IPD sale Volvo Parts
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

Persistent misfire Topic is solved

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

shegarty
Posts: 232
Joined: Mon Sep 12, 2011 7:38 am
Year and Model: 1998
Location: port hope
Has thanked: 7 times
Been thanked: 1 time
Canada
shegarty

Re: Persistent misfire

Post by shegarty » Wed May 08, 2019 6:29 am

Thanks for all the suggestions ... upon even further investigation it appears to be an intake gasket failure at cylinder #1, and possibly a leak around the aforementioned vacuum elbow. I'll know more once I get the intake removed. Parts are on order but since I live in the great white north it will be a week or so before they get here - we seriously need a better option for decent parts in Canada.


current - 98 S70 T5 SE (225k km)
previous - 90 745T (400k km - sold); 94 855 T5 - (206k km - blown timing idler bearing)

User avatar
abscate
MVS Moderator
Posts: 17043
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 178 times
Been thanked: 538 times
Trinidad & Tobago
abscate

Re: Persistent misfire

Post by abscate » Wed May 08, 2019 7:27 am

RickHaleParker wrote:
Tue May 07, 2019 4:19 pm
I missed the '98.

Could be a intake manifold gasket leak at #1. Fire it up and spray some starting fluid around intake manifold port #1. If there is a intake manifold gasket leak at #1, it will suck in starting fluid and you will hear the engine surge. If it does surge, let it scare you and back off on the starting fluid.

Lower compression at #1 could be the cause also.
Another set of Volvo horns for Ricks’ shelf, laurels, and accolades; an event worthy of a semicolon.


1 SWMBO for 30 years
2 Volvos
3 VWs
4 Careers
5 cats/dogs/gears
6 Perfect Ladies in waiting
7 Drivers
8 Boats- with a big pointy metal thing on top

1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

Post Reply