Limited speed and acceleration

roady rhodes

Hello


Looking to get some information if possible.


I have a Peugeot van 1.6 hdi which predominantly does motorway miles and recently the check engine light has started to come on.


It would lose power intermittently but always went back to normal.(After stopping engine and starting again)



I brought it to a garage a couple of weeks ago for a full service.


Few days later after the service was done the engine light came back on.



However this time the power was very sluggish. Third and fourth gear were very bad for acceleration and top speed struggled to go over 80 mph (after taking ages to get up to that speed)

Also the cooling fan was staying on after stopping even on short journeys. Not sure if it was a Regen.



I brought it back to garage and got mechanic to check codes.

He reckoned that the DPF was clogged(bearing in mind there was a new DPF fitted last year) up and the turbo wasn't the problem.


He cleared the codes and suggested to put some fuel additive in and drive the van in third gear for 15 mins or so at 60 mph.



I attempted this and it seemed like the DPF was trying to clear as it chugged every now and then



So after doing this there is no change at all so just curious to know has anyone had any experience with this type of problem.


Thanks.

Dravokivich

Reads to me like your mechanic is guessing and getting you to do the work for him.

bazz26

Just clearing codes will not work if the underlying problem still remains. If it is a blocked DPF then you will probably need to find someone with Peugeot software who can force a DPF regeneration. Either a main Peugeot/Citroen dealer or a Peugeot/Citroen specialist are your best bet. If that fails to unblock it then your only option is probably to have the DPF removed and cleaned. There are a good companies around the country these days who provide this service.

roady rhodes

Thanks for your reply bazz

To be honest i wouldn't know a great deal about cars so i must ask does the symptoms i gave in my first post sound like a DPF problem ?

I thought that the van would go into limp mode if that was the case.

Since im getting speeds up to 80mph i assume that it is not in limp mode.

To me it seems like there's a blockage of some sort in the fuel system but i really can't be sure.

When i rev the engine in idle it seems to splurting when it reaches the higher revs if that makes sense.

Just trying to get a general idea of whats going wrong because not sure if my mechanic knows himself.

bazz26

Well the first thing you need to get done is have any fault codes properly read from the van's ECU. Did your mechanic look up the fault codes before deleting them? This might point to where the issue lies as it could very well be a senor rather than the DPF itself.

You really need someone who is familiar with these engines and has the correct diagnostic software to look at imo.

roady rhodes

I didn't get to see the codes myself but he said there was a few on it.

The mechanic was a foreign guy with broken English so i didn't really understand him clearly.

Appreciate your advice, thanks for your help.

Pkiernan

Very likely to be the fuel filter.

Clogged fuel filter will cause the symptoms you describe, and will throw some secondary faults codes...for example injector fault codes.

9935452

Just out of curiosity what year is the van . How long have you owned it and why was the dpf changed last year ? What mileage do you do a year?
Was it the same mechanic who was at it then

I've a Citroen C5, 1.6 Diesel and have similar issue at the moment. I considered it 'limp mode' but I know it's not really.

Effectively, the car will motor along until it gets to about 50-60kph, at which point accelleration becomes nonexistent. On a motorway, going up a hill, my foot is on the floor but the car slowly begins to drop in speed.. 120km.. 118km.. 116km.. until the road flattens out again or we go downhill.

Explained the issue to a chap at an engine place, and he reckons there's a 'solenoid switch' that connects to the turbo on the car, and it's knackered. He is of the opinion that the turbo itself is fine, but the switch is dead (predicts a cost of about €50-€60 to replace it). My car is due in with them tomorrow, so i wont know until maybe the end of the week if this is the problem or not, but i am hoping so.

Regardless of whether it works or not, I'll let you know.


EDIT: I've had limp mode before and as far as I recall the car wouldn't rev past 2000 revs. I had to get my mechanic to force regenerate it (this is about 2-3 years ago though). In this case, i can rev it up to (and beyond, I'm sure) the red line, but I just don't have any extra accelleration for my efforts.

roady rhodes

Turns out it wasn't the fuel filter

Got some codes though this time

Po243 which i think is the solenoid on the turbo

1497 think its something to do with carbon build up

Van going into a turbo specialist next week

Thanks KKV, any input and feedback appreciated.

roady rhodes

Just a quick update.



It was the solenoid on the turbo that was faulty.


Brought van to an auto electrician to fix and all fault codes gone now.


Driving well again.


Thanks all for help.

antodeco

[Deleted User] wrote: »

Explained the issue to a chap at an engine place, and he reckons there's a 'solenoid switch' that connects to the turbo on the car, and it's knackered. He is of the opinion that the turbo itself is fine, but the switch is dead (predicts a cost of about €50-€60 to replace it). My car is due in with them tomorrow, so i wont know until maybe the end of the week if this is the problem or not, but i am hoping so.

Benefits of a mechanic with experience!