Volvo TAMD 74L-B

[EP42]

My 2 Volvo TAMD 74L with EDC will only rev to 2000 rpm in Neutral
Out at sea with clean hull will only rev to 2150 rpm but the EDC sticks will go a lot further but the revs do not go up.
Any suggestions

 

[alt]

My KAD300's only rev to approx. 1500 (maybe a bit more) in neutral - I think this is normal.

Can't help you with the load question, though.

 

[volvopaul]

My 2 Volvo TAMD 74L with EDC will only rev to 2000 rpm in Neutral
Out at sea with clean hull will only rev to 2150 rpm but the EDC sticks will go a lot further but the revs do not go up.
Any suggestions

2000 in neutral is correct .
2150 you have a problem .

What boat , where , location

 

[EP42]

Princess 42 .Lymington

 

[Portofino]

Dirty / fouled props

 

[andy59]

Condensation in boost sensor tube ?

 

[volvopaul]

Condensation in boost sensor tube ?

Is this your neighbour Andy 59?

 

[andy59]

Not sure Paul , could be .

 

[Cymraeg]

Resurrecting this old thread as I have a similar problem with (no) boost - 98/99 vintage TAMD73P's in a 1999 Sealine which at full throttle will rev to 2000 rpm but no further, no turbos cutting in and no black smoke. Only tried this out at sea, have not tried in neutral, engines rated to 2600. No error codes, no black smoke. Assuming the worst it's boost sensor failure - have taken connections under ECU apart but doesn't seem anything serviceable. Are we still at replacement ECU's (I've seen and indeed contributed to the thread about the 73/74 etc. ECU's) or has someone cracked replacing/fixing the boost sensor in isolation? Or is there something else, perhaps vacuum leak?

Thanks.

 

[Newbroom]

Resurrecting this old thread as I have a similar problem with (no) boost - 98/99 vintage TAMD73P's in a 1999 Sealine which at full throttle will rev to 2000 rpm but no further, no turbos cutting in and no black smoke. Only tried this out at sea, have not tried in neutral, engines rated to 2600. No error codes, no black smoke. Assuming the worst it's boost sensor failure - have taken connections under ECU apart but doesn't seem anything serviceable. Are we still at replacement ECU's (I've seen and indeed contributed to the thread about the 73/74 etc. ECU's) or has someone cracked replacing/fixing the boost sensor in isolation? Or is there something else, perhaps vacuum leak?

Thanks.

Engine is limited to 2000 revs in neutral

 

[volvopaul]

Resurrecting this old thread as I have a similar problem with (no) boost - 98/99 vintage TAMD73P's in a 1999 Sealine which at full throttle will rev to 2000 rpm but no further, no turbos cutting in and no black smoke. Only tried this out at sea, have not tried in neutral, engines rated to 2600. No error codes, no black smoke. Assuming the worst it's boost sensor failure - have taken connections under ECU apart but doesn't seem anything serviceable. Are we still at replacement ECU's (I've seen and indeed contributed to the thread about the 73/74 etc. ECU's) or has someone cracked replacing/fixing the boost sensor in isolation? Or is there something else, perhaps vacuum leak?

Thanks.

Boost control switch fault inside ecu

 

[Cymraeg]

Boost control switch fault inside ecu

New ECU? Or fixable?

 

[volvopaul]

New ECU? Or fixable?

Boost sensor about £300

 

[Cymraeg]

Boost sensor about £300

Thanks - that's brilliant news.

Easy to do? Looks glued in.

 

[volvopaul]

Thanks - that's brilliant news.

Easy to do? Looks glued in.

Gentle persuasion with a screwdriver

 

[Cymraeg]

Gentle persuasion with a screwdriver

You're a star.

 

[Cymraeg]

Sorry to keep resurrecting this old thread, but afraid I'm still struggling.

First, is there a technique for getting the last remnants of the potting compound away from the sensor? I'm a bit loathe to attack it with chemicals such as acetone, but if needs must.... Note I have 73's not 74's as per title.

Secondly, the boost sensor is not listed separately here :-

https://marinepartseurope.com/en/de...ng&header=Fuel Injection Pump and Fuel Filter

Just the whole ECU (#17). I don't think the more common sensor number 881708 is correct from the illustrations, doesn't have the pins going into the circuit board.

Hope you can help - thanks.

 

[volvopaul]

Sorry to keep resurrecting this old thread, but afraid I'm still struggling.

First, is there a technique for getting the last remnants of the potting compound away from the sensor? I'm a bit loathe to attack it with chemicals such as acetone, but if needs must.... Note I have 73's not 74's as per title.

Secondly, the boost sensor is not listed separately here :-

https://marinepartseurope.com/en/dealer/mpe/category/Marine Diesel Engines/product/TAMD73P-A/explodedview/54161198?catalog=7740910&img=49184.png&header=Fuel Injection Pump and Fuel Filter

Just the whole ECU (#17). I don't think the more common sensor number 881708 is correct from the illustrations, doesn't have the pins going into the circuit board.

Hope you can help - thanks.

Look under section , contacts and sensors

 

[Cymraeg]

Look under section , contacts and sensors

Thanks - looked there and, whilst several options are given, nothing looks like the sensor in the ECU, which is now broken.

Part #18 in the first 'Contacts & Sensor' section, #5 in the second.