I have just purchased a 2wd saff cossie and when its idiling or when driving slow it is jumping about like a kangaroo. when the rev range is higher on a run it is fine. also this car used to be a 4+4 and the lambda is not connected anywhere could this be the problem any suggestions will be appreciated thanks

 

maybe the "used to be 4x4 " may be a clue.. is it possible the wiring loom and ECU are from the 4x4 and the throttle position sensor fitted on the throttle body is a 2wd one?
This would make for some fairly uncivilised behaviour, as the 2wd TPS is incompatible with the 4x4 management..

 

i thought you could swap the 2 outside wires over to make it work, they must be compatable because burtons no longer sell 2wd tps, only 4wd and they advise using 4wd on 2wd

 

oh now im even more confused is there any procedure i can follow to find out if this is the problem

 

No! the 2wd and 4x4 TPS are not cross-compatible, with or without the wire swap, they have quite different characteristics. For example, at Idle position, the wiper on the 2wd PF01 TPS goes open-circuit, the 4x4 PF09 doesn't.

 

Correct Rich.
Burtons are quite simply wrong. And anyway.. i still sell em.. lol

 

Martinmace -
You can only check the components to see what you actually have fitted:

1, ECU - What type do you have? - 2wd L6 is mounted behind the blanking panel in the passenger side dash, it will have 2 mounting lugs either side of the connector to bolt it onto the carrier slide.
4x4 one is mounted behind the glovebox, along with the ABS controller. The L8 4x4 ECU doesn't have mounting lugs on the front, it is plain square and just clips into it's mounting position.

2, Wiring loom - 4x4 loom has 3 large multiway connectors on the bulkhead just above the engine, 2wd doesn't.

3, Throttle Position Sensor (TPS) - mounted on the engine side of the throttle body.. unfortunately the only way to see what is fitted is to remove the throttle body with the TPS attached... 2wd one will have reference number PF01, 4x4 PF09. Either of them could be red or black, so that isn't much of a clue.

 

The TPS has a part number.
L8 and P8 ecu requires PF09
L1 and 6 ecu require a PF01.

Easier to have it put on some decent equiptment though as its not as easy to check if wiring loom matches ecu ok, or wether your software requires lambda control or not..

 

Damn.. beaten in both time and reply quality.. wounder.

 

sorry Stu... i really must stop doing that eh pal.. ?

 

thanks lads i will have a look today and see what components it has. i have found a plug disconnected so plugged it in and it isnt jumping about so bad. but it would be nice to know what ecu etc it is running. is 1 better than the other??? thanks again b in touch later and let u know what its got.

 

where was "the plug"

 

on top of where the intercooler hose goes on inlet, sorry cant be more exact.

 

Idle speed valve? grey plastic and metal cylindrical body?

 

cleaned that and no change. all it is doing is hunting on idle is there any thing else i can do

 

is the base idle setting correctly adjusted?
With a warm engine, disconnect the idle control valve and adjust idle speed to 850-900rpm (adjustment screw underneath the throttle body).
Reconnect idle valve, the speed should not change.

If base idle speed is set too low, the idle speed valve is continuously trying to lift it slightly and that will often cause hunting.

Also incorrect idle CO adjustment can cause hunting (adjustment screw is on the front of the ECU next to the connector)


However, what you describe as "kangarooing" sounds more severe than idle hunting, suggesting something more fundamental is wrong.. Have you identified the ECU/Loom/TPS sensor types yet?

 

cheers rich
im going outside now to find what ecu it has and where.and i will try those adjustments.also yestarday i found that the idle controll valve was NOT connected so i put it back on and it was all ok for a while. it isnt kangarooing as it was the problem just seems to be on idle. let u know outcome thanks mate

 

ecu is behind glove box ,3multipin plugs near rocker , havent checked tps yet but played with idle control screw and the hunting seems to of dissapeared but i cant get it to idle under 1000rpm it idles just a bit much . do i need to adjust the TPS or shall i just set fire to the fkin thing sorry to b a pain it just gets very frustrating as u probabaly all have found out at some stage

 

sounds like you have pretty much a 4x4 setup there.. the ECU if it is 4x4, will have a red label and reference number IAW048/02 (earlier non-lambda version) or a green label with ref. IAW048/01 (later with lambda version)

The wiring loom you describe is 4x4.

You then really need to know what the Throttle sensor is - either by taking off the throttle body and reading the number, or possibly making some measurements with an electrical multimeter if you are up to that.. ?

If you are unable to reduce the idle speed below 1000rpm with the adjustment screw under the throttle body, it's likely you have an air leak in the inlet manifold/plenum chamber or associated pipework, which is allowing air to bypass the throttle... you need to find that too

 

cheers mate ill do that tomorrow. the ecu did have a red label on it but i did not take down the number. if i take my car to interpro as they are only 30 mins away from me can they set my car up properly if it is running 4wd management ??and if it is a 4wd TPS will i need to get a 2wd item instead?

 

if it's a 4x4 ECU, you need a PF09 4x4 TPS to match

 

the ecu is IAW 048/02 (earlier non- lambda version. i am going to check the TPS now i will let you know. also how can i check if it has been chipped or not. thanks

 

TPS is PF09 so i will have to take it for a set-up.also car has a in-car boost adjuster is it normal for the amal valve to be removed when this is fitted, turned it up and let it have it earlier didnt like it much would this be cos its only running standard injectors and standard map sensor???