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Hesitation when accelerating

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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JBC
Posts: 20
Joined: 19 March 2010
Year and Model: 1998 Volvo V70 GLT
Location: Virginia

Hesitation when accelerating

Post by JBC »

I have a 1998 V70 GLT. 155k. Just had the turbo rebuilt, new vacuumlines, new wheel bearing all four corners. Did it all myself, except I sent the turbo out for professional rebuild. Anyway, I have this hesitation that seems random when I hit the accelerator. I happens and I don't get codes. I did get codes on a start up with a crankcase sensor (335 I think), with some misses on cyliner codes 300,304. What might be happening?

jblackburn
MVS Moderator
Posts: 14043
Joined: 8 June 2008
Year and Model: 1998 S70 T5
Location: Alexandria, VA
Has thanked: 9 times
Been thanked: 19 times

Post by jblackburn »

Crankshaft sensor? That could do it. That's located just above the flywheel (flex plate, or whatever it's called on an automatic) by the transmission.

Image
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

JBC
Posts: 20
Joined: 19 March 2010
Year and Model: 1998 Volvo V70 GLT
Location: Virginia

Post by JBC »

THanks, I think I will replace it and do a tune up (plugs, cap, etc.). I heard that you should only use Volvo plugs and nothing else. Do you agree?

JBC
Posts: 20
Joined: 19 March 2010
Year and Model: 1998 Volvo V70 GLT
Location: Virginia

Post by JBC »

By the way, I'm just east of you in L-burg. The hokies were robbed out of the NCAA!!!

JBC
Posts: 20
Joined: 19 March 2010
Year and Model: 1998 Volvo V70 GLT
Location: Virginia

Post by JBC »

JMU Grad - sorry for messin' up your Nat Champ game.

jblackburn
MVS Moderator
Posts: 14043
Joined: 8 June 2008
Year and Model: 1998 S70 T5
Location: Alexandria, VA
Has thanked: 9 times
Been thanked: 19 times

Post by jblackburn »

The Volvo plugs are ridiculously expensive. Get your hands on some Bosch Copper plugs ($1.50 each) and gap them to .028". I believe NAPA, maybe Autozone sells them - I know for a fact that Advance does not.

If you're going to be replacing wires, use only Bougicord wires.

They totally were; I don't know how they go about making the decisions for that, but they're a bunch of idiots. I mean, beating that evil, much hated #1 team from my hometown had to count for something, right?
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

JBC
Posts: 20
Joined: 19 March 2010
Year and Model: 1998 Volvo V70 GLT
Location: Virginia

Post by JBC »

Yes, I think they, Duke, will when the Champ game and it will vindicate the Hokies.

JBC
Posts: 20
Joined: 19 March 2010
Year and Model: 1998 Volvo V70 GLT
Location: Virginia

Post by JBC »

Thanks for the tune up infor. Got go for now. Talk to you later. I'm on this site all the time.

Alecw81
Posts: 172
Joined: 31 January 2011
Year and Model: S70 GLT 1998
Location: Wilmington, NC
Been thanked: 1 time

Post by Alecw81 »

The Volvo plugs are expensive, but IMHO worth the money for a daily driver. Especially if you buy 1 of the tuneup kits from IPD or FCP that includes, plugs, wires, rotor, cap, etc.

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