Tu5J4 Stops Pulling After 4500Rpm

[samthornton1990 23]

As in the title, under light load it'll pull up to around 6 then start hesitating and coughing, under heavy load it gets to 4 and a half and just coughs and splutters.

 

Anyone have any suggestions?

 

I've replaced the MAP Sensor, coil pack, spark plugs, had a spare set of injectors so tried them as well, it did work a bit better but it's just gone back to running like a bag of spanners again, doesn't even come on cam anymore.

 

 

[welshpug 1,661]

check the tps and its wiring.

 

got the obd plug still?

[samthornton1990 23]

We checked that, it's on a permanent live? Reading still changes when you move it's position.

 

And no it hasn't.

 

It's a Single Plug ECU if that's any help

Edited May 21, 2017 by samthornton1990

[welshpug 1,661]

Id get the obd wiring reinstated and see what data you get, its not many wires even though its a 16 pin plug

[samthornton1990 23]

I will look into it. Just been out for a spin. Now only going up to 6000 just revving on it's own. No load on it

[jackherer 543]

As already said reading codes is vital, however it sounds like it's struggling when fuel demand is highest so it might be the fuel pump failing.

[samthornton1990 23]

I'll have a play with the wiring and get one in somehow.

 

As for the fuel pump I have thought it may be one of the culprits.

 

Look at this on eBay http://www.ebay.co.uk/itm/151140747189

 

Seems to be alright for the money?

[welshpug 1,661]

I'd get a standard pump, more than enough even for the highest power na tu you can think of.

[samthornton1990 23]

Sound job, It's cheaper than the Delphi replacement part haha