need a bit of advice
My car is hunting but not on idle if you give it a little throttle and hold it at about 2000rpm the revs go up and down by 500rpm and the exhust note changes. Any ideas?
Cheers jamie
don\'t know, is your\'e air con turned on,
no not at all mate no electrical load. The exhust note sounds like its shooting a flame you know the noise as you lift of after giving it some down the motorway and give it atiny bit of throttle.
I know used to do the same, but it did stop on its own after a while.
Exhaust leak or faulty TPS may be
Scott
What mods are you running? :wiggle
The only mods im runing is a blizt cat back system still have orginal down pipe and cat but its slightly blowing before the cat at the joint. Standard air box i think the ecu has been played with as there is no speed limit or REV limit scary and it has a ks rom sticker on the front of it. I have removed the double throttle since then the car has been playing up.
I am sure one or more of the tuners will post but i would advise that you give one of the supporting tuners above a ring. I had a problem with my fd early in my modding with hunting it turned out that it was down to after market ecu,not the Apexi i now have fitted, that was causing turbo spike to 1.1 bar and it damaged the side seals. Be careful and get some expert advice. HTH. :wave
Reckon it is about time you joined this so.....exclusive club!
Then we\'ll take off the special device we have planted on your car that does what you are saying.
Regards
Carl
See told you a tuner would turn up. Better than buses. LOL. :wave
ok i will join as long as you come and fix my car for me lol
Im having nothing but prob with my new fd only had it two weeks and had to change the clutch the rear suspension is knocking all over the place and need a respray.
But i love it so much fun and the handleing is amazing my r32 gtr that i got up to 500bhp was just undriveable sideways everywhere.
But watch this space my fd will be a mean ass mo fo soon
Warthog what mods have you done as you have the power that im going for.
WARTHOG.
1994 RX-7 FD3S.
Street Ported HURLEY engine with 3mm Racing Tips, running Stock Twins, HKS Exhaust with FEED de-cat mid-box, HKS Induction kit, APEXI ecu + commander, Bosch 044 Fuel Pump, 1300cc Secondary Injectors, GREDDY Pulley Kit, PWR Radiator, PWR Charge Cooler Kit, Plugs 2x10’s and 2x11’s, Magnecor 10mm ignition leads, GREDDY Boost controller, Blitz Turbo Timer, XTREME Single Plate Clutch DSB_XHD, Lightened Flywheel and counter balance, RE:WORX Diff Brace, RE:WORX Gearbox Brace, RE:WORX Swirl-Pot, RE:WORX Water Injection Kit, FEED Engine Brace, B&M Short Shift Gear Stick, TEIN Adjustable Suspension, Front 235/40/ZR18, Rear 265/35/ZR18 Dunlop Super Sport Race Tyres.
Have just had the engine re-built by Geff @ RE:WORX. The standard port has not been touched as would seem by calling the engine street ported, as in enlargement, but the ports had been polished very nice job too. Geff has removed all the Hurley bits on my instruction. We will see what power we can make on the 27th Sept at RE:WORX Portsmouth on the Dyno. If you are free pop down. If not I will be at SantaPod on the 3rd Sept for the test and tune day where I will be going after the 1/4 mile British Record for Stock Twins. Sdminus -- holds it at the moment and he is going to try and join me so we can go head to head and push the envelope. :wave
I woudl be honoured to come and see you go down the strip mate. What colour is you beast then?
Montego Blue. The one that flips so it looks dark blue or dark green. :rollin
Madden. Sounds like you need some help son. Bhp is for show. You gotta get it to run well first son. mail me sdminus@yahoo.co.uk.
Scott
Bring it on-----See you on the 3rd Scott I have my tickets and I will be there, :spank will you??
Is that the sound of SILENCE I hear. :yes .
Well Scott, are you going to join me and let Madden see some fast Twin Turbo FD\'s fly up the strip and try and break into the 11\'s. Thats why I\'m going on that day. No Chav cars on the strip, quick turn around. :3gears-lh .
BRING IT ONNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN :evillaugh .
John. I have other things to do on a sat nite son...
As i said before on FDUK. I will try and make it. but work comitments must take a priority over this.
As for bring it on ???????????????? How odd!!!!!!!!
So far you aint even the 3rd quickest twin so surly you are the one who has got all to prove. Im not in to my dad is bigger than your dad comps. but i will try to attend this event.
may be i should give it a miss to give you a chance to get something worth racing.
Any way im bored of this conversation now. I will see you on the strip my son.
Have a good day
Scott
I\'m looking forward to it already. :god
Warning, warning - MRC turning into AusRotary :)
Yea i will have to get it running propley first . Im doing all that now but when i get a bit of money i will start modding it.
So the 3rd it is then see you there
You guys need to get a room!
Quote from: Maddenneed a bit of advice
My car is hunting but not on idle if you give it a little throttle and hold it at about 2000rpm the revs go up and down by 500rpm and the exhust note changes. Any ideas?
Cheers jamie
Does it drive ok? does it smoke much/a lot?
no fine mate boosts up fine aswell. The only prob with driving is when you are in first gear at light throttle just crawling as you lift of the car seems to have massive engine breaking and then you apply the throttle again the car jerks foward. never done that before. Its done this since i removed the double throttle. Also i had to readlust the idle as well it was well high after romoving it.
Try another TB quick, should help nail down where the problem (leak?) is?
just fixed the exhust leak that has help alot but is still hunting when you hold the revs still. I doesnt do it striaght away it takes a while to make it do it all the way thought the rev band but not at idle. Doesnt happen when driving either. Checked for air leak by spraying wd40 around all the gaskets and pipes no rev change. very strange.
I have check the throttle bodie gasket and it is nakered has been broken before but not leaking. One of the one way check valves is nakered as well.
So i will try that and at the same time do the rats nest with nice new hoses.
Any other ideas ?
Cheers for all your help
Jamie
Quote from: MaddenI have removed the double throttle since then the car has been playing up.
Do you mean it started playing up after you removed the Secondry Throttles?
Did your Idle go higher (when it was warm) after you removed them?
yea it hapened after removing double throttle and the idle went higher from warm. I have adjusted it down again but it hardly has any more adjust ment in it. The ass screw is all the way in and the tas screw is nearly all way out.
Check for air leaks mate. Have you blocked all the Air pipes etc off?
The revs should\'nt realy go up too much on idle when warm. They usaly drop when cold so you have to rase the Rpm so it don\'t stall all the time.
So if the revs go up when its warm it means there is more air getting in somwhere.
yea i have checked all the lines and everything is alright i have got it idling at 850rpm and it sits there fine now. its just that hunting when i hold the revs at around 3000rpm but not under driving conditons
Check tps switch is still in range.How did you adjust the idle????If you use screw on front of throttle body near throttle cable you can put tps switch out of range slightly which will cause it to hunt.Depending on how it is adjusted will cause it to hunt either at idle or up the rev range like you have described.Its a real arse to get it to stabilise again.
Do you have Power FC???????????
now i havent tried that will check that today. How do you check the range mate or should i just use the manual? no power fc just some **** ecu that has been chiped to remove the speed and rev limiter. Where is the stock rev limiter kick in
Just check out the tps and it was out slightly so adjusted it to within its range and its still happening.
Very confused now
Anymore ideas?
Cheers Jamie Madden
Compresion test?
yep it pulled high 7s all round mate.
Ok, I just saw somthing on the Us Forum about a side seal faiure that did exactly the same thing, but that came up as one of the three on the back rotor was down.
you scare me lol No the engine is runing fine at idle not a prob reving or driving spot on . It is really wierd it doesnt do it striaght away either you have to hold it there for about 3mins before it starts hunting. I thought i heard the air con keep cuting in as well not sure. Can the air con clutch become activated even its all turned off?
Duno, Maybe its somthing as simple as its set up a bit too rich at 2000rpm so when its not got load on it your seeing overfueling symptoms?
Have you ever had it rollered?
No mate only picked it up 2 weeks ago. just started playing around with it got a few thing to do first on it and then im on the rollers.
I have a few bits coming from mazda this week so i will do that and then see what happens. Got a couple of check vavles coming and some manifold gaskets aswell hopefully that will sort it out
Cheers for all you help guys . One of the best forums i have ever been on
Any more ideas welcome
Jamie
Was it the air-con cutting in or just your 2nd fan.??????? :wave
could be that mate cheers for that clears another thing of the to check list
Try replacing the tps switch?????????One you know is good,from a mates car maybe to save you buying a brand new one straight away.Worth a try,tps switches are a common problem.
The thing that is cutting in and out at around 3000 rpm will be the air pump.It siwtches off around that rpm and above.As soon as you go above a reasonable idle speed with the accelerator pedal it should cut in too.
If you get a mate to watch it you will see that is the case.
Take the wire off from the back off the air pump and see what happens.
Regards
Carl
Check the airpump while idling(the centre should be spinning), I have had one that was cutting in and out just before it siezed!, this would cause hunting.
Jason
Quote from: Maddenyou scare me lol No the engine is runing fine at idle not a prob reving or driving spot on . It is really wierd it doesnt do it striaght away either you have to hold it there for about 3mins before it starts hunting. I thought i heard the air con keep cuting in as well not sure. Can the air con clutch become activated even its all turned off?
it is making alot of noise liking grinding. Can i just remove it and get a different belt. Still runing the cat though. If i unplug it will it mess up the ecu and put it in limp mode or anything or can i just leave it upluged?>
Cheers Jamie
You can unplug it, but you may have to adjust the idle up a bit using the screw on the throttle body. It is suppose to kill the cat if you do not have the pump connected, I do not see why as other cars run without a pump and it turns off at 3K anyway.
Jason
Will be removing cat soon anyway. So its safe to just unplug it cool
Cheers For all you help
Jamie
hello have disconected the air pump and now the car is hunting on idle. The clutch on the aor pump is shaged as it still catchs tiny bit even with its unpluged?
Drop your idle now,the ecu is trying to settle it,but the screw will be too high,so they are both fighting each other.
If you are decatting then take the airpump off and run a shorter belt.
Don\'t forget that if you run no cat you may need an ecu upgrade.
Regards
Carl
hello i have tryed adjusting for idle at it wont stop hunting at idle runing really bad. I have pluged it back in again it all is fine. why would the car be hunting with the air pump disconected?
Cheers
Jamie