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98 V70 T5 - Starts and dies

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

neworleans
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98 V70 T5 - Starts and dies

Post by neworleans »

Hello all,

I recently bought a 98 V70 T5 with 201K. It wasn't running when I got it and the seller told me that it needed a fuel pump and gave me the diagnose report from the mechanic. I replaced the fuel pump with a new after market cheap fuel pump for 33 bucks and also replaced the MAP sensor with a used one. Now the car starts but dies in 1-2 seconds. I am thinking that maybe the MAF sensor is bad because I had a similar issue with my 2000 S70 and I fixed it by replacing the MAF sensor. I am attaching the report from the mechanic, do you think replacing the MAF sensor would be a good shot? Any other ideas? Thanks in advance.

I forgot to add, I scanned the car with my OBD II scanner after replacing the fuel pump and during the replacement I had the battery disconnected and charged so I am thinking that disconnecting the battery may have reset the codes because I am not getting any codes now.
Attachments
v70.jpg
DrJammer
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Re: 98 V70 T5 - Starts and dies

Post by DrJammer »

try starting with the MAF unplugged.

as far as fuel pumps and MAF sensors, this forum has taught me that OEM parts for these are critical.
Ex-Volvos
2004 v70 N/A - traded in at 75k
2008 S60 - leased
1998 S70 T5 - might still have her if I knew about this forum when I owned it
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theWIFES_S70
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Re: 98 V70 T5 - Starts and dies

Post by theWIFES_S70 »

Wow​, $33 for a fuel pump? I'm a cheap as they come, but man, that's cheap... I installed a Hella from FCP into our car. It was $65+.

How good is your fuel pressure? Have you tried super priming your fuel line before starting? (Just turn the ignition to the on side four, five times before starting.)
1998 Volvo S70, N/A, 5-speed, 185K
2007 Volvo S40, 2.4i, 5-speed, 100K
neworleans
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Joined: Tue Apr 07, 2009 3:50 pm
Year and Model: 2007 S60R
Location: new orleans

Re: 98 V70 T5 - Starts and dies

Post by neworleans »

I usually buy my parts from FCP as well but this time I wanted to go with the cheapest way due to not running condition.
I don't know how to check the fuel pressure but I did it like you said, then it started, so I am assuming the fuel pump is working but not sure if the pressure is good enough.
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Winnebago
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Re: 98 V70 T5 - Starts and dies

Post by Winnebago »

so many possibilities... fuel pump relay? does upping the rpm right after start help?
'98 V70 T5M - lots of R parts - 201k+miles
'98 S70 GLT - bought new. sold at 185k miles
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theWIFES_S70
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Re: 98 V70 T5 - Starts and dies

Post by theWIFES_S70 »

neworleans wrote: Thu May 11, 2017 8:15 am I usually buy my parts from FCP as well but this time I wanted to go with the cheapest way due to not running condition.
I don't know how to check the fuel pressure but I did it like you said, then it started, so I am assuming the fuel pump is working but not sure if the pressure is good enough.
Glad you got it started! Yeah, fuel pumps are a tricky thing. It appears to be a little weak. Or it might just be a little shorter than the OE one. If you don't really care about the car too much, just make sure you super prime it before you drive and you should be good. Don't let that tank run low either. Cheap pumps burn out pretty easily.

Make sure you aren't leaking fuel from your fuel pressure damper. (Really easy to check, just look at the fuel rail, in between the first and second (or is it second and third?) fuel injector and see if there's any sign of fuel leaking.) They usually don't leak, but any sort of leak will give you a "sluggish" start and is dangerous!

There's a member on here who corrected a sluggish start condition by replacing (or cleaning out a a cheap plastic valve.) I think it was benpineapple, though I could be mistaken... I think it was this piece...

Image
http://www.ebay.com/itm/322275082655?_t ... EBIDX%3AIT

It's a real good idea to check out the relay. The last two digits on it will tell you the year it was made. If it's a 98, 97, 96 relay, you really should put another one in there. There's probably someone on here who can sell you a junkyard one from the 00s for cheaper than an aftermarket relay. You're running a T5 so don't even think about putting a KAE relay in there!
1998 Volvo S70, N/A, 5-speed, 185K
2007 Volvo S40, 2.4i, 5-speed, 100K
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cmblackburn
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Re: 98 V70 T5 - Starts and dies

Post by cmblackburn »

Definitely try replacing the fuel pump relay. I've cured so many cars with this same issue
1998 S70 T5"M", 273k "The Blue Turd"
2004 S40 2.4i, 164k "Cosmo"
2011 VW Jetta SportWagen TDI 6MT, 65k "Zoe"
cn90
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Re: 98 V70 T5 - Starts and dies

Post by cn90 »

- Search forum for photo of jumper on terminals 15 and 87 of the fuel relay socket. I posted some photos in the DIY.

- If that solves the problem, then the relay is bad.

- Aftermarket fuel pump is a crap shoot, I'd stick to Bosch 69693, about $80-$100 range but it is OEM quality that should give you some 150K-200K service.
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+
neworleans
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Joined: Tue Apr 07, 2009 3:50 pm
Year and Model: 2007 S60R
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Re: 98 V70 T5 - Starts and dies

Post by neworleans »

Thank you guys, I have a 2000 S70 GLT SE also, same fuel pump relay? If yes, will I need to disconnect the battery while swapping the relays?
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erikv11
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Re: 98 V70 T5 - Starts and dies

Post by erikv11 »

Yes, 93-00 (i.e., all P80s) all use the same fuel pump relay. No need to disconnect the battery for a swap or a jumper wire.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
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