Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[neal]

A friend of mine recently replaced the O2 sensor pre cat, as the car was running poorly, he then reset the codes and for about 1 hour all was well. He has  now replaced the mass airflow sensor and again he reset the codes, the car ran for about 60 miles and O.K. but now the emissions light has returned although the car is running fairly well I am still concerned. Has anyone any suggestions.

[Auto Addict]

Can you get the codes read (needs a TechII or equivalent).

[neal]

Faults on codes showed mass airflow sensor and autobox sensor,this was shown at a garage prior to the new maf being fitted.

[Auto Addict]

What are the symptoms?

Poor starting?

Limp mode?

[neal]

To quote Victor Meldrew "I don`t believe it" , the light has now gone out and the car seems to be running well. a mystery or what. Many thanks for your post I`l see how it goes unless you can possibly shed some light on this.

[Marks DTM Calib]

Well, follow the maintenance guide on cleaning the breathers ond throttle body anyway....

[neal]

Well obviously I spoke too soon, the light is back on but it seems to be running O.K. any thoughts

[mark.adams]

EGR valve? Cap it off
Throttle body? clean it
Breathers? Clean them

[neal]

When you say cap off EGR, what do you mean? Bare in mind I`m not as familiar as you Thanks

[mark.adams]

I'm not familiar at all, just a novice.
Theres a how-to on here somewhere, involves removing egr valve, replacing gasket with a circle of metal cut from a coke can so inhibiting the egr valve from recirculating any exhaust gases without disconnecting the elelctronics from it.

[neal]

Is it safe to cap off the EGR on a 2.2 or will it cause some damage, because why is it their in the first place.

[neal]

Well here we go again, the emissions light is back on, but she seems to be running o.k.
1. I have replaced the lambda sensor pre cat.
2. I have replaced the MAF
3. I have cleaned the throttle body and breathers as per maintenance guide, I found loads of mayo and cr..p in the pipes, but something I can`t understand is when you say follow the guide, why then dont you have to clean out the rocker cover, surely this must have cr..p in it if the pipes/tubes either side are choked with mayo, or I am I being totally ignorant?
4. Would it be any advantage to block off the EGR as described in another guide and could this prevent the light coming on?
5. My last question is ,why do all these faults occur or are they just the norm for a vx, as this is my first vx, I think the car is great but I am slowly loosing it?

[Auto Addict]

Does it start first turn of the key?

[Gaffers]

Well here we go again, the emissions light is back on, but she seems to be running o.k.
1. I have replaced the lambda sensor pre cat.
2. I have replaced the MAF
3. I have cleaned the throttle body and breathers as per maintenance guide, I found loads of mayo and cr..p in the pipes, but something I can`t understand is when you say follow the guide, why then dont you have to clean out the rocker cover, surely this must have cr..p in it if the pipes/tubes either side are choked with mayo, or I am I being totally ignorant?
4. Would it be any advantage to block off the EGR as described in another guide and could this prevent the light coming on?
5. My last question is ,why do all these faults occur or are they just the norm for a vx, as this is my first vx, I think the car is great but I am slowly loosing it?

As it is intermittent.....

Check the wiring going to the MAF and the EGR, look for wear and possible poor contacts.

[neal]

 I forgot to say many thanks for past info and I think this is an amazing forum. Yes it always starts first time and runs well. No I have`nt checked the connections at any of the electrics but I will tomorrow weather permitting.