I know this issue may have been covered in a previous thread but I cant find excactly what im looking for so I hope that by starting this one I may get some better advice. Here goes:
Ok, recently i have had issues with the engine idle dropping from 750 to 500 rising to 1000 then back to 750 again, this process repeats over and over without ever settling.
In relation to the idle issue, there was a juddering that occurred during low rev gear changes or power inputs very annoying.
I have had a diagnostics check carried out with the following codes:
As a result I have since had the car serviced and a few component changes:
Oil and Filter Change
New Air filter
EGR Valve (new)
Rear 02 Senser (new)
Mass Air Flow Meter (new)
The codes were cleared but the problem still exsisted.
Yesterday I fitted a new exhaust system (Scorpion Exhaust with Twin Back Box conversion, during this process i decided to remove the Throttle Body and and related hoses to clean them, after doing so and to my delight the original problem amazingly cleared, however
Since doing so i have noticed the idling problem has returned with an added problem, whilst carrying out gear changes and pulling up to lights for example the engine rises to 2000rpm sits there for 20 seconds or so then returns to 750/500/1000/750 etc
really annoying problem just when i thought i had cracked it
The engine model is Z22SE non-direct and has 96'000 miles
Any ideas ?