engine is hunting

K1HKS arse · August 16, 2005, 12:09:47 AM

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?

?

Madden · August 16, 2005, 06:29:08 AM

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

Madden · August 16, 2005, 06:11:09 PM

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

Grizzly · August 16, 2005, 06:16:32 PM

Compresion test?

Madden · August 16, 2005, 06:20:08 PM

yep it pulled high 7s all round mate.

Grizzly · August 16, 2005, 06:25:18 PM

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.

Madden · August 16, 2005, 07:31:25 PM

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?

Grizzly · August 16, 2005, 07:39:14 PM

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?

Madden · August 16, 2005, 07:43:20 PM

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

Warthog · August 16, 2005, 07:47:14 PM

Was it the air-con cutting in or just your 2nd fan.

? :wave

Madden · August 17, 2005, 06:29:43 AM

could be that mate cheers for that clears another thing of the to check list

K1HKS arse · August 17, 2005, 07:20:33 AM

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.

Carl · August 17, 2005, 08:14:12 AM

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

JayDee · August 17, 2005, 09:29:06 AM

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?

Madden · August 17, 2005, 03:05:59 PM

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

engine is hunting

K1HKS arse

K1HKS arse

JayDee