Exhaust and fuelling?

mikkey850 · Jul 24th, 2015, 13:18

Hello all,

I recently bought a 1999 S40 T4 for pennies from a family member. And I am currently going through bringing it back to its former glory.

I have a couple of questions regarding fitments of some parts;

1) The exhaust has snapped between the first silencer and the joint to the cat converter section. I was wondering if the middle section of the exhaust is the same as other S40s? I.e the 1.8 or 2.0 litre models, as there are a few at our local scrap yard with great condition exhausts, or would they be too smaller diameter? Failing that the only one I can find for reasonable money is made by Clarius, which are terrible for rot!

2) I was warned that the fuel pump had been replaced by one from a smaller engined S40, I am not sure which engine but I assume it won't be able to keep up with the demand of the T4 under high boost? The car seems to cut for a second or so when held at WOT in 3rd/4th as the revs build up, could this be pump related? Seems worse when under 1/4 of a tank and happens when low on fuel and cornering!

Can anyone recommend a decent aftermarket replacement for the standard T4 pump, as they seem very expensive new at around £270!

Any input would be great!

Thanks,

Mike.

ww1dm1 · Jul 24th, 2015, 15:08

Quote:

Originally Posted by mikkey850

2) I was warned that the fuel pump had been replaced by one from a smaller engined S40, I am not sure which engine but I assume it won't be able to keep up with the demand of the T4 under high boost? The car seems to cut for a second or so when held at WOT in 3rd/4th as the revs build up, could this be pump related? Seems worse when under 1/4 of a tank and happens when low on fuel and cornering!

The T4 pump is more powerful than on the other petrol engines. According to Haynes it delivers 150l/h, while the rest manage 120l/h. So if you ask me it is completely plausible that the lower pump power causes power problems at WOT. Especially if you feel it more when low on fuel and cornering.

mikkey850 · Jul 24th, 2015, 16:20

Thank you for that info ww1dm1! Could you recommend a decent aftermarket fuel pump which may fit? As the official ones seem a little expensive at £270! I am not planning on driving the car again until I have these issues sorted anyway due to fears of it running lean. I am going to just bite the bullet and order the klarius exhaust I think!

Regards,

Mike.

ww1dm1 · Jul 24th, 2015, 17:12

Quote:

Originally Posted by mikkey850

Thank you for that info ww1dm1! Could you recommend a decent aftermarket fuel pump which may fit? As the official ones seem a little expensive at £270! I am not planning on driving the car again until I have these issues sorted anyway due to fears of it running lean. I am going to just bite the bullet and order the klarius exhaust I think!

Regards,

Mike.

Never changed mine so can't recommend anything specific, though for that price I've seen whole sender units together with the floater which you probably don't need.

coffeejunky · Jul 24th, 2015, 21:07

Best option is to retrofit a Walbro 342 into the original sender unit. Make sure you get a genuine one, lots of copies and fakes floating around eBay!

Guide here:
http://www.30forty50.com/forum/topic..._fromsearch__1

The Walbro 342 is recommended over the 340 in the guide as the pickup is more similar to the OEM pump so will give zero issues with pickup uphill or round corners.

steakpie · Jul 24th, 2015, 21:53

you can buy A full Swedish replacement unit
a lot cheaper than original volvo but I've never used
the company so dont know the quality http://partsforvolvosonline.com

mikkey850 · Aug 1st, 2015, 15:28

Hello everyone, today I changed the oil. Oil filter. Air filter and fuel filter, starting from warm or cold is smoother and the throttle seemed more responsive. Took it out for a drive and I'm not sure what I have managed to do but it's not happy

It was bogging and holding back loads when accelerating in 3rd gear and then it bogged out completely until I let off the throttle and back on!

The next time it did this I kept my foot to the floor and put the clutch in to see what happened. The revs dropped slowly to idle and then shot back up again!

Any idea what this could be? Have I upset something whilst doing the other work as not sure if anything I have done would have had a negative effect?

Thanks.

Mike.

v40alex · Aug 2nd, 2015, 14:51

What engine have you got? Edit - '99 T4 - sorry just noticed there is a first page in this thread

Checking the fuel filter would be my first port of call - perhaps the seals aren't in properly?

mikkey850 · Aug 2nd, 2015, 14:59

Hello v40alex,

I had a pole around checking all the work I had done. And checking anything I might have upset in doing so. And couldn't find anything obvious. Drove it today and it's perfectly fine! Not sure if there was an air Lock in the fuel filter or something?

Thanks,

Mike.

v40alex · Aug 2nd, 2015, 15:15

Air in the filter was what I was thinking, sounds like it just needed a burp

Jul 24th, 2015, 13:18	#1
mikkey850 Member Last Online: Aug 21st, 2015 13:04 Join Date: Dec 2013 Location: York	Exhaust and fuelling? Hello all, I recently bought a 1999 S40 T4 for pennies from a family member. And I am currently going through bringing it back to its former glory. I have a couple of questions regarding fitments of some parts; 1) The exhaust has snapped between the first silencer and the joint to the cat converter section. I was wondering if the middle section of the exhaust is the same as other S40s? I.e the 1.8 or 2.0 litre models, as there are a few at our local scrap yard with great condition exhausts, or would they be too smaller diameter? Failing that the only one I can find for reasonable money is made by Clarius, which are terrible for rot! 2) I was warned that the fuel pump had been replaced by one from a smaller engined S40, I am not sure which engine but I assume it won't be able to keep up with the demand of the T4 under high boost? The car seems to cut for a second or so when held at WOT in 3rd/4th as the revs build up, could this be pump related? Seems worse when under 1/4 of a tank and happens when low on fuel and cornering! Can anyone recommend a decent aftermarket replacement for the standard T4 pump, as they seem very expensive new at around £270! Any input would be great! Thanks, Mike.

Jul 24th, 2015, 21:07	#5
coffeejunky Young Padawan Last Online: Mar 15th, 2020 23:42 Join Date: May 2013 Location: Bath	Best option is to retrofit a Walbro 342 into the original sender unit. Make sure you get a genuine one, lots of copies and fakes floating around eBay! Guide here: http://www.30forty50.com/forum/topic..._fromsearch__1 The Walbro 342 is recommended over the 340 in the guide as the pickup is more similar to the OEM pump so will give zero issues with pickup uphill or round corners. __________________ 2001 Phase 2 V40 1.8s Manual: Family Pack, Pure Silver, 121k miles.

Jul 24th, 2015, 21:53	#6
steakpie Junior Member Last Online: Oct 11th, 2016 23:53 Join Date: Jul 2015 Location: up north	you can buy A full Swedish replacement unit a lot cheaper than original volvo but I've never used the company so dont know the quality http://partsforvolvosonline.com __________________ 2000 s40 t4 b4192T2

Aug 2nd, 2015, 14:51	#8
v40alex I do like a V40 Last Online: Dec 1st, 2018 19:03 Join Date: Oct 2013 Location: North Surrey	What engine have you got? Edit - '99 T4 - sorry just noticed there is a first page in this thread Checking the fuel filter would be my first port of call - perhaps the seals aren't in properly? __________________ Current: '02 V40 1.9TD, '02 V40 T4 Previous: '00 V40 1.9TD, '99 V40 1.9TD, '97 V40 2.0CDi, '87 240DL Last edited by v40alex; Aug 2nd, 2015 at 14:54.

Aug 2nd, 2015, 15:15	#10
v40alex I do like a V40 Last Online: Dec 1st, 2018 19:03 Join Date: Oct 2013 Location: North Surrey	Air in the filter was what I was thinking, sounds like it just needed a burp __________________ Current: '02 V40 1.9TD, '02 V40 T4 Previous: '00 V40 1.9TD, '99 V40 1.9TD, '97 V40 2.0CDi, '87 240DL

Jul 24th, 2015, 16:20	#3
mikkey850 Member Last Online: Aug 21st, 2015 13:04 Join Date: Dec 2013 Location: York	Thank you for that info ww1dm1! Could you recommend a decent aftermarket fuel pump which may fit? As the official ones seem a little expensive at £270! I am not planning on driving the car again until I have these issues sorted anyway due to fears of it running lean. I am going to just bite the bullet and order the klarius exhaust I think! Regards, Mike.

Aug 1st, 2015, 15:28	#7
mikkey850 Member Last Online: Aug 21st, 2015 13:04 Join Date: Dec 2013 Location: York	Hello everyone, today I changed the oil. Oil filter. Air filter and fuel filter, starting from warm or cold is smoother and the throttle seemed more responsive. Took it out for a drive and I'm not sure what I have managed to do but it's not happy It was bogging and holding back loads when accelerating in 3rd gear and then it bogged out completely until I let off the throttle and back on! The next time it did this I kept my foot to the floor and put the clutch in to see what happened. The revs dropped slowly to idle and then shot back up again! Any idea what this could be? Have I upset something whilst doing the other work as not sure if anything I have done would have had a negative effect? Thanks. Mike.

Aug 2nd, 2015, 14:59	#9
mikkey850 Member Last Online: Aug 21st, 2015 13:04 Join Date: Dec 2013 Location: York	Hello v40alex, I had a pole around checking all the work I had done. And checking anything I might have upset in doing so. And couldn't find anything obvious. Drove it today and it's perfectly fine! Not sure if there was an air Lock in the fuel filter or something? Thanks, Mike.

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