Miss Fire makes short irregular visits!

[krassegrand]

Since the engine change Zorica has been complaining about missfires and this weekend we drove 680km (I was driving) and I found that it (sometimes) missed out during full throttle and +2000revs. It is like a missed stroke about 3-4 times in 5 seconds. That it is during full throttle and +2000revs makes me suspect something to do with the lambda.
At +2000 revs and full throttle the lambda is not regulating the mix, it has something to do with cooling parts of the engine when working hard.
I have checked for fault codes and there is none!

Jörgen

[madDan]

Re: Miss Fire makes short irregular visits!

Crank Position Sensor hiccoughing maybe?

Flakey plug?

dicky lead somewhere?

Blocked fuel filter?

[krassegrand]

Re: Miss Fire makes short irregular visits!

The crank position sensor is also one of my suspects.
No fault codes though! I would expect fault codes!
The "new" engine is a 80 BHP while the ECU and the injectors is still a 60 BHP
Am I right that the difference between those engines is the camshaft and injectors?

Jörgen

Ah.. Yes the idling is a little uneven to.

[krassegrand]

Re: Miss Fire makes short irregular visits!

Does anyone have the part number for the Crank Position Sensor?

Jörgen

[madDan]

Re: Miss Fire makes short irregular visits!

Turbo is different too.

[krassegrand]

Re: Miss Fire makes short irregular visits!

Yes I forgot that! I kept the original (60BHP) turbo.

Jörgen

[RacingSnake]

Re: Miss Fire makes short irregular visits!

http://www.fq101.co.uk/how-to-guides/fortwo-450/engine/179-crank-position-sensor-change.html

The part number(s) for a replacement part (same for both 600 & 700cc cars):

• Bosch: 0261 210 142
• Merc: A 003 153 95 28

But I would read the codes, see if it is linked to a specific cylinder, and check the coil packs.
Swap them to a different cylinder and see if the error codes follows.

[tolsen]

Re: Miss Fire makes short irregular visits!

Cheapest brand new crank/ TDC sensor outside ebay is still less than 20 pounds from InCar Motor Factors in London.

http://www.incarmotorfactors.co.uk/switches-sensors--other-electrical/12931-meyle-crankshaft-position-sensor.html

21 pounds inclusive of delivery if you live in the UK.

[Thrumbleux]

Re: Miss Fire makes short irregular visits!

missed out during full throttle and +2000revs.

Miss-fires under load are usually ignition related on the high voltage side. (It is more difficult to introduce a spark into a high pressure environment).
As per other's advice - coil packs.

[krassegrand]

Re: Miss Fire makes short irregular visits!

http://www.fq101.co.uk/how-to-guides...or-change.html


But I would read the codes, see if it is linked to a specific cylinder, and check the coil packs.
Swap them to a different cylinder and see if the error codes follows.

There are no fault codes, fault codes would have made it easyer to isolate the problem.
I was taking a trip yersterday with a mOBiDic connected but then of course the problem did not revial itself.
I will take a look when I come home today, there might be something I have missed when swapping engines.

Jörgen

[krassegrand]

Re: Miss Fire makes short irregular visits!

http://www.fq101.co.uk/how-to-guides...or-change.html


But I would read the codes, see if it is linked to a specific cylinder, and check the coil packs.
Swap them to a different cylinder and see if the error codes follows.

By the way Thank You for the part numbers!

Jörgen

[krassegrand]

Re: Miss Fire makes short irregular visits!

Cheapest brand new crank/ TDC sensor outside ebay is still less than 20 pounds from InCar Motor Factors in London.

http://www.incarmotorfactors.co.uk/switches-sensors--other-electrical/12931-meyle-crankshaft-position-sensor.html

21 pounds inclusive of delivery if you live in the UK.

That looks like a very good tip!
It was 1426SEK – 15% at the Swedish dealer.

Jörgen

[krassegrand]

Re: Miss Fire makes short irregular visits!

Cheapest brand new crank/ TDC sensor outside ebay is still less than 20 pounds from InCar Motor Factors in London.

http://www.incarmotorfactors.co.uk/switches-sensors--other-electrical/12931-meyle-crankshaft-position-sensor.html

21 pounds inclusive of delivery if you live in the UK.

That seems to be a very good price!
At least compared to what I have found in Sweden!

Thank You for the tip!
Jörgen

[tolsen]

Re: Miss Fire makes short irregular visits!

That seems to be a very good price!
At least compared to what I have found in Sweden!

Thank You for the tip!
Jörgen

Cheapest in Europe I think. Regrettably, according to their website, InCarMotorFactors only ship to UK.

[krassegrand]

Re: Miss Fire makes short irregular visits!

Well I have ordered and there was the choice Sweden when deciding shipping.

Jörgen