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Finally fixed my 2500rpm flatspot. 

 

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 Post subject: Finally fixed my 2500rpm flatspot.
Posted: Fri Feb 11, 2011 6:39 pm 
Getting Side Ways
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Age: 26

Posts: 1109

Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

So I've had a flat spot from around 2200 rpm to 3000rpm for quite a while, so today, after having my car on the gas bench and getting a efficancy % of 86% I decided its time for some maintenance.
So, new plugs, leads and o2 sensor straight up.
My old o2 sensor was RS, my plugs were the wrong ones! (From a eb series2) only differance is the electrode is about 3mm longer and they are a different heat rating.
The plug holes were so full of sand on cyl 3,4&5 that the plugs couldn't even go all the way in, no idea how I missed that when I put them in.
My old leads were topgun. So they were s**t anyway.
And now she starts like a champ, has a lot larger power band, no flat spot!! And even sounds slightly...throaty-er.
Not a bad out come for half a hours work and near $100.
6xplugs-$20.46
NTK o2 sensor-$55
NGK leads - $38.50
And of course some chemtech CT18 car wash for $8. So she can be shiney tomorro.

Sweet!
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Sat Feb 12, 2011 5:15 pm 
Oompa Loompa
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Age: 29

Posts: 30

Joined: 24th Mar 2010

Ride: EF fairmont ghia

Location: gold coast
QLD, Australia

how u check if ur o2 sensor has gone. check continunity/ohms, see if its open circuit or not?

cheers

josh
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Sat Feb 12, 2011 6:48 pm 
Fordmods Junkie
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Posts: 11738

Joined: 17th May 2005

Gallery: 11 images

Ride: EL Fairmont, VFR400 racer

Power: 144 rwkw

Location: Melbourne
VIC, Australia

What's wrong with TopGuns? I haven't had any issues with them ever since I bought them...

Good to see you fixed your problem though. I'm pretty curious as to how you got sand in your plug holes in the first place :S

 

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phongus = Post whore 2006
EL XR6 motor, EL ECU + J3 chip, WADE 1673 Camshaft, 3" S/S intake, Pacy 4480, 2.5" Hi flow cat, 2.5" Lukey exhaust.
Max Power = 144.6 rwkw (03/05/2008)

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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Sat Feb 12, 2011 8:25 pm 
Getting Side Ways
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Age: 26

Posts: 1109

Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

I put my car on the gas bench at work and it was rich on idle, rich on cruise and lean on WOT so I just figured itd be that, the o2 sensor was already in the extractors when I bought them 2nd hand too...

The sand was cought in the recess into to the head, on the lip, so I got small amounts of rag, rolled them up, put them in the holes, loosened up the sand with a small screwdriver, put my face down near it, closed my eyes and blew.
I have no idea how the sand got there, but I never noticed it there before.

as for topgun leads, they are crapola.
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Sat Feb 12, 2011 8:27 pm 
Getting Side Ways
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Age: 26

Posts: 1109

Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

Actually when I first got the car I did some circles in a paddoc that was nearish to the beach. Probably from that.
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Sun Feb 13, 2011 2:57 am 
Tyre Shredder
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Posts: 326

Joined: 12th Jun 2010

Ride: EL Fairmont

Location: Central Highlands
QLD, Australia

phongus wrote:
What's wrong with TopGuns? I haven't had any issues with them ever since I bought them...

Good to see you fixed your problem though. I'm pretty curious as to how you got sand in your plug holes in the first place :S


I had Top Gun leads they died after about 50000km. Started to crossfire between leads etc.. Their resistance is very bad too compared with Champion Steel leads (Jim Mock uses) which are $25 cheaper.

The longest Top Gun lead when new measured 15Kohms and the same Champion STEEL lead I re-installed was 8.5Kohms. Every lead after that was a huge improvement over the top gun leads, car started better, went better at full gas( no hickups etc) can't go wrong...

 

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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Sun Feb 13, 2011 6:25 am 
Fordmods Junkie
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Joined: 17th May 2005

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Ride: EL Fairmont, VFR400 racer

Power: 144 rwkw

Location: Melbourne
VIC, Australia

EL___Fairmont wrote:
phongus wrote:
What's wrong with TopGuns? I haven't had any issues with them ever since I bought them...

Good to see you fixed your problem though. I'm pretty curious as to how you got sand in your plug holes in the first place :S


I had Top Gun leads they died after about 50000km. Started to crossfire between leads etc.. Their resistance is very bad too compared with Champion Steel leads (Jim Mock uses) which are $25 cheaper.

The longest Top Gun lead when new measured 15Kohms and the same Champion STEEL lead I re-installed was 8.5Kohms. Every lead after that was a huge improvement over the top gun leads, car started better, went better at full gas( no hickups etc) can't go wrong...


Never really measured the leads. I guess if they ain't broke, don't fix it. Once mine die I'll try another :).

 

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phongus = Post whore 2006
EL XR6 motor, EL ECU + J3 chip, WADE 1673 Camshaft, 3" S/S intake, Pacy 4480, 2.5" Hi flow cat, 2.5" Lukey exhaust.
Max Power = 144.6 rwkw (03/05/2008)

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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Mon Feb 14, 2011 2:06 pm 
Getting Side Ways
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Age: 29

Posts: 2563

Joined: 19th Feb 2007

Gallery: 21 images

Ride: 98 EL Futura

Power: 199 rwkw

Location: Lilydale
VIC, Australia

never had problems with topgun leads either..

 

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EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come

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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Mon Feb 14, 2011 6:43 pm 
Getting Side Ways
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Age: 26

Posts: 1109

Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

I was talking with the floorsupervisor/ main mechanic at work and he was telling me how he has seen many issues with topguns, crossfiring, plug contacts comming out, insulation braking down prematuraly.
He said he'd rather use the bulk pack leads we get that have no brand name.
But I guess they can't be s**t in every application otherwise they'd be out of business.

After the new leads,plugs and o2 my fuel efficancy at cruise has gone from 86% to 95% but at idle is still low. ~70%, "apparently" that's about the best youd be expecting from a 90s era straight 6. New tps may give me a few % increase but its about the norm.
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Mon Feb 14, 2011 6:50 pm 
Getting Side Ways
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Age: 25

Posts: 510

Joined: 8th Aug 2010

Gallery: 9 images

Ride: NF Fairlane Ghia

I use topguns alot or eagle ignition leads as so has dad for his whole life we never use anything but and never had any of the problems described u sure he isnt just a knob ? or just after better profit margins ?

 

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NF Fairlane Ghia, Brand New Leather Interior, Wallnut All Through, 800W RMS JL Audio Sound System, Lowered King Springs And Monroe GT Shocks, Custom BA/GT Air Intake, Holley Highflow, Simmons B45's, Going To Be Supercharged At 9-12psi With Stage 4 Head And Cam With Pacemakers And 3" Exhaust

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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Tue Feb 15, 2011 4:52 pm 
Getting Side Ways
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Age: 26

Posts: 1109

Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

Well I had 2 of the problems with 1 set and id believe anything he says. He is certainly not a knob. Probably knows more about cars then anyone on this site.
So yea. Im sure he's not being a knob.
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Tue Feb 15, 2011 4:56 pm 
Getting Side Ways
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Posts: 595

Joined: 2nd Oct 2007

Power: 327 rwkw

Location: Perth
WA, Australia

87SIlude wrote:
And of course some chemtech CT18 car wash for $8. So she can be shiney tomorro.

Sweet!


would not use CT18 to save my life, s**t is straight up acid. May as well pour molten lava over it and be done.
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Tue Feb 15, 2011 6:38 pm 
Getting Side Ways
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Age: 26

Posts: 1109

Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

Yea? I love the sheet. Only thing that takes the tar off without having a bug and tar remover.
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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Tue Feb 15, 2011 7:16 pm 
Getting Side Ways
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Age: 29

Posts: 2563

Joined: 19th Feb 2007

Gallery: 21 images

Ride: 98 EL Futura

Power: 199 rwkw

Location: Lilydale
VIC, Australia

It also usually takes off any wax that is on your car so the paint isn't protected and will weather fairly quickly

 

_________________

EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come

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 Post subject: Re: Finally fixed my 2500rpm flatspot.
Posted: Tue Feb 15, 2011 7:24 pm 
Getting Side Ways
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Age: 26

Posts: 1109

Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

Actually. Would explain why my shine lastes only a couple washes.
Well ill use up this bottle. Wax again then use something softer.
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