Hi Hope someone can shed some light on a problem I have with a Marea JTD. The wife when shes out and about complains of the car running sluggishly and on occations having torouble pulling away. Every time there is a light on on the dash which i am told is an injector warning light ??. I was told to run some fuel system cleaner through but the problem is still there. Any ideas much appreciated.

The injector warning light is telling you that the ECU is detecting an issue with the information being sent to it from the sensors. Chucking fuel cleaner in is not going to fix this issue as it's electrical. Every time the injector light comes on, it logs a fault in the ECU. You need a garage to read the logged fault codes to find out exactly what the problem is.

If it was mine, I'd check all the connectors on the engine harness were clean and secure and also clean up the engine speed/postion sensor before forking out any money with a garage.

Also, it may be worth doing a compression test yourself if you can before going to a garage; I had the injector warning light on sometimes in a previous Marea and sluggishness accompanying it, and it turned out to be a cylinder compression (valve) problem.

You did a compression test on a common rail diesel engine? Where did you plug the gauge into - injector or heater plug bores?

Low compression still doesn't explain why the ECU is flagging up an issue - The progamming isn't that clever.

foget about the compression test take the car to the garage and get it check out. dosent have to be a fiat garage a lot of garages can check this out just ask before hand, saves money in the long run

Thanks all. Think I will take it to a local garage and let them sort it.

Problem you describe can be caused by a few things, egr valve stuck open, air flow meter and turbo control solenoid or variable geometry turbo vanes sticking. Airflow meter normally is not effected by temperature, neither is the solenoid, egr and turbo vanes are. If its egr the vehicle normally is totally flat at anything below 2000 revs then will sudddenly pick up power through the revs. Its a common problem, especially with cars that are driven gently.

Some good suggestions however they would most likely not log a fault into the ECU and in this case we're getting the injector warning light on.

It'll be interesting what the fault codes tell us.

Thanks for all your ideas. Its booked in tomorrow at a local garage that can talk to Fiats. Will let ya all know what that throws up.

Low turbo pressure is the error that is recorded, as the ecu cannot see an increase in turbo pressure that is expected.

Had word back from Garage. The error recorded was (Error throttle possition 1 light off) they cleared the memory and have told me to drive it round till it happens again then take it back because they cant isolate the fault????

Fairly rare error this but it is usually due to the connectors on the throttle pedal, remove the connector and tighten the terminals and secure wires with insulating tape to stop vibration of the wires transfering to the terminals.