20 Amp ECU Fuse

[Dave 500]

Hi all can anyone help my 20 amp ECU fuse keeps blowing any ideas.

[Dave 500]

Anyone got any ideas

I've now removed the fuse box to check the cables which is all ok.
Checked all the relays which are ok
Checked the loom inside the car which seems to be fine.
Looked inside the ECU and it seems to be fine.

Help.....

[That Daddy]

have you checked its supposed to be a 20 amp fuse,how many fuses have you blown?now their not cheapo specials are they?

[Dave 500]

That Daddy said:

have you checked its supposed to be a 20 amp fuse,how many fuses have you blown?now their not cheapo specials are they?

Yep using 20 amp fuses. Blown about 10 so far trying diffrent things.

[That Daddy]

Dave 500 said:

That Daddy said:

have you checked its supposed to be a 20 amp fuse,how many fuses have you blown?now their not cheapo specials are they?

Yep using 20 amp fuses. Blown about 10 so far trying diffrent things.

Sure you have not had something spliced into that supply,possibly causing overloaded fuse,how long as it done this have you done anything electrical to the car recently?

[Dave 500]

That Daddy said:

Dave 500 said:

That Daddy said:

have you checked its supposed to be a 20 amp fuse,how many fuses have you blown?now their not cheapo specials are they?

Yep using 20 amp fuses. Blown about 10 so far trying diffrent things.

Sure you have not had something spliced into that supply,possibly causing overloaded fuse,how long as it done this have you done anything electrical to the car recently?

It started on saturday the aa man said it was more than likley the fuel pump coming to the end of its life and pulling to many amps so I changed it today and its still blowning. I've had a good look around all the cables in the foot well and can't see anything. Will have to start working round the car to try and find the problem. Do you know if the ECU fuse just runs the ECU.

[That Daddy]

Hang on a second Dave, i had something like this before if you have a restriction from the pump clogged filter or crimped fuel line it can overload the pump and give the symptoms you decribe,try and run a seperate feed to the live side of the pump and disconnect the original wire then see what happens,this is for a short period only and dont forget to have an inline fuse on the temporary supply wire,failing that try to back track the loom from the fuse board sometimes you would be suprised what else runs off one circuit even though it says ECU for example.

[Dave 500]

That Daddy said:

run a seperate feed to the live side of the pump and disconnect the original wire then see what happens,this is for a short period only and dont forget to have an inline fuse on the temporary supply wire

Good idea will try that in the morning.

[Dave 500]

Update time.

Just ran a feed to the fuel pump and the ECU fuse still popped. So I guess its not the pump.
Anyone got any more ideas?

Cheers

[That Daddy]

Dave 500 said:

Update time.

Just ran a feed to the fuel pump and the ECU fuse still popped. So I guess its not the pump.
Anyone got any more ideas?

Cheers

Dave,i would start checking that loom,also dont dismiss a fault inside the fusebox itself.

[Dave 500]

Just checked the cables in the dash and behind the stereo all ok. All the Alarm cables seem to be fine. Looked in the engine bay and found a thin cable going to the starter motor has melted away to bare metal.

looks like someone cable tied it to close to the manifold.

Edited by Dave 500 on Friday 8th June 09:22

[That Daddy]

Dave if that braided cloth hose their is fuel line get that changed as soon as poss,i am not kidding when i say early vauxhall & Vw,s used that stuff and its crap its life span is hopeless,oh yeh get that wire replaced,the fact thats anywhere near that hose worries me,not being bossy but that hose is an issue for me.

[Dave 500]

That Daddy said:

Dave if that braided cloth hose their is fuel line

Yep its the fuel return . Looks like a pig of a job to replace the cable think I'm just going to get it booked in.

[That Daddy]

Dave 500 said:

That Daddy said:

Dave if that braided cloth hose their is fuel line

Yep its the fuel return . Looks like a pig of a job to replace the cable think I'm just going to get it booked in.

Dave its a shame your not closer,i could have helped.

[Dave 500]

Oh well cheers for the offer anyway.