease all the connections and put the wires in order

forum155pl · Dec 5, 2006

right now i'm gapping my plugs to .045 to see if that will help because i have high compression...

tysaystang- actually i did have some water in the plug holes, this is what ifirst thought the misfire was, but when i changed my plugs and wires last ngiht i dried everything out really good..

dusstbuster- i did the same exact thing when i first did my PI swap, all the wires are in the right spots now...

Tommustang- if the smaller plug gap doesnt fix it i'm going to do that tomorrow after work..

forum155pl · Dec 6, 2006

Alright i gapped it at .045 , greased my wiring harness connections.... VROOM VROOM!!!!!.. runs great now!

oh yeah and plugged in the #8 plug wire

Stang|ess · Dec 6, 2006

forum155pl said:
oh yeah and plugged in the #8 plug wire

ahahahha. you mean you don't enjoy sounding like a WRX?

glad you found the problem.

forum155pl · Dec 6, 2006

thanks guys, :SNSign: rules

someone actually asked me if my car had a turbo on it when it was missing really bad...

Dusstbuster · Dec 6, 2006

I had a feeling it had something to do with the wires

four six · Dec 6, 2006

the 7 cylnder shake. Had the same problem

COramprat · Dec 6, 2006

forum155pl said:
oh yeah and plugged in the #8 plug wire

Don't fell bad man...everyone has had something similar happen before.

forum155pl · Dec 7, 2006

COramprat said:
Don't fell bad man...everyone has had something similar happen before.

ah i'm not worried about it, I'm the king of distruction, most all the problems i run into on my car are self inflicted... i break lots and lots of **** lol

Mike97gt · Dec 7, 2006

forum155pl said:
ah i'm not worried about it, I'm the king of distruction, most all the problems i run into on my car are self inflicted... i break lots and lots of **** lol

Sometimes thats the best way to learn..

tomustang · Dec 7, 2006

COramprat said:
Don't fell bad man...everyone has had something similar happen before.

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Missing and backfiring Pi swapped 97gt

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