Significant yes. Try cleaning all the sensor terminals see what you get. Maybe a combination of bad signals. Worth a try.
Significant yes. Try cleaning all the sensor terminals see what you get. Maybe a combination of bad signals. Worth a try.
Thebest4x4byfar
New Member
Thanks Wammers
Will give your suggestions a try and yes diags on the way for the future
Thanks Wammers
Will give your suggestions a try and yes diags on the way for the future
You may like to take a look inside the ECU for moisture ingress and contamination. Carefully though.
Thebest4x4byfar
New Member
You may like to take a look inside the ECU for moisture ingress and contamination. Carefully though.
yep i'm up for that and a job i can do in the dry as rain has stopped play, will it do that squid thing and squirt ink at me
Rick-the-Pick
Active Member
Don't dive into the inards of the ecu unless you really know what you're doing.
For reference, all edc diesel ecu's will run any P38 diesel, they just need to be programmed correctly.
Your 97 ecu will run the 98 vehicle, & vice versa. You'll need the use of a re-syncer to program it in with.
For reference, all edc diesel ecu's will run any P38 diesel, they just need to be programmed correctly.
Your 97 ecu will run the 98 vehicle, & vice versa. You'll need the use of a re-syncer to program it in with.
Datatek
Well-Known Member
The early one will not operate the EGR, no problem with that, but nor will it see the air intake temperature on the later MAF equiped engine, so while it may run, it will not run well unless the earlier air intake sensor is fitted in the manifold.
I doubt if many people on here will have the equipment required to reprogram an ECU. So if he has a pre EGR car he is better with a pre EGR ECU.
Thebest4x4byfar
New Member
Now i'm confused.com
the air intake sensor is bolted in the bottom of the air intake manifold is the 97 egr or non egr ?
Datatek
Well-Known Member
Yours in non EGR and no MAF. The air intake sensor is part of the MAF on the later EGR equiped engine, not in the manifold.
Thebest4x4byfar
New Member
Think inlet air temp on the EGR ECU is a preset to force EGR operation. There is no point in reading air temperature at the MAF as it will change dramatically by the time it gets in the manifold via the turbo. Bit like wearing a top coat in Southampton because it's cold in the Glasgow. The MAF measures airflow for the ECU to control EGR we have been through this before. The inlet air temperature never changes on the EGR engine, if the MAF was measuring it it would.
Datatek
Well-Known Member
So you are now saying that the air temperature sensor in the MAF serves no purpose as well? Doesn't know the difference between minus 20 and plus 40C??
Thebest4x4byfar
New Member
Understood
it's a real learning curve for me and understand that it must be frustrating for the guys on here that know there onions and that's why i'm here to learn
thanks for the continued support also
Where on diagnostics can you read the MAF defined inlet air temp?
Datatek
Well-Known Member
I'll have to look, but the fact that diagnostics don't report it does not mean it's not used. It's not happy with it disconnected.
Makes no discernible difference at all to my engines running with MAF disconnected. Other than diagnostics throwing an airflow fault. No inlet air temperature fault ever comes up. Inlet air temp is always at it's constant preset.
Datatek
Well-Known Member
Hooray, we can all chuck the MAF away
Hooray, we can all chuck the MAF away
If you have disconnected the EGR no reason to keep it.
Datatek
Well-Known Member
Odd that mine does not run well without it then.If you have disconnected the EGR no reason to keep it.
The pre EGR models seem to do ok. But there will be several circuits in the EGR ECU incomplete without the MAF. Fortunately the inlet air temp is not one of them.
