Hey,

So far I have a straight through muffler, K&N pod, and CAI. But I now have a hole in power below 3000rpm since the pod has been in. I'm assuming this is a lean out problem. Next on my list was extractors but I really need to get this sorted out before I do anything else.

What can be done to fix this? Has any body played with their air-fuel ratios? I have read the sticky thread about the injector rings and its supposed fix of the lean out problem, but the 1st thought that comes to mind is 'dodgey'....thoughts 2 to 97 also contain the words 'dodgey'.

I'm thinking of either an interceptor or making my own air fuel adjuster. But can an interceptor be used on a 4-speed auto (3.5L KH)?

Give me your suggestions please!

Interceptors can definately be used on your car. You probably won't have much luck developing your own fuel mixture adjustment because the Magna uses a frequency based airflow sensor rather than a simple voltage based sensor, making adjusting the signal a whole lot more tricky.

If you're handy electronically, buy one of JayCar's AFR monitoring kits and wire it up to your o2 sensor. They're not hugely accurate because the o2 sensor in your car is only accurate over a very narrow band, but it will give you a good indication as to whether you really are leaning out or not. And the best thing is it'll cost you about $30.

trust me...... a piggyback ecu is a very expensive way to fix the dreaded "K&N filter flat spot". I wouldn't recommend one unless more serious mods are planned in the future.

Off the top of my head - I would have to say there are about 3 other options which come to mind which have been recommended to fix the flat spot issue:

1. Ditch the K&N filter and go back to stock paper panel - by all accounts it fixes the flat spot, but you can kiss your nice top end revvyness goodbye

2. The "Barry" kit - I can understand your sceptisism....... but even as someone who is very doubtful of his claims myself - for the price of the kit, and the ease of fitting..... you really can't go wrong

3. Rising Rate fuel pressure regulator - this is recommended by RPW to 'improve throttle response'. The most expensive of the options listed here - but a hell of alot cheaper than a piggyback ecu. Personally I think it improved the low down throttle response on my car a great deal - but these things really are almost impossible to measure.

trust me...... a piggyback ecu is a very expensive way to fix the dreaded "K&N filter flat spot". I wouldn't recommend one unless more serious mods are planned in the future.

Off the top of my head - I would have to say there are about 3 other options which come to mind which have been recommended to fix the flat spot issue:

1. Ditch the K&N filter and go back to stock paper panel - by all accounts it fixes the flat spot, but you can kiss your nice top end revvyness goodbye

2. The "Barry" kit - I can understand your sceptisism....... but even as someone who is very doubtful of his claims myself - for the price of the kit, and the ease of fitting..... you really can't go wrong

3. Rising Rate fuel pressure regulator - this is recommended by RPW to 'improve throttle response'. The most expensive of the options listed here - but a hell of alot cheaper than a piggyback ecu. Personally I think it improved the low down throttle response on my car a great deal - but these things really are almost impossible to measure.

Hmmmm $5 worth of alloy spacers... oh look what i found in my scrap metal bin in my shed that can be machined up to fit. :D Might make my own up for a try.

Hmmmm $5 worth of alloy spacers... oh look what i found in my scrap metal bin in my shed that can be machined up to fit. :D Might make my own up for a try.

Can I pay you $250 for them? ;)

Your a bit of a guru Jason, how do I fix my flat spot???

As for my own fuel adjuster, yeah I neglected the fact that it's not a voltage output. I was going to build the silicon chip Digital Fuel Adjuster plus handset, so at least that idea can be put to rest....damn it, that would've kept me occupied over the xmas shutdown.

Can I pay you $250 for them? ;)

Your a bit of a guru Jason, how do I fix my flat spot???

As for my own fuel adjuster, yeah I neglected the fact that it's not a voltage output. I was going to build the silicon chip Digital Fuel Adjuster plus handset, so at least that idea can be put to rest....damn it, that would've kept me occupied over the xmas shutdown.


Mate, $200 and there yours..... :bowrofl:

As for the so called deadspot, my car mustve been a lucky one as i have never suffered any deadspot (other than hitting the rev limiter). A K&N panel filter was one of my first mods back in 1999 and i never noticed any dead spot BUT then again i didnt notice any improvement from fitting the K&N, other than never having to buy another air filter.

I'll should catch up with ya sumtime soon while i have a stock TJ1 motor in my car and i can show u that there is no dead spot. Only mods this engine has is my pacemaker headers, exhaust and my K&N panel filter.

Can I pay you $250 for them? ;)

Well you paid in excess of 150 for a 20 dollar filter element
lol
you might as well overpay for them too

Well you paid in excess of 150 for a 20 dollar filter element
lol
you might as well overpay for them too

At least its shiney :cry: :gtfo:

At least its shiney

Gotta love that BLING BLING effect.

Mate, $200 and there yours..... :bowrofl:

As for the so called deadspot, my car mustve been a lucky one as i have never suffered any deadspot (other than hitting the rev limiter).

Likewise...

The only time I ever started noticing a dead/flat spot under 3000rpm is when my Oxygen sensor started playing up. Replaced that and no more problems.