i need help asap please

[chadmustang]

hi everyone i have an fto v6 auto,i have it for nearly a year and never had a problem i love it but about three months ago the car started acting up high revs at idle and when driving the car would start to jerk even when slowing down,i first tought that it was an air leak but couldnt find anthing,i clean the trottle body and the stepper motors,i did a bit of research and found that the idle control stepper motor gives terrible trouble,so i ordered one and put it in the other day,the car has stopped jerking wen driving but still goes up to at least 4000revs at idle and when im driving the cars seem to have a mind of its own like the revs stay at 2000 and builds up speed to 80km without me touching the pedal,im lost all i can think of is that its a gearbox trouble or that its the trottle body itz self,mind you when i fitted the stepper motor it was idling at 900rpm,is there anyone who can help me as the car is getting dangerous and my foot is constanly on the brake pedal trying to slow the car,i miss my fto i just want here back hhheeeellllpppp

[Daz]

Hi Chad,

could be a number of reasons for this to happen i'll go thru a list of things to try and check and see how you get on from there,

Firstly perform an FSR, while that is taking place clean or replace you air filter, Now i know you said you have cleaned and replaced your idle stepper but my advice the one you got probably a recon so clean it again and not just a rubdown take apart and clean.

Next inside the car look down into the pedal box you'll see that the accl pedal is on a pivot with a spring, check spring is still around the shaft holding it back against the dead stop about 2 inches above the pivot. if this is so push the pedal down and release a few times making sure the accl cable is moving thru the bulkhead fitting smoothly, If not moving smoothly check cable see if it is kinked and catching if ok move back into the engine bay.

Next in the egine bay check the bracket at the back of the headders ie this.


make sure cable hasn't slipped out and catching on the bracket. if so fit it correctly if ok move on to the throttle body, At the back of the throttle body is the butterfly valve control, check that the cable is seated and connected correctly.

If all of the above is ok then i'd try two more things.

Firstly on the throttle body there is a deadstop for the butterfly valve control, its directly below it about 3/4 of an inch check to see if the lever coming from the control is resting against it or if this screw has worked its way loose. if it looks ok take the car for a spin and really heat up the engine say 15 min then when you get back home check your idle revs this should be about 800 rpm if its high say the 2000 rpm you mentioned earlier get someone to sit in the car and call out the revs while you back off (adjust) the deadstop till you get it holding at 800 rpm

If this was ok anyway then i can only suggest the sencond thing to do which is remove you accl cable altogether, sometimes they can have rust spots or kinks on them in places you cant see and stick against the outer sheaf, the only way to find out is to remove the cable and visually inspect it all, if rusty or kinked i'd replace it.

If all this fails there are several adjustment screws on the throttle body but i reccomend you leave them alone.

If you haven't found out the cause after that lot well i'm stumped you'll have to get a more knowledgeable person to help ya.

Daz...

[Daz]

Hi Chad,

could be a number of reasons for this to happen i'll go thru a list of things to try and check and see how you get on from there,

Firstly perform an FSR,

Sorry while reading it back i realised i had my engineering head on FSR is Full system reset. or in laymans terms disconnect the battery for 30 odd min to reset your ecu's

Daz...

[chadmustang]

hey thank you so much for getting back to me so quick but i no this is going to wrecked your head,i already done a FSR because i wanted to recharge the battery and i first tought it was the cable but while i was driving it i would try and pull the lever back with my foot but there was no movement the car would stay at 2000rpm but when i put the car into neutul the revs would shoot up to 4000rpm.i brought this into my garage and check the butterfly to seee if it was the cable but there was slack in the cable and the was slightly close as it shud be wen at idle,HOW MESSED UP IS THAT.i going to go through your checks on this cable because i no and u probaly no its goin to be somethig very STUPID HAHA but wat is so confusing is that when the car heats up and im driving the revs are at 2000rpm and if i pull over and select neutral the revs shoot up and i mean shoot up like i have my foot down on the accellator up to 4000rpm,i has to be the cable doest it?????????

[Daz]

When was the last time your Tip box got serviced? if its been awhile do a fluid and filter change but don't just drain and refill, drain and leave the plug out and leave to stand overnight even 24 hours if you can, as it takes ages for the old fluid to leave the capillaries, usual fluid change you'll get about 6-6.5 liters of fluid out, box holds 7.5 liters so this helps get rid of all the old crap out of it, i think forte do i flush if i remember right try looking on the net for some of that aswell, again if this doesn't do it for you maybe next week when there are more owners online they might have better ideas.

Daz...

[Daz]

infact here is the forte product had a quick look myself, maybe camskills sell it if you local motor factor doesn't

http://www.forteuk.co.uk/Automatic_transmission.htm

Daz...

[chadmustang]

cheers man was tinkin about doing a change i heard that the box goes abit mad if the oil hasnt been changed in a while please god woorrkk

[CJ]

Chad, you should undertake a diagnostic test to see what the sensors come back with, see here: http://www.ftowa.com/html/workshop/workshopart07.html

CJ