Couple Of Problems With My Type R.

[cal_type r]

Hi guys.

Jus fitted all my new brakes lastnyt and when out for a steady drive, first time out of the garage in 3 weeks, ive missed it.

While it was off the road i fitted a new maf sensor and a different fin into the hks bov which is supposed to increase the sound. ( Childish i know but hey!)

Before the car was tempramentaly kangarooing especially after the second startup of being out like i would push the throttle down and therd be nothing the suddenly it would come alive and go. I thought and was told it was the maf sensor but its still doing it so what else could it be? As for the new hks fin its shut the bov right up to nearly nothing and given me a load of turbo chatter!! Gona change it back to the original and see if that helps.

Any help hugely appreciated guys

Cheers

[cal_type r]

Just changed the fin back to the original and its seems to have sorted it. Strange though i thought the purple one was the louder but it must be the gold one.

Ive checked for fault codes in the ecu via the diagnostic plugs but its coming back with no faults

Not sure if an ecu reset would help but im stuck for any other ideas.

[colin_ross]

When the maf semsor goes it can take the lamda sensor with it, thats what happened on my type r anyway. Symptoms were jerky reponses when on part/light throttle.

Disconnect the battery overnight, put it back on and see if the check engine light flashes to indicated a problem.

[cal_type r]

Ecu is still showing nothing, it has to be either the Lambda sensor or the tps, guess ill just have to order both

[StewartyBoy]

Hve you not got a multimeter to check them first? Strange that the ECU throws up no fault but your going to replace sensors without being sure. Have you got a standard recirc valve you can drop in?

[Big 'D']

Unplug your o2 sensor go for a drive and see if the symptoms go away if so it is your o2 sensor if not it is something else.

Cheers Iain

[StewartyBoy]

Unplug your o2 sensor go for a drive and see if the symptoms go away if so it is your o2 sensor if not it is something else.

Cheers Iain

Thats not right. If you unplug the 02 sensor the car is going to run rough and display the fault light as a vital sensor is missing. Only way to trully findout if its the problem is to swap in a new sensor. The only reason the MAF may not have thrown up the light is because it has an intermittant fault i.e its still functional, it just isnt relaying the correct parameters of 02 for the ECU to decide what fuelling and ignition timing is needed.

Edited June 7, 2009 by StewartyBoy

[Big 'D']

Thats not right. If you unplug the 02 sensor the car is going to run rough and display the fault light as a vital sensor is missing. Only way to trully findout if its the problem is to swap in a new sensor. I suggest trying someone elses before buying one were possible.

Incorrect, it actually shows no code try it you will see I try not to give out duff gen, it will run on a base map on the ecu if it runs better it is the o2 sensor if it makes no difference it is someting else, a faulty o2 sensor will rarely show as a fault code either, but if you dont trust me swap it out or get the voltage checked.

Cheers Iain

[Big 'D']

You can try this with the MAF sensor too but it will show the CEL light, again if it runs better your MAF is faulty and if it makes no change your MAF is ok.

Cheers Iain

[cal_type r]

The saga continues guys

Got the car out of the garage tonight to give it a clean up and checked the ecu again as i could tell by reving it lightly on the spot the throttle response was iffy and its showing faults with the throttle position sensor an the maf sensor!!!

Surly the new maf isnt bust already!? Ive got a new tps on the way but would a faulty tps cause the maf to read faluty too, just they must be linked somehow surly?

Thanks very much for the help btw guys, guess i can rule out the Lamba now though.

Cal

[Big 'D']

The saga continues guys

Got the car out of the garage tonight to give it a clean up and checked the ecu again as i could tell by reving it lightly on the spot the throttle response was iffy and its showing faults with the throttle position sensor an the maf sensor!!!

Surly the new maf isnt bust already!? Ive got a new tps on the way but would a faulty tps cause the maf to read faluty too, just they must be linked somehow surly?

Thanks very much for the help btw guys, guess i can rule out the Lamba now though.

Cal

If the voltage output on the throttle position sensor is not linear or correct that would cause hesitation/running issues, I would ignore any other sensors until the TPS is sorted mate

Cheers Iain

[cal_type r]

Think thats a good plan Iain.

Total pain in the ass though!

[Big 'D']

Think thats a good plan Iain.

Total pain in the ass though!

The TPS will need to be set up when you fit it to the engine too mate, needs to be 0.5V +- 0.3V when throttle is fully closed and 4.3V +- 0.3V when fully open, it should be set up in the fully open position so you are aiming for the 4.3V +-0.3V.

Cheers Iain

Edited June 8, 2009 by Big 'D'

[cal_type r]

So how do you actually set it up?

[Big 'D']

So how do you actually set it up?

Easiest way would be with a computer with ecu access link or the select monitor (subaru ecu tool), you can do it manualy by reading the voltages off the connectors on the back of the ecu with a volt meter. I can give you plug and pin idents if you want to try that, then you would fit the new TPS loosely and get someone to depress the throttle fully then adjust the TPS until you see 4.3V at the ECU then lock off the TPS adjuster screws and allow the throttle back to idle and check that voltage is 0.5V, function the throttle a few times to ensure the adjustment is correct and to ensure the voltage is linear ie does not jump around.

Cheers Iain

[cal_type r]

If you could give me those plug and pin idents Iain that would be hugly appreciated?

Got a tps on the way so ill crack on with it as soon as it comes.

Cheers Cal