Can a bad fuel filter cause hard warm start?

[KardosR]

Question above.

 

[barnesautos]

Only real way to be sure is to measure the actual fuel pressure being delivered .

Are we talking Ph1 fuel filter ?

 

[KardosR]

Only real way to be sure is to measure the actual fuel pressure being delivered .

Are we talking Ph1 fuel filter ?

Sorry i forgot the details, it is a 2003, 1.5 dci. But it is starts nice when cool, but hardly when warm.

 

[R3k1355]

Surely cold starts would be even worse?

Can't cost much to change, but might be something else.

 

[botfch]

Unlikely, but you could always check for metal in the filter if the pumps on the way out.

Also check the temp sensor for faults.

 

[barnesautos]

Poor hot starts on a diesel will be down to low fuel pressure .
When the Hp pump get hot or expands with heat , thus causing low pressure .
Also injectors can cause this as when they also get hot they can been worn and pass excess amounts of fuel back to the return to tank .
Either way it’ll need checking .

I would research online / YouTube about DIY on how to measure Pizzo injectors return fuel flow .
4 tubes running off the injectors into a bottle for each and measure the amount of fuel being returned . [emoji1303]