Oh Dear.. *Urgent*

[sdminus]

I think the valves you speak of are pcv valves. i think im correct in saying if they stick open they are a problem but if they stick shut it dont matter. They are normally closed when the car is off idle. you maybe correct in what you say. if they are stuck open you will continue to get a zorst recirculation at higher rpm.
scott

[K1HKS arse]

Sounds like the car is in "Limp Mode" for sure,if you rev the car real gentle it will pick up to around 4000rpm but if you rev hard it holds back,sounds powerless up till 4000rpm?.When you get a fault and the ecu doesnt receive the correct readings/figures it will go into limp mode.Basically it is fixing the timing and fuelling at set amount for you to be able to "limp" the car home.You can try removing the earth off the battery and sit with the brake pedal depressed for 10 minutes, this will clear the ecu of any fault codes.If the car runs ok after then it was or is an intermitent fault,if it is the same then you have got a problem.
Do all your gauges work,read correctly?Have a quick look over engine to make sure all connectors,pipes are going somewhere,none hanging lose or not connected.
Hope this helps.

Gary

[Rixio]

none of the hoses or anything are dissconnected on mine im gona try the brake thing to reset the ecu now but is this the correct way to reset the ecu?(never heard of it before) if it still does it after what does that mean?? anyway ill repot back when iv tried the brake thing...luciano u had any luck m8y??


rixio

[Carl]

The brake thing is only needed to be done for 10 seconds(I Think that is what Gary meant),it completely drains all power from the ECU if the battery is disconected first.
When power is reconnected the ECU should revert back to normal operating provided there is nothing else wrong.
Kind regards
Carl

[Rixio]

so i sat there in the car for 15 minutes when i coulda done it for 15 seconds!!!! omg!!! anyways IT WORKED!!!


ITS ALIVE ITS ALIIIIIVE


THX FOR UR HELP DUDES COULDNT HAVE DONE IT WITHOUT U!!!

now iv got put all the dash back on!! ack!!!


rixio:wave

[Luciano]

I will try resetting the ECU now, but I\'m a little worried for two reasons:

1) Presumably the car went into limp-home mode for a reason? Is it okay to carry on driving before I\'ve found out why?

2) What if it happens again somewhere between Birmingham and Newcastle!  

Anyway I\'ll go and reset it now and see how the car runs.

Thanks again

[Luciano]

I reset it, drove the car up the road - everything was okay, but then at the end of the road the car went back into limp home mode again.

So its now the same as before.

When the car was running normally just now, it did still backfire a little when you took your foot off the accellerator, not sure if that gives any indication of whats wrong?

I think I\'ll try and read the fault code now..

[Rixio]

how long did u keep braking for?? i spent a good 15 mins on it so it might be that dono but if it only takes 10-15sec then sry no can help...try asking a local mechanic otherwise im fresh out of ideas...sry m8. hopefully ull sort it though


rixio:wave

[Mark C]

Originally posted by Luciano

When the car was running normally just now, it did still backfire a little when you took your foot off the accellerator, not sure if that gives any indication of whats wrong?

Think thats normal when they are first started, at least i hope it is as mine does it for the first couple of mins, till it starts to warm up.

Other than that sorry i have no idea, hope you get it sorted ASAP.

Mark

[JayDee]

The two things that put it in limp home mode are the charge control and oil metering pump.
You can check the charge control actuator by turning the ignition on or starting the car it should get pulled in when you do this, the actuator is the small one on top of the Y pipe.
Also check the crank angle sensors, give them a clean if dirty.

Jason

[K1HKS arse]

Yes check crank angle sensor connections,had that problem myself although it tends to stop car from starting,wont even fire.
Oil metering pump connector is another good place to check,look in front of oil filler neck you will see lifting eyelit.On the side of that is a big plug connector approx 8-12 wires.Pull plug apart and clean connections with switch cleaner,if not brake cleaner or plug that goes onto metering pump itself bottom left front corner of block just below front turbo oil return.If return is leaking it will oil up connector causing a resistance.
On the back of water housing is a single wire sensor for water temp to ecu,check that also.
How long did you drive it for,any particular moment it started to happen.e.g - just off cold start,same amount of time everytime from starting to problem arising????Could help in finding the problem,as much info as poss.

[JayDee]

Originally posted by K1HKS arse
Yes check crank angle sensor connections,had that problem myself although it tends to stop car from starting,wont even fire.
Oil metering pump connector is another good place to check,look in front of oil filler neck you will see lifting eyelit.On the side of that is a big plug connector approx 8-12 wires.Pull plug apart and clean connections with switch cleaner,if not brake cleaner or plug that goes onto metering pump itself bottom left front corner of block just below front turbo oil return.If return is leaking it will oil up connector causing a resistance.
On the back of water housing is a single wire sensor for water temp to ecu,check that also.
How long did you drive it for,any particular moment it started to happen.e.g - just off cold start,same amount of time everytime from starting to problem arising????Could help in finding the problem,as much info as poss.

Nice write up, you like typing more than me!:rollin
I think one of these should sort his problem.

[K1HKS arse]

Just like to help out if possible? If it fixings problem its nice to know i have helped a fellow enthusiast and that i have actually learnt something about rex\'s in 4 years!!!!!!!!!!!!!!!!!!!

[Luciano]

Just to confirm:

When I start the car, approximately 70% of the time it goes immediately into limp home mode.  the other 30% of the time, it drives fine for 100 metres, and then goes into limp home mode.

I have now left the car behind, and I\'m back in Newcastle now...  

Thanks a lot for all the suggestions - keep them coming.  When I go back to the car (probably in a week or so) I\'ll have a list of things I can try - all thanks to you guys... so cheers.

If the suggestions from this thread don\'t work, I\'m going to take it to a specialist..  

Will update you when I\'m back with the car and have tried out the things mentioned above.

Thanks again!

[rx7aberdeen]

The cat on the car may have collapsed!  happened on my rx when i first got it totallt restricted the running of the car and sorted after, also check this;  If you look at the engine just before the inlet manifold a small black box in the middle of the engine take that off and check the two small hoses are connected this again happened on my rx and meant that car drove fine until it was time for the second turbo to take over!  Dont know if it will help but good luck anyway!  there is nothing worse  than a car running poorly!!!!