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 Alfa Romeo Spider/GTV 2.0ltr Twin Spark (162.01/323.01) 1996 - 2002
Revs up and down and stalls at idle
Annother very common fault here usualy caused by the idle stepper motor, located on the side of the throttle housing, these units are quite cheaply made and go wrong all the time. The little motor that runns them are not realy up to much. These units need to be replaced to cure the problem, although they do come appart and start working again they don’t usualy last long after, just replacing the part on this management system will not stop the fault by itself as the ecu will still try to compensate for the old faulty unit so it is important that the basic settings are reset with a dedicataed diagnostic tool like the SUN MODIS. Simply reseting the fault codes or disconnecting the battery will not always work.
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Alfa Romeo, all models 1993 - 2004 onwards
Emission Failures -
High CO & low lamna reading. common causes of rich running faults are the lamna sensor or the ECU (engine control unit) both of these parts are relatively simple to check, to check the sensor strip back the insulation on the signal wire from the lamna sensor, this wire is usually black. Then hold the bare wire between your finger and thumb then touch your other hand on to the battery positive the internal resistance of your body will give 1volt at your finger tips which is what the sensor would give out when the engine runs rich, if the emissions come down then you have a faulty lamna sensor or wiring but if the emissions remain the same then the ECU is a possible fault. For more information on ECU testing click on ECU
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High CO with normal lamna reading. If the oxygen level is below 1% then a high CO with a normal lamna reading can only be one thing - the catalytic converter, when ever you get this reading the catalyst should be condemed. But always make sure you check the oxygen level first, if its high (over 1% at speed) then you’ve got a leaking exhaust or engine runing problems.
Alfa Romeo, all models 1986 - onwards
Hessitation, power loss, missfire. This type of problem can be one of the most time consuming faults to find because the problem often is only slight and the fault only shows up when the car is being driven under load. One common cause of this is a fouled or sticking injector.
Models we cover: Alfa Romeo 33, 75, 90, 145, 146, 146TS, 155 Twin Spark, 164 Twin Spark, 164 Spider, 164, turbo, Alfetta, GTV TS, Spider TS
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