1999 Volvo V70 2.5 TDi D5252T Misfire Like Symptoms

petrohl34d · Jul 11th, 2017, 13:57

Driving along the other day and the diesel light came on. Almost immediately the car started chugging as if it was about to run out of fuel.

I stopped at a filling station and filled it up a bit, but the symptom still prevailed.

Got home, put a new fuel filter on and the car went 100%... until I let the diesel light come on shortly after (I've been really disorganised this week).

Almost immediately the car started chugging again as if it was about to run out of fuel.

On both occasions I found that the car drives ok if I drive easy, but if I put the foot down it starts to chug like it's being starved of fuel.

Is this likely to be dirt in the tank causing this?
Is it a coincidence that it seems to happen immediately after the diesel light comes on?
Is there anything else I should be looking at?

warninglight · Jul 11th, 2017, 14:01

I'd be swapping the in tank pump over if you can get hold of another one cheaply? I don't know much about the injector pumps yet, I've just bought a V70 TDI so I'm hoping to learn, as mine has an occasional hesitation that I can't reproduce or pinpoint.

martin_r_smith · Jul 11th, 2017, 20:12

Quote:

Originally Posted by warninglight

I'd be swapping the in tank pump over if you can get hold of another one cheaply? I don't know much about the injector pumps yet, I've just bought a V70 TDI so I'm hoping to learn, as mine has an occasional hesitation that I can't reproduce or pinpoint.

No in tank pump on these

Baffler · Jul 12th, 2017, 00:58

Quote:

Originally Posted by martin_r_smith

No in tank pump on these

Indeed, only a pickup and a rheostat to collect info for the fuel gauge.

Is is possible the end float is restricted or distorted (by clumsy hands) preventing correct reading? You should have approximately 7 litres once the lamp illuminates...circa 50 miles

petrohl34d · Jul 14th, 2017, 15:16

Turned out to be a broken wire on the top of the 4th injector.

Reconnected it and now running perfectly.

petrohl34d · Jul 17th, 2017, 15:59

What are the two devices in the diesel tank?

One is the sender obviously. Is the other one the fuel gauge?

IMG_8231.jpg
IMG_8234.jpg

V70Zig · Jul 17th, 2017, 20:11

I might be wrong but I thought the "sender" was for the fuel guage reading ?
and the other is possibly the low level warning on the dash.

doingitsideways · Jul 17th, 2017, 23:06

The first looks like a dummy for what would be the pump on petrol cars?

huron · Jul 18th, 2017, 05:59

This any help? I also think one may be a dummy to block the hole, although a rather elaborate one.
Had another think. One with the pipes is the pickup and return with a space where a pump might be, the other is the level sender.

petrohl34d · Jul 18th, 2017, 15:49

Cheers Huron, that explains it.

Jul 11th, 2017, 13:57	#1
petrohl34d Senior Member Last Online: May 25th, 2024 12:20 Join Date: Jan 2016 Location: Enniskillen	1999 Volvo V70 2.5 TDi D5252T Misfire Like Symptoms Driving along the other day and the diesel light came on. Almost immediately the car started chugging as if it was about to run out of fuel. I stopped at a filling station and filled it up a bit, but the symptom still prevailed. Got home, put a new fuel filter on and the car went 100%... until I let the diesel light come on shortly after (I've been really disorganised this week). Almost immediately the car started chugging again as if it was about to run out of fuel. On both occasions I found that the car drives ok if I drive easy, but if I put the foot down it starts to chug like it's being starved of fuel. Is this likely to be dirt in the tank causing this? Is it a coincidence that it seems to happen immediately after the diesel light comes on? Is there anything else I should be looking at? __________________ 1998 Volvo V70 2.5 TDi - Dead @ 326,000 miles 1999 Volvo V70 2.5 TDi - Dead @ 250,000 miles 2005 Volvo XC70 2.4 D5 - Current daily

Jul 11th, 2017, 14:01	#2
warninglight VOC Member Last Online: May 31st, 2024 12:46 Join Date: Dec 2011 Location: South Lakes	I'd be swapping the in tank pump over if you can get hold of another one cheaply? I don't know much about the injector pumps yet, I've just bought a V70 TDI so I'm hoping to learn, as mine has an occasional hesitation that I can't reproduce or pinpoint. __________________ 2008 XC70 SE Lux D5 - 1966 Amazon - 1979 C202 Laplander Past: 1997 S70 TDi, 1997 C70 T5 GT, 2003 V70 Bi-Fuel, 2000 Ph2 V70 2.5D, 1997 V70R Auto FWD, 1998 V70R Manual AWD, 2004 XC90 D5 G/T, 2005 S60 D5

Jul 14th, 2017, 15:16	#5
petrohl34d Senior Member Last Online: May 25th, 2024 12:20 Join Date: Jan 2016 Location: Enniskillen	Turned out to be a broken wire on the top of the 4th injector. Reconnected it and now running perfectly. __________________ 1998 Volvo V70 2.5 TDi - Dead @ 326,000 miles 1999 Volvo V70 2.5 TDi - Dead @ 250,000 miles 2005 Volvo XC70 2.4 D5 - Current daily

Jul 17th, 2017, 15:59	#6
petrohl34d Senior Member Last Online: May 25th, 2024 12:20 Join Date: Jan 2016 Location: Enniskillen	What are these? What are the two devices in the diesel tank? One is the sender obviously. Is the other one the fuel gauge? IMG_8231.jpg IMG_8234.jpg __________________ 1998 Volvo V70 2.5 TDi - Dead @ 326,000 miles 1999 Volvo V70 2.5 TDi - Dead @ 250,000 miles 2005 Volvo XC70 2.4 D5 - Current daily

Jul 17th, 2017, 20:11	#7
V70Zig Master Member Last Online: May 20th, 2024 14:18 Join Date: Sep 2012 Location: Loughborough	I might be wrong but I thought the "sender" was for the fuel guage reading ? and the other is possibly the low level warning on the dash. __________________ 2008 V70 SE D5 Auto 185 ...now 205 Volvo Polestar......190k Passed away - 1999 V70 2.5tdi Auto 340632 miles, RIP.

Jul 17th, 2017, 23:06	#8
doingitsideways The Daddy Last Online: Feb 29th, 2024 15:07 Join Date: May 2010 Location: Manchester	The first looks like a dummy for what would be the pump on petrol cars? __________________ XC90 V8 Exec, C70 2.4T Convertible, S70 T5 CD, 850 TDI, 2 x Escort vans and a 2.8i Capri. Clearout has begun, but must continue!

Jul 18th, 2017, 15:49	#10
petrohl34d Senior Member Last Online: May 25th, 2024 12:20 Join Date: Jan 2016 Location: Enniskillen	Cheers Huron, that explains it. __________________ 1998 Volvo V70 2.5 TDi - Dead @ 326,000 miles 1999 Volvo V70 2.5 TDi - Dead @ 250,000 miles 2005 Volvo XC70 2.4 D5 - Current daily

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