182 fuel non-return valve and FPR

[pj_sibley]

Please can someone provide a description of where the fuel non-return valve and fuel pressure regulator are situated on a 182 F4R? Are they both built into the fuel pump assembly under the rear seat?

If anyone has a diagram of the fuelling system, even better!!

 

[Dan@SJM]

Yes theyre in tank

 

[pj_sibley]

Thanks @Dan@SJM, much appreciated.

Would a tired non-return valve or FPR in the fuel pump assembly cause start-up issues/hesitation, or is that more likely to be due to TDC sensor, earths, starter motor?

 

[R3k1355]

More likely to be somewhere else, probably want to go through the ignition system first.
What sorta miles is the car on?

 

[pj_sibley]

@R3k1355, the car is on 115k and drives superbly. I've been doing quite a bit of servicing/overhaul work since I bought it anyway, including all the usual stuff like battery, oil/filter, coolant/thermostat/water pump, discs/pads, spark plugs, leads, coil pack, injectors, cambelt/depahser etc. However, the less than eager start-up puzzles me and there aren't that many places still to look....TDC sensor seems a likely culprit, think the one on there might be original!!

 

[Dan@SJM]

If its always when it's been left over night and it starts on the second go every time then yes it's most likely a leaky pump/fpr

Thanks @Dan@SJM, much appreciated.

Would a tired non-return valve or FPR in the fuel pump assembly cause start-up issues/hesitation, or is that more likely to be due to TDC sensor, earths, starter motor?

 

[pj_sibley]

Useful info, thanks @Dan@SJM.
Sometimes it starts up quick as you'd expect on the key. Sometimes it just sort of stumbles into life but never had to resort to a second turn of the key so far! Quickest starts are often when it's been left for a while. The slow, just about kick into life starts are often when using the car throughout the day.

 

[Dan@SJM]

Unlikely to be the fuel pump but not impossible. You want a fuel pressure test before you do anything

 

[pj_sibley]

Unlikely to be the fuel pump but not impossible. You want a fuel pressure test before you do anything

@Dan@SJM, sounds like a good plan.

I see that a basic fuel pressure test kit is only around £25-30 online. Just had a look under the bonnet...where is the fuel pressure test point on the F4R, as it certainly isn't obvious (to me at least)!

What sort of pressures should I be looking for on pre-ignition and at idle?

 

[Dan@SJM]

A basic kit won't work I'm afraid, as there is no test point. I've just shelled out nearly £500 on the genuine Renault kit (and that still needs faffing to fit a 1*2 fuel rail). I'd like to see about 1 bar on pre gin and 3bar idle as its not rising rate

 

[R3k1355]

You've done the belts/dephaser/water pump - did you do those yourself??

 

[pj_sibley]

You've done the belts/dephaser/water pump - did you do those yourself??

I'm afraid not.
I know a Renault trained mechanic who did the job for me, along with a load of other 'hard to do' bits!

Shame about the lack of fuel pressure test point, makes things a little more challenging from a diagnosis point of view!!