Car Help Pls.!

[raj]

this is regarding the car i use for taxi hire, its a 02 toyota avensis.

what areas should i be looking at to source the problems its having?
problem is that it will randomly start hunting! the revs will rise and fall between 500 and 1000 rpm.:scratch:
sometimes its fine but more than often it does the above.

[Alastair]

It will probably be a sensor, try coolant temp sensor...

[raj]

It will probably be a sensor, try coolant temp sensor...

how would a coolant temp sensor effect the idle and cause hunting:scratch:

[R5GTTRaider]

by the car not knowing the temprature of the engine to ajust the fueling correctly??

[raj]

by the car not knowing the temprature of the engine to ajust the fueling correctly??

ok thanks:agree:
any other areas i can check?

[R5GTTRaider]

vacum leaks

always a major player in hunting, or tps

check all vacum hoes and any spilts AFTER the afm in the inlet pipe

after that then itll be a dignosic check, think there moble guys that charge ?£40 for the first hour and 25 after , but with what can be said to be a simple problem could take less then a hour, but if theres no error codes your be lost even more,

[Scoff]

check for air leaks, cracked pipes, that kind of thing.

have you had diagnostics on it ? is it throwing up any fault codes ?

[Scoff]

oops, I was a bit slow that time :laugh:

[raj]

vacum leaks

always a major player in hunting, or tps

check all vacum hoes and any spilts AFTER the afm in the inlet pipe

after that then itll be a dignosic check, think there moble guys that charge ?£40 for the first hour and 25 after , but with what can be said to be a simple problem could take less then a hour, but if theres no error codes your be lost even more,

thanks for that bud:agree: will give it a good look over.

[raj]

check for air leaks, cracked pipes, that kind of thing.

have you had diagnostics on it ? is it throwing up any fault codes ?

not done a diagnostics check yet, was hoping to try sourcing the prob before spending money on it. also im assuming a buggered lambda sensor can cause this prob too?

[Sparkie]

you can use any OBD tool to have a look at it as its after 2000 and a petrol model. this should then tell you which area to start looking in.

[Frix]

not done a diagnostics check yet, was hoping to try sourcing the prob before spending money on it. also im assuming a buggered lambda sensor can cause this prob too?


this is the first thing i would check Raj!! lambda sensor is more than likely your problem!! :)

[Tiny Tim]

I'd check the idle control valve as well.

[TURBO'D CLIO]

I'd check the idle control valve as well.

Agree, give it a clean with carb cleaner or brake cleaner while your at it to...